http://www.ub.edu/cmematerials/ca/taxocsv0/pyrex ca http://www.ub.edu/cmematerials/ca/content/vidre-pyrex <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/vidre" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Vidre</a></div><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/especial" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Especial</a></div><div class="field-item odd"><a href="/cmematerials/ca/taxocsv0/borosilicat" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Borosilicat</a></div><div class="field-item even"><a href="/cmematerials/ca/taxocsv0/pyrex" typeof="skos:Concept" property="rdfs:label skos:prefLabel">Pyrex</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>Òxids formadors.</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 vidre pyrex obtinguda per FRX és:</p> <table border="1" cellpadding="1" cellspacing="1" style="width: 500px;"><tbody><tr><td>Component</td> <td>%</td> </tr><tr><td>SiO₂</td> <td>79</td> </tr><tr><td>B₂O₃</td> <td>13</td> </tr><tr><td>Na₂O</td> <td>3,8</td> </tr><tr><td>Al₂O₃</td> <td>2,3</td> </tr></tbody></table><p><strong style="line-height: 1.6em;">Productes :</strong><span style="line-height: 1.6em;"> Fase amorfa.</span></p> </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/633" 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/Vidre%20pyrex1.jpg" width="640" height="480" alt="" title="Macrograsfia Nº1 (x7.5)" /></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/634" 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/Vidre%20pyrex2.jpg" width="640" height="480" 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 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/635" 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/Vidre%20pyrex3.jpg" width="640" height="480" alt="" title="Macrografia Nº3 (x7)" /></div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> <fieldset class="field-group-tab group-prgenerals collapsible collapsed form-wrapper" id="node_materials_rss_group_prgenerals"><legend><span class="fieldset-legend">Propietats generals</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-densitat field-type-text field-label-above"><div class="field-label">Densitat:&nbsp;</div><div class="field-items"><div class="field-item even"><p>2.23 - 2.53 g/cm³</p> </div></div></div><div class="field field-name-field-generals-observa field-type-text-long field-label-above"><div class="field-label">Observacions:&nbsp;</div><div class="field-items"><div class="field-item even"><p>Temperatura de transició vitrea: 450 - 602 ºC</p> </div></div></div></div></fieldset> <fieldset class="field-group-tab group-prmecaniques collapsible collapsed form-wrapper" id="node_materials_rss_group_prmecaniques"><legend><span class="fieldset-legend">Propietats mecàniques</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-modul-elastic field-type-text field-label-above"><div class="field-label">Mòdul elàstic (GPa):&nbsp;</div><div class="field-items"><div class="field-item even"><p>61 - 64 GPa</p> </div></div></div><div class="field field-name-field-relacio-poisson field-type-text field-label-above"><div class="field-label">Coeficient de Poisson:&nbsp;</div><div class="field-items"><div class="field-item even"><p>0.20 - 0.22</p> </div></div></div><div class="field field-name-field-resis-mec-compressio field-type-text field-label-above"><div class="field-label">Resistència mecànica a compressió:&nbsp;</div><div class="field-items"><div class="field-item even"><p> 264 - 384 MPa</p> </div></div></div><div class="field field-name-field-resis-mec-flexio field-type-text field-label-above"><div class="field-label">Resistència mecànica a flexió(MPa):&nbsp;</div><div class="field-items"><div class="field-item even"><p>0.64-0.682 MPa (200ºC), 0.668 (400ºC), 0.619 (600ºC)</p> </div></div></div><div class="field field-name-field-tenacitat-a-fractura field-type-text field-label-above"><div class="field-label">Tenacitat a fractura (KIc):&nbsp;</div><div class="field-items"><div class="field-item even"><p>0.5 - 0.7 MPa·m^1/2</p> </div></div></div><div class="field field-name-field-duresa field-type-tablefield field-label-above"><div class="field-label">Duresa:&nbsp;</div><div class="field-items"><div class="field-item even"><div id="tablefield-wrapper-0" class="tablefield-wrapper"><table id="tablefield-0" class="tablefield sticky-enabled"> <thead><tr><th class="row_0 col_0"><p>A la temperatura de:</p> </th><th class="row_0 col_1"><p>Knoop KHN₁₀₀</p> </th> </tr></thead> <tbody> <tr class="odd"><td class="row_1 col_0"><p>T_amb</p> </td><td class="row_1 col_1"><p>418 kg/mm²</p> </td> </tr> </tbody> </table> </div></div></div></div><div class="field field-name-field-observaciones-pro-mecan 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>Mòdul de fractura : 69 MPa</p> </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-resistivitat-especifica field-type-tablefield field-label-above"><div class="field-label">Resistivitat especifica:&nbsp;</div><div class="field-items"><div class="field-item even"><div id="tablefield-wrapper-0" class="tablefield-wrapper"><table id="tablefield-0" class="tablefield sticky-enabled"> <thead><tr><th class="row_0 col_0"><p>A la temperatura de:</p> </th><th class="row_0 col_1"><p>Resistivitat especifica</p> </th> </tr></thead> <tbody> <tr class="odd"><td class="row_1 col_0"><p>T_amb</p> </td><td class="row_1 col_1"><p>10¹³ Ω·m</p> </td> </tr> </tbody> </table> </div></div></div></div><div class="field field-name-field-constant-diel-ctrica field-type-tablefield field-label-above"><div class="field-label">Constant dielèctrica:&nbsp;</div><div