http://www.ub.edu/cmematerials/ca/taxocsv0/%C3%A0cids ca http://www.ub.edu/cmematerials/ca/content/gresol-de-xamota <div class="field-group-tabs-wrapper field-group-tabs group-tab2 "><h2 class="element-invisible">Pestanyes verticals</h2><div class="vertical-tabs-panes"><input class="vertical-tabs-active-tab" type="hidden" /> <fieldset class="field-group-tab group-dades-generals collapsible collapsed form-wrapper" id="node_materials_rss_group_dades_generals"><legend><span class="fieldset-legend">Dades generals</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-classificaci- field-type-taxonomy-term-reference field-label-above"><div class="field-label">Classificació:&nbsp;</div><div class="field-items"><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/cer%C3%A0mic" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Ceràmic</a></div><div class="field-item odd"><a href="/cmematerials/ca/taxocsv0/convencionals" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Convencionals</a></div><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/refractaris" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Refractaris</a></div><div class="field-item odd"><a href="/cmematerials/ca/taxocsv0/%C3%A0cids" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Àcids</a></div></div></div><div class="field field-name-field-primeres-materies field-type-text field-label-above"><div class="field-label">Primeres matèries:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Ceràmiques de reciclats d'aluminosilicats, mullites, quars.</p> </div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p>La composició del gresol de xamota obtinguda per FRX és:</p> <table border="1" cellpadding="1" cellspacing="1" style="width: 500px;"><tbody><tr><td class="rtecenter"><strong>Component</strong></td> <td class="rtecenter"><strong>%</strong></td> </tr><tr><td class="rtecenter">SiO₂</td> <td class="rtecenter">58</td> </tr><tr><td class="rtecenter">Al₂O₃</td> <td class="rtecenter">33</td> </tr><tr><td class="rtecenter">Fe₂O₃</td> <td class="rtecenter">2,7</td> </tr><tr><td class="rtecenter">TiO₂</td> <td class="rtecenter">1,7</td> </tr><tr><td class="rtecenter">K₂O</td> <td class="rtecenter">1,6</td> </tr></tbody></table><p><span style="line-height: 1.6em;">Òxids amb composició inferior al 1%: CaO, MgO, Na₂O, P₂O₅, ZrO, SO₃, Cl, ZnO, SrO, BaO i PbO.</span></p> </div></div></div></div></fieldset> <fieldset class="field-group-tab group-diagrames collapsible collapsed form-wrapper" id="node_materials_rss_group_diagrames"><legend><span class="fieldset-legend">Diagrames</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-diagramas field-type-field-collection field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-diagramas clearfix" about="/cmematerials/ca/field-collection/field-g-diagramas/347" typeof=""> <div class="content"> <div class="field field-name-field-diagrames field-type-image field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/diagrames/Gresol%20de%20xamota.jpg" width="823" height="631" alt="" title="Principals productes ceràmics del sistema SiO2/CaO/Al2O3" /></div></div></div><div class="field field-name-field-diagrama-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>En la regió binària SiO₂/A_l2O₃ es troben nombrosos materials refractaris de tipus àcid.</p> </div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-diagramas clearfix" about="/cmematerials/ca/field-collection/field-g-diagramas/348" typeof=""> <div class="content"> <div class="field field-name-field-diagrames field-type-image field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/diagrames/Gresol%20de%20xamota1.jpg" width="938" height="798" alt="" title="Diagrama ternari del sistema SiO2/CaO/Al2O3" /></div></div></div><div class="field field-name-field-diagrama-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>El diagrama ternari SiO₂/CaO/Al₂O₃ inclou els màxims i punts invariants del sistema. Hi ha nombroses fases binàries així com dues fases ternàries. El mínim punt de fusió (1170ºC) es troba en un eutèctic ternari situat al voltant del 65% SiO₂, 20% CaO i 15% Al₂O₃.</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-tab group-caracteritzacio collapsible collapsed form-wrapper" id="node_materials_rss_group_caracteritzacio"><legend><span class="fieldset-legend"> Caracterització</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-difracci-de-raigs-x field-type-field-collection field-label-above"><div class="field-label">Difracció de raigs-X:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-difracci-de-raigs-x clearfix" about="/cmematerials/ca/field-collection/field-g-difracci-de-raigs-x/342" typeof=""> <div class="content"> <div class="field field-name-field-difraccio-raigs-x field-type-image field-label-above"><div class="field-label">Difracció de raigs-X:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/difraccio_de_raigs_x/Gresol%20de%20xamota.jpg" width="6052" height="3884" alt="" title="Difractograma de raigs X de un gressol" /></div></div></div><div class="field field-name-field-difraccio-raigs-x-prep field-type-text-long field-label-above"><div class="field-label">Preparació:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Les úniques fases cristal·lines presentes son dues formes polimòrfiques del SiO₂; quars i cristobalita.