Interreaction Between Al2O3 and a CaO-Al2O3 Melt |
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| Authors: | LUTGARD C. DE JONGHE HERBERT SCHMID MEI CHANG |
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| Affiliation: | Materials and Molecular Research Division, Lawrence Berkeley Laboratory, and Department of Materials Science and Mineral Engineering, University of California at Berkeley, Berkeley, California 94720 |
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| Abstract: | Poly crystalline and single-crystalline α-alumina were reacted with a eutectic CaO-Al2O3 melt at 1530°C. A reaction zone develops in which a strongly textured CA6 layer, as well as a CA2 layer, forms, with a remaining layer of unreacted CaO-AI2O3 melt. Silica, an impurity in the α-alumina, is rejected by the advancing CA6 phase and accumulates as calcium alumino-silicates in channels that assist in the reaction as fast transport paths. Reaction mechanisms and welding are briefly discussed. |
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