class="field-items"><div class="field-item even"><div id="tablefield-wrapper-0" class="tablefield-wrapper"><table id="tablefield-0" class="tablefield sticky-enabled"> <thead><tr><th class="row_0 col_0"><p>A les condicions de:</p> </th><th class="row_0 col_1"><p>Constant dielèctrica</p> </th> </tr></thead> <tbody> <tr class="odd"><td class="row_1 col_0"><p>1 MHz i 20 ºC</p> </td><td class="row_1 col_1"><p>4.6 - 5.1</p> </td> </tr> </tbody> </table> </div></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-coeficient-expan-lineal field-type-tablefield field-label-above"><div class="field-label">Coeficient de dilatació tèrmica lineal:&nbsp;</div><div class="field-items"><div class="field-item even"><div id="tablefield-wrapper-0" class="tablefield-wrapper"><table id="tablefield-0" class="tablefield sticky-enabled"> <thead><tr><th class="row_0 col_0"><p>A la temperatura de:</p> </th><th class="row_0 col_1"><p>Coeficient de dilatació tèrmica lineal</p> </th> </tr></thead> <tbody> <tr class="odd"><td class="row_1 col_0"><p>0 - 300 ºC</p> </td><td class="row_1 col_1"><p>3.2 - 4·10^-6 /ºC </p> </td> </tr> </tbody> </table> </div></div></div></div><div class="field field-name-field-conductivitat-termica field-type-tablefield field-label-above"><div class="field-label">Conductivitat tèrmica:&nbsp;</div><div class="field-items"><div class="field-item even"><div id="tablefield-wrapper-0" class="tablefield-wrapper"><table id="tablefield-0" class="tablefield sticky-enabled"> <thead><tr><th class="row_0 col_0"><p>A la temperatura de:</p> </th><th class="row_0 col_1"><p>Conductivitat tèrmica</p> </th> </tr></thead> <tbody> <tr class="odd"><td class="row_1 col_0"><p>T_amb</p> </td><td class="row_1 col_1"><p>1.0 - 1.3 W/m·K</p> </td> </tr> </tbody> </table> </div></div></div></div><div class="field field-name-field-capacitat-calorifica-espec field-type-tablefield field-label-above"><div class="field-label">Capacitat calorífica específica:&nbsp;</div><div class="field-items"><div class="field-item even"><div id="tablefield-wrapper-0" class="tablefield-wrapper"><table id="tablefield-0" class="tablefield sticky-enabled"> <thead><tr><th class="row_0 col_0"><p>A la temperatura de:</p> </th><th class="row_0 col_1"><p>Capacitat calorífica específica</p> </th> </tr></thead> <tbody> <tr class="odd"><td class="row_1 col_0"><p>20ºC</p> </td><td class="row_1 col_1"><p>750 j/KgºC </p> </td> </tr> </tbody> </table> </div></div></div></div></div></fieldset> <fieldset class="field-group-tab group-proptiques collapsible collapsed form-wrapper" id="node_materials_rss_group_proptiques"><legend><span class="fieldset-legend">Propietats òptiques</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-index-de-refraccio field-type-text field-label-above"><div class="field-label">Índex de refracció:&nbsp;</div><div class="field-items"><div class="field-item even"><p> 1.47 - 1.51</p> </div></div></div><div class="field field-name-field-observaciones-prop-optique 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>El vidre pyrex transmet la gama de llum visible del espectre i pot ser utilitzada prop del ultravioleta, el que el fa ideal per treballs en el camp de la fotoquímica.</p> </div></div></div></div></fieldset> <fieldset class="field-group-htab group-prtecnologiques collapsible collapsed form-wrapper" id="node_materials_rss_group_prtecnologiques"><legend><span class="fieldset-legend">Propietats tecnològiques</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-obs-prop-tecn 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 la corrosió: elevada</p> <p>Resistència al xoc tèrmic: bona</p> </div></div></div></div></fieldset> <fieldset class="field-group-htab group-prquimiques collapsible collapsed form-wrapper" id="node_materials_rss_group_prquimiques"><legend><span class="fieldset-legend">Propietats químiques</span></legend><div class="fieldset-wrapper"><div class="field field-name-field-obs-prop-quimi 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>El vidre pyrex ofereix gran resistència química a l'aigua, àcids, solucions de sal i dissolvents orgànics. També té una moderada resistència a les solucions alcalines.</p> <p>Les excepcions són l'àcid fluorhídric, àcid fosfòric calent concentrat i les solucions alcalines fortes que poden causar corrosions apreciables al vidre.</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/636" 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/Vidre%20pyrex.jpg" width="640" height="512" 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>Diagrama del procés d'obtenció del vidre pyrex</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-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"><div class="entity entity-field-collection-item field-collection-item-field-g-ima-aplicacions clearfix" about="/cmematerials/ca/field-collection/field-g-ima-aplicacions/637" 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/Vidre%20pyrex1.jpg" width="3264" height="2448" 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>Material de Laboratori</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-ima-aplicacions clearfix" about="/cmematerials/ca/field-collection/field-g-ima-aplicacions/638" 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/Vidre%20pyrex2.JPG" width="640" height="512" 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>Estris de cuina</p> </div></div></div> </div> </div> </div></div></div></div></div></div></fieldset> </div></div> Fri, 31 May 2013 09:49:33 +0000 editor 108 at http://www.ub.edu/cmematerials http://www.ub.edu/cmematerials/ca/content/vidre-pyrex#comments