</p> </div></div></div> </div> </div> </div></div></div></div></div><div class="field-collection-container clearfix"><div class="field field-name-field-g-microscopia-optica field-type-field-collection field-label-above"><div class="field-label">Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/343" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Gresol%20de%20xamota.jpg" width="624" height="474" alt="" title="Macrografia Nº1" /></div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/344" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Gresol%20de%20xamota2.jpg" width="895" height="874" alt="" title="Imatge de gresol de Chamota" /></div></div></div><div class="field field-name-field-microscopia-optica-prep field-type-text-long field-label-above"><div class="field-label">Preparació:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Rodanxa del gresol de xamota, on es pot observar diferents partícules de tamany gran:les de color vermell seran d'hematites, les de color blanc quars, les de color negre (òxid que dongui color negre). La cara que s'observa ha estat polida.</p> </div></div></div> </div> </div> </div></div></div></div></div><div class="field-collection-container clearfix"><div class="field field-name-field-g-microscopia-electronica- field-type-field-collection field-label-above"><div class="field-label">Microscòpia electrònica de scanning:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/345" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Gresol%20de%20xamota.jpg" width="1010" height="832" alt="" title="Micrografia Nº1" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Aspecte típic de distribució de porositat grosa i fina amb microesquerdes.</p> <p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Gresol%20xamota1.jpg" style="width: 550px; height: 550px;" />​</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-htab group-aplicacions collapsible collapsed form-wrapper" id="node_materials_rss_group_aplicacions"><legend><span class="fieldset-legend">Aplicacions</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-obs-aplicacio field-type-text-with-summary field-label-above"><div class="field-label">Observacions:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Els refractaris són materials que es produeixen en grans quantitats pels revestiments dels forns, reactors, vehicles aeroespacials i, en general, dels equips que operen a altes temperatures. S'utilitzen en els processos de producció de metalls, vidres i altres ceràmics, tractaments tèrmics, centrals termoelèctriques i nuclears, etc. La majoria de refractaris àcids industrials tenen composicions properes al sistema binari SiO₂/Al₂O₃ Se'n distingeixen diferents tipus segons el contingut d'alúmina.</p> <p>Els gresols de xamota, estan formats per argila rica en sílice i alúmina, que s'ha barrejat amb pols d'argila refractaria ja cuita, amb sorra de quars i altres materials semblants</p> <p> </p> </div></div></div><div class="field-collection-container clearfix"><div class="field field-name-field-g-ima-aplicacions field-type-field-collection field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-ima-aplicacions clearfix" about="/cmematerials/ca/field-collection/field-g-ima-aplicacions/346" typeof=""> <div class="content"> <div class="field field-name-field-ima-aplicacions field-type-image field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/ima_aplicacions/Gresol%20de%20xamota.jpg" width="2370" height="1695" alt="" /></div></div></div><div class="field field-name-field-ima-aplicacions-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Gresols de xamota</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> </div></div><ul class="links inline"><li class="translation_es first last"><a href="/cmematerials/es/content/crisol-de-chamota" title="Crisol de Chamota" class="translation-link">Español</a></li> </ul> Fri, 10 May 2013 07:33:51 +0000 editor 60 at http://www.ub.edu/cmematerials http://www.ub.edu/cmematerials/ca/content/gresol-de-xamota#comments http://www.ub.edu/cmematerials/ca/content/compacte-44-d%C3%B2xid-dalumini <div class="field-group-tabs-wrapper field-group-tabs group-tab2 "><h2 class="element-invisible">Pestanyes verticals</h2><div class="vertical-tabs-panes"><input class="vertical-tabs-active-tab" type="hidden" /> <fieldset class="field-group-tab group-dades-generals collapsible collapsed