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Calcium aluminates are a range of materials obtained by heating calcium oxide and aluminium oxide together at high temperatures. They are encountered in the manufacture of refractories and cements. The stable phases shown in the phase diagram (formed at atmospheric pressure under an atmosphere of normal humidity) are: In addition, other phases include:

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  • Calciumaluminate (de)
  • Calcium aluminates (en)
  • Aluminate de calcium (fr)
  • Алюминаты кальция (ru)
  • 铝酸钙 (zh)
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  • Calciumaluminate sind Verbindungen von Calciumoxid (oder Calciumhydroxid) und Aluminiumoxid (oder Aluminiumhydroxid) von unterschiedlicher Zusammensetzung. Sie spielen in der Bauchemie als reaktive Verbindungen eine große Rolle und sind als wasserfreie Oxide Bestandteil von Zementen. Grundsätzlich gibt es gebrannte (gesinterte) Calciumaluminate und chemisch gefällte Calciumaluminat-Hydrate (Hydroxide). (de)
  • Les aluminates de calcium sont obtenus par chauffage simultané de l'oxyde de calcium CaO et l'oxyde d'aluminium Al2O3 à des températures élevées. On les rencontre dans la fabrication de matériaux réfractaires et des ciments. Les phases stables présentées dans le diagramme de phase formées sous pression atmosphérique et dans des conditions normales d'humidité sont : * l', 3CaO·Al2O3 (C3A) ; * l', 12CaO·7Al2O3 (C12A7) (mayenite) ; * l', CaO·Al2O3 (CA) ; * le , CaO·2Al2O3 (CA2) ; * l', CaO·6Al2O3 (CA6). (fr)
  • Алюминаты кальция — двойные оксиды состава mCaO·nAl2O3, бесцветные кристаллы, взаимодействуют с водой. (ru)
  • 铝酸钙是通过高温共热氧化钙和氧化铝得到的一系列的矿物化合物,广泛用于耐火材料和水泥的制造。 相图中标准状况下的稳定相(1atm下的相对湿度)有: * , 3CaO·Al2O3 (C3A) * , 12CaO·7Al2O3 (C12A7) * 偏铝酸钙, CaO·Al2O3 (CA) * , CaO·2Al2O3 (CA2) * , CaO·6Al2O3 (CA6) 此外,还存在以下相: * , 2CaO·Al2O3 (C2A),只在2500 MPa以上存在。晶体属于正交晶系,密度为3480 kg·m−3。 * , 5CaO·3Al2O3 (C5A3),只在无水、无氧状态下存在。正交晶体,密度3067 kg·m−3。迅速和水反应。 * , 4CaO·3Al2O3 (C4A3),通过4CaO·3Al2O3·3H2O (C4A3H3)脱水形成的。 (zh)
  • Calcium aluminates are a range of materials obtained by heating calcium oxide and aluminium oxide together at high temperatures. They are encountered in the manufacture of refractories and cements. The stable phases shown in the phase diagram (formed at atmospheric pressure under an atmosphere of normal humidity) are: In addition, other phases include: (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/CaAluminatesPhaseDiagram.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Calcium_heptaaluminate_str.png
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  • Calciumaluminate sind Verbindungen von Calciumoxid (oder Calciumhydroxid) und Aluminiumoxid (oder Aluminiumhydroxid) von unterschiedlicher Zusammensetzung. Sie spielen in der Bauchemie als reaktive Verbindungen eine große Rolle und sind als wasserfreie Oxide Bestandteil von Zementen. Grundsätzlich gibt es gebrannte (gesinterte) Calciumaluminate und chemisch gefällte Calciumaluminat-Hydrate (Hydroxide). (de)
  • Calcium aluminates are a range of materials obtained by heating calcium oxide and aluminium oxide together at high temperatures. They are encountered in the manufacture of refractories and cements. The stable phases shown in the phase diagram (formed at atmospheric pressure under an atmosphere of normal humidity) are: * Tricalcium aluminate, 3CaO·Al2O3 (C3A) * Dodecacalcium hepta-aluminate, 12CaO·7Al2O3 (C12A7) (once known as mayenite) * Monocalcium aluminate, CaO·Al2O3 (CA) (occurring in nature as krotite and dmitryivanovite - two polymorphs) * , CaO·2Al2O3 (CA2) (occurring in nature as grossite ) * , CaO·6Al2O3 (CA6) (occurring in nature as hibonite, a representative of magnetoplumbite group) In addition, other phases include: * , 2CaO·Al2O3 (C2A), which exists only at pressures above 2500 MPa. The crystal is orthorhombic, with density 3480 kg·m−3. The natural dicalcium aluminate, brownmillerite, may form at normal pressure but elevated temperature in pyrometamorphic zones, e.g., in burning coal-mining heaps. * , 5CaO·3Al2O3 (C5A3), forms only under an anhydrous and oxygen free atmosphere. The crystal is orthorhombic, with a density of 3067 kg·m−3. It reacts rapidly with water. * , 4CaO·3Al2O3 (C4A3), is a metastable phase formed by dehydrating 4CaO·3Al2O3·3H2O (C4A3H3). (en)
  • Les aluminates de calcium sont obtenus par chauffage simultané de l'oxyde de calcium CaO et l'oxyde d'aluminium Al2O3 à des températures élevées. On les rencontre dans la fabrication de matériaux réfractaires et des ciments. Les phases stables présentées dans le diagramme de phase formées sous pression atmosphérique et dans des conditions normales d'humidité sont : * l', 3CaO·Al2O3 (C3A) ; * l', 12CaO·7Al2O3 (C12A7) (mayenite) ; * l', CaO·Al2O3 (CA) ; * le , CaO·2Al2O3 (CA2) ; * l', CaO·6Al2O3 (CA6). (fr)
  • Алюминаты кальция — двойные оксиды состава mCaO·nAl2O3, бесцветные кристаллы, взаимодействуют с водой. (ru)
  • 铝酸钙是通过高温共热氧化钙和氧化铝得到的一系列的矿物化合物,广泛用于耐火材料和水泥的制造。 相图中标准状况下的稳定相(1atm下的相对湿度)有: * , 3CaO·Al2O3 (C3A) * , 12CaO·7Al2O3 (C12A7) * 偏铝酸钙, CaO·Al2O3 (CA) * , CaO·2Al2O3 (CA2) * , CaO·6Al2O3 (CA6) 此外,还存在以下相: * , 2CaO·Al2O3 (C2A),只在2500 MPa以上存在。晶体属于正交晶系,密度为3480 kg·m−3。 * , 5CaO·3Al2O3 (C5A3),只在无水、无氧状态下存在。正交晶体,密度3067 kg·m−3。迅速和水反应。 * , 4CaO·3Al2O3 (C4A3),通过4CaO·3Al2O3·3H2O (C4A3H3)脱水形成的。 (zh)
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