form-wrapper" id="node_materials_rss_group_dades_generals"><legend><span class="fieldset-legend">Dades generals</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-classificaci- field-type-taxonomy-term-reference field-label-above"><div class="field-label">Classificació:&nbsp;</div><div class="field-items"><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/cer%C3%A0mic" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Ceràmic</a></div><div class="field-item odd"><a href="/cmematerials/ca/taxocsv0/convencionals" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Convencionals</a></div><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/refractaris" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Refractaris</a></div><div class="field-item odd"><a href="/cmematerials/ca/taxocsv0/%C3%A0cids" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Àcids</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p>La composició de la rajola refractària compacta obtinguda per FRx és:</p> <table border="1" cellpadding="1" cellspacing="1" style="width: 500px;"><tbody><tr><td class="rtecenter">Component</td> <td class="rtecenter">%</td> </tr><tr><td class="rtecenter">SiO₂</td> <td class="rtecenter">45</td> </tr><tr><td class="rtecenter">Al₂O₃</td> <td class="rtecenter">45</td> </tr><tr><td class="rtecenter">MgO</td> <td class="rtecenter">5,8</td> </tr><tr><td class="rtecenter">Fe₂O₃</td> <td class="rtecenter">1,8</td> </tr><tr><td class="rtecenter">K₂O</td> <td class="rtecenter">1,4</td> </tr></tbody></table><p><span style="line-height: 1.6em;">Òxi</span><span style="line-height: 1.6em;">ds amb composició inferior al 1%: TiO₂,P₂O₅ i La..Lu.</span></p> </div></div></div></div></fieldset> <fieldset class="field-group-tab group-diagrames collapsible collapsed form-wrapper" id="node_materials_rss_group_diagrames"><legend><span class="fieldset-legend">Diagrames</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-diagramas field-type-field-collection field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-diagramas clearfix" about="/cmematerials/ca/field-collection/field-g-diagramas/235" typeof=""> <div class="content"> <div class="field field-name-field-diagrames field-type-image field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/diagrames/Compacte%20%2844%25Al2O3%291.jpg" width="823" height="631" alt="" title="Principals productes ceràmics del sistema SiO2/CaO/Al2O3" /></div></div></div><div class="field field-name-field-diagrama-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>En la regió binària SiO₂/Al₂O₃ es troben nombrosos materials refractaris de tipus àcid.</p> </div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-diagramas clearfix" about="/cmematerials/ca/field-collection/field-g-diagramas/236" typeof=""> <div class="content"> <div class="field field-name-field-diagrames field-type-image field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/diagrames/Compacte%20%2844%25Al2O3%292.jpg" width="938" height="798" alt="" title="Diagrama ternari del sistema SiO2/CaO/Al2O3" /></div></div></div><div class="field field-name-field-diagrama-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>El diagrama ternari SiO2/CaO/Al₂O₃ inclou els màxims i punts invariants del sistema. Hi ha nombroses fases binàries així com dues fases ternàries. El mínim punt de fusió (1170ºC) es troba en un eutèctic ternari situat al voltant del 65% SiO₂, 20% CaO i 15% Al₂O₃</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-tab group-caracteritzacio collapsible collapsed form-wrapper" id="node_materials_rss_group_caracteritzacio"><legend><span class="fieldset-legend"> Caracterització</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-difracci-de-raigs-x field-type-field-collection field-label-above"><div class="field-label">Difracció de raigs-X:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-difracci-de-raigs-x clearfix" about="/cmematerials/ca/field-collection/field-g-difracci-de-raigs-x/228" typeof=""> <div class="content"> <div class="field field-name-field-difraccio-raigs-x field-type-image field-label-above"><div class="field-label">Difracció de raigs-X:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/difraccio_de_raigs_x/Compacte%20%2844%25Al2O3%29.jpg" width="1975" height="1296" alt="" /></div></div></div> </div> </div> </div></div></div></div></div><div class="field-collection-container clearfix"><div class="field field-name-field-g-microscopia-optica field-type-field-collection field-label-above"><div class="field-label">Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/229" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Compacte%20%2844%25Al2O3%291.jpg" width="624" height="474" alt="" title="x(20)" /></div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/230" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Compacte%20%2844%25Al2O3%292.jpg" width="624" height="474" alt="" title="x(30)" /></div></div></div> </div> </div> </div></div></div></div></div><div class="field-collection-container clearfix"><div class="field field-name-field-g-microscopia-electronica- field-type-field-collection field-label-above"><div class="field-label">Microscòpia electrònica de scanning:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/231" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2844%25Al2O3%291.jpg" width="1474" height="1178" alt="" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2844%25Al2O3%291.jpg" style="width: 697px; height: 385px;" /></p> </div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/232" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2844%25Al2O3%292.jpg" width="1474" height="1186" alt="" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/mapesdedistribucio/Compacte%20%2844%25Al2O3%292.1.jpg" style="width: 456px; height: 361px;" /></p> <p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/mapesdedistribucio/Compacte%20%2844%25Al2O3%292%2C2.jpg" style="width: 456px; height: 361px;" /></p> </div></div></div> </div> </div> </div></div></div></div></div><div class="field-collection-container clearfix"><div class="field field-name-field-g-microscopia-electroni-tr field-type-field-collection field-label-above"><div class="field-label">Microscòpia electrònica de transmissió:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electroni-tr clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electroni-tr/233" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-tr field-type-image field-label-above"><div class="field-label">Microscòpia electrònica de transmissió:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electroni_tr/Compacte%20%2844%25Al2O3%293.jpg" width="1472" height="1187" alt="" /></div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-htab group-obtencio collapsible collapsed form-wrapper" id="node_materials_rss_group_obtencio"><legend><span class="fieldset-legend">Obtenció</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-ima-obtencio field-type-field-collection field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-ima-obtencio clearfix" about="/cmematerials/ca/field-collection/field-g-ima-obtencio/234" typeof=""> <div class="content"> <div class="field field-name-field-ima-obtencio field-type-image field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/ima_obtencio/Compacte%2844%25Alumina%29.jpg" width="2940" height="1818" alt="" /></div></div></div><div class="field field-name-field-ima-obtencio-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Procés de fabricació de rajoles ceràmiques</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-htab group-aplicacions collapsible collapsed form-wrapper" id="node_materials_rss_group_aplicacions"><legend><span class="fieldset-legend">Aplicacions</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-obs-aplicacio field-type-text-with-summary field-label-above"><div class="field-label">Observacions:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Els refractaris són materials que es produeixen en grans quantitats pels revestiments dels forns, reactors, vehicles aeroespacials i, en general, dels equips que operen a altes temperatures. S'utilitzen en els processos de producció de metalls, vidres i altres ceràmics, tractaments tèrmics, centrals termoelèctriques i nuclears, etc.</p> <p>La majoria de refractaris àcids industrials tenen composicions properes al sistema binari SiO₂/Al₂O₃ Se'n distingeixen diferents tipus segons el contingut d'alúmina.</p> </div></div></div></div></fieldset> </div></div><ul class="links inline"><li class="translation_es first last"><a href="/cmematerials/es/content/compacto-44-de-%C3%B3xid-de-aluminio" title="Compacto (44% de óxid de Aluminio)" class="translation-link">Español</a></li> </ul> Tue, 07 May 2013 10:41:00 +0000 editor 43 at http://www.ub.edu/cmematerials http://www.ub.edu/cmematerials/ca/content/compacte-44-d%C3%B2xid-dalumini#comments http://www.ub.edu/cmematerials/ca/content/compacte-34-d%C3%B2xid-dalumini <div class="field-group-tabs-wrapper field-group-tabs group-tab2 "><h2 class="element-invisible">Pestanyes verticals</h2><div class="vertical-tabs-panes"><input class="vertical-tabs-active-tab" type="hidden" /> <fieldset class="field-group-tab group-dades-generals collapsible collapsed form-wrapper" id="node_materials_rss_group_dades_generals"><legend><span class="fieldset-legend">Dades generals</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-classificaci- field-type-taxonomy-term-reference field-label-above"><div class="field-label">Classificació:&nbsp;</div><div class="field-items"><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/cer%C3%A0mic" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Ceràmic</a></div><div class="field-item odd"><a href="/cmematerials/ca/taxocsv0/convencionals" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Convencionals</a></div><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/refractaris" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Refractaris</a></div><div class="field-item odd"><a href="/cmematerials/ca/taxocsv0/%C3%A0cids" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Àcids</a></div></div></div><div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even" property="content:encoded"><p>La composició de la rajola refractària àcida obtinguda per FRX és:</p> <table border="1" cellpadding="1" cellspacing="1" style="width: 500px;"><tbody><tr><td class="rtecenter">Component</td> <td class="rtecenter">%</td> </tr><tr><td class="rtecenter">SiO₂</td> <td class="rtecenter">59</td> </tr><tr><td class="rtecenter">Al₂O₃</td> <td class="rtecenter">34</td> </tr><tr><td class="rtecenter">Fe₂O₃</td> <td class="rtecenter">3,0</td> </tr><tr><td class="rtecenter">K₂O</td> <td class="rtecenter">1,9</td> </tr><tr><td class="rtecenter">T<span style="line-height: 1.6em;">iO₂</span></td> <td class="rtecenter">1,2</td> </tr></tbody></table><p><span style="line-height: 1.6em;">Òxids amb composició inferior al 1%: MgO, CaO, PbO i La..Lu.</span></p> </div></div></div></div></fieldset> <fieldset class="field-group-tab group-diagrames collapsible collapsed form-wrapper" id="node_materials_rss_group_diagrames"><legend><span class="fieldset-legend">Diagrames</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-diagramas field-type-field-collection field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-diagramas clearfix" about="/cmematerials/ca/field-collection/field-g-diagramas/238" typeof=""> <div class="content"> <div class="field field-name-field-diagrames field-type-image field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/diagrames/Compacte%20%2834%25Al2O3%291.jpg" width="668" height="522" alt="" title="Diagrama ternari" /></div></div></div><div class="field field-name-field-diagrama-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>En la regió binària SiO₂/Al₂O₃ es troben nombrosos materials refractaris de tipus àcid</p> </div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-diagramas clearfix" about="/cmematerials/ca/field-collection/field-g-diagramas/239" typeof=""> <div class="content"> <div class="field field-name-field-diagrames field-type-image field-label-above"><div class="field-label">Diagrames:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/diagrames/Compacte%20%2834%25Al2O3%292.jpg" width="938" height="798" alt="" title="Diagrama ternari del sistema SiO2/CaO/Al2O3" /></div></div></div><div class="field field-name-field-diagrama-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>El diagrama ternari SiO₂/CaO/Al₂O₃ inclou els màxims i punts invariants del sistema. Hi ha nombroses fases binàries així com dues fases ternàries. El mínim punt de fusió (1170ºC) es troba en un eutèctic ternari situat al voltant del 65% SiO₂, 20% CaO i 15% Al₂O₃.</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-tab group-caracteritzacio collapsible collapsed form-wrapper" id="node_materials_rss_group_caracteritzacio"><legend><span class="fieldset-legend"> Caracterització</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-microscopia-optica field-type-field-collection field-label-above"><div class="field-label">Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/213" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Compacte%20%2834%25Al2O3%291.jpg" width="624" height="474" alt="" title="Macrografia Nº1" /></div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/214" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Compacte%20%2834%25Al2O3%292.jpg" width="623" height="474" alt="" title="Macrografia Nº2 (x20)" /></div></div></div> </div> </div> </div></div><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/215" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Compacte%20%2834%25Al2O3%293.jpg" width="623" height="474" alt="" title="Macrografia Nº3 (x60)" /></div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-optica clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-optica/216" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-optica field-type-image field-label-above"><div class="field-label"> Microscòpia òptica:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_optica/Compacte%20%2834%25Al2O3%294.jpg" width="624" height="474" alt="" title="Macrografia Nº4 (x60)" /></div></div></div> </div> </div> </div></div></div></div></div><div class="field-collection-container clearfix"><div class="field field-name-field-g-microscopia-electronica- field-type-field-collection field-label-above"><div class="field-label">Microscòpia electrònica de scanning:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/218" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%291.jpg" width="1453" height="1171" alt="" title="Micrografia Nº1" /></div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/219" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%292.jpg" width="1456" height="1181" alt="" title="Micrografia Nº2" /></div></div></div> </div> </div> </div></div><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/220" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%293.jpg" width="1457" height="1183" alt="" title="Micrografia Nº3" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2834%25Al2O3%293.jpg" style="width: 697px; height: 385px;" /></p> <p><span style="line-height: 1.6em;">EDS 3. part brillant</span></p> <p><span style="line-height: 1.6em;"><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/mapesdedistribucio/Compacte%20%2834%25Al2O3%293.jpg" style="width: 456px; height: 362px;" /></span></p> <p><span style="line-height: 1.6em;"><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/mapesdedistribucio/Compacte%20%2834%25Al2O3%293.2.jpg" style="width: 455px; height: 364px;" /></span></p> <p><span style="line-height: 1.6em;"><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/mapesdedistribucio/Compacte%20%2834%25Al2O3%293.3.jpg" style="width: 457px; height: 361px;" /></span></p> </div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/221" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%294.jpg" width="1454" height="1183" alt="" title="Micrografia Nº4" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2834%25Al2O3%294.jpg" style="width: 697px; height: 385px;" /></p> <p> </p> </div></div></div> </div> </div> </div></div><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/222" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%295.jpg" width="1454" height="1178" alt="" title="Micrografia Nº5" /></div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/223" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%296.jpg" width="1450" height="1181" alt="" title="Micrografia Nº6" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2834%25Al2O3%296.1.jpg" style="width: 697px; height: 385px;" /></p> <p><span style="color: rgb(0, 0, 0); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; line-height: normal;">EDS 6. 1. partícules d'alumini</span></p> <p><span style="color: rgb(0, 0, 0); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; line-height: normal;"><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2834%25Al2O3%296.2.jpg" style="width: 697px; height: 385px;" /></span></p> <p><span style="color: rgb(0, 0, 0); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; line-height: normal;">EDS 6. 2. partícules més grans</span></p> </div></div></div> </div> </div> </div></div><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/224" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%297.jpg" width="1456" height="1178" alt="" title="Micrografia Nº7" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2834%25Al2O3%297.jpg" style="width: 697px; height: 385px;" /></p> </div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/225" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%298.jpg" width="1457" height="1181" alt="" title=" Micrografia Nº8" /></div></div></div> </div> </div> </div></div><div class="field-item even"><div class="field-collection-view clearfix view-mode-full"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/226" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%299.jpg" width="1455" height="1181" alt="" title="Micrografia Nº9" /></div></div></div><div class="field field-name-field-microscopia-electronica-de field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2834%25Al2O3%299.1.jpg" style="width: 697px; height: 385px;" /></p> <p><span style="color: rgb(0, 0, 0); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; line-height: normal;">EDS 9. 1. partícula més fosca centrada</span></p> <p><span style="color: rgb(0, 0, 0); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; line-height: normal;"><img alt="" src="http://www.ub.edu/cmematerials/sites/default/files/EDS/Compacte%20%2834%25Al2O3%299.2.jpg" style="width: 697px; height: 385px;" /></span></p> <p><span style="color: rgb(0, 0, 0); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; line-height: normal;">EDS 9. 2. partícula més brillant</span></p> </div></div></div> </div> </div> </div></div><div class="field-item odd"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-microscopia-electronica- clearfix" about="/cmematerials/ca/field-collection/field-g-microscopia-electronica-/227" typeof=""> <div class="content"> <div class="field field-name-field-microscopia-electronica-sc field-type-image field-label-above"><div class="field-label"> Microscòpia electrònica de rastreig:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/microscopia_electronica_sc/Compacte%20%2834%25Al2O3%2910.jpg" width="1455" height="1179" alt="" title="Micrografia Nº10" /></div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-tab group-prelectriques collapsible collapsed form-wrapper" id="node_materials_rss_group_prelectriques"><legend><span class="fieldset-legend">Propietats elèctriques</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-observacions-prop-elect field-type-text-with-summary field-label-above"><div class="field-label">Observacions:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Aïllant elèctric</p> </div></div></div></div></fieldset> <fieldset class="field-group-tab group-prtermiques collapsible collapsed form-wrapper" id="node_materials_rss_group_prtermiques"><legend><span class="fieldset-legend">Propietats tèrmiques</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-observacions-prop-termi field-type-text-with-summary field-label-above"><div class="field-label">Observacions:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Resistència a elevades temperatures</p> </div></div></div></div></fieldset> <fieldset class="field-group-htab group-obtencio collapsible collapsed form-wrapper" id="node_materials_rss_group_obtencio"><legend><span class="fieldset-legend">Obtenció</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-ima-obtencio field-type-field-collection field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-ima-obtencio clearfix" about="/cmematerials/ca/field-collection/field-g-ima-obtencio/237" typeof=""> <div class="content"> <div class="field field-name-field-ima-obtencio field-type-image field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/ima_obtencio/Compacte%2844%25Alumina%29_0.jpg" width="2940" height="1818" alt="" /></div></div></div><div class="field field-name-field-ima-obtencio-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Procés de fabricació de les rajoles ceràmiques</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-htab group-conformacio collapsible collapsed form-wrapper" id="node_materials_rss_group_conformacio"><legend><span class="fieldset-legend">Conformació</span></legend><div class="fieldset-wrapper"><div class="field-collection-container clearfix"><div class="field field-name-field-g-ima-conformacio field-type-field-collection field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><div class="field-collection-view clearfix view-mode-full field-collection-view-final"><div class="entity entity-field-collection-item field-collection-item-field-g-ima-conformacio clearfix" about="/cmematerials/ca/field-collection/field-g-ima-conformacio/217" typeof=""> <div class="content"> <div class="field field-name-field-ima-conformacio field-type-image field-label-above"><div class="field-label">Imatges:&nbsp;</div><div class="field-items"><div class="field-item even"><img typeof="foaf:Image" src="http://www.ub.edu/cmematerials/sites/default/files/ima_conformacio/Compacte%2834%25Alumina%29.jpg" width="656" height="512" alt="" /></div></div></div><div class="field field-name-field-ima-conformacio-desc field-type-text-long field-label-above"><div class="field-label">Descripció:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Imatge de rajola refractària àcida</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-htab group-aplicacions collapsible collapsed form-wrapper" id="node_materials_rss_group_aplicacions"><legend><span class="fieldset-legend">Aplicacions</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-obs-aplicacio field-type-text-with-summary field-label-above"><div class="field-label">Observacions:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Els refractaris són materials que es produeixen en grans quantitats pels revestiments dels forns, reactors, vehicles aeroespacials i, en general, dels equips que operen a altes temperatures. S'utilitzen en els processos de producció de metalls, vidres i altres ceràmics, tractaments tèrmics, centrals termoelèctriques i nuclears, etc.</p> <p>La majoria de refractaris àcids industrials tenen composicions properes al sistema binari SiO₂/Al₂O₃ Se'n distingeixen diferents tipus segons el contingut d'alúmina.</p> <p><strong>Argila refractària: </strong>Conté 70-80% de SiO₂ i 20-30% de Al₂O₃. Consisteixen en vidre de sílice més mullita (minoritària). Són refractaris de bona resistència mecànica, poc porosos (~10%) i els més econòmics, però la temperatura màxima de treball no pot passar d'uns 1500ºC.</p> </div></div></div></div></fieldset> </div></div><ul class="links inline"><li class="translation_es first last"><a href="/cmematerials/es/content/compacto-34-de-%C3%B3xido-de-aluminio" title="Compacto (34% de óxido de Aluminio)" class="translation-link">Español</a></li> </ul> Tue, 07 May 2013 10:37:16 +0000 editor 42 at http://www.ub.edu/cmematerials http://www.ub.edu/cmematerials/ca/content/compacte-34-d%C3%B2xid-dalumini#comments