Synthesis of cordierite from bodies based on chrysotile asbestos
Two model raw materials were used: asbestos/alumina/quartz sand and asbestos/kaolin. Firing was performed at various temperatures to clarify the phase equilibria. X-ray and petrographic analses of the fired products were conducted. The possible reactions for each raw materials system were checked, a...
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| Published in: | Glass and ceramics Vol. 47; no. 5; pp. 154 - 157 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
01-05-1990
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| Online Access: | Get full text |
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| Summary: | Two model raw materials were used: asbestos/alumina/quartz sand and asbestos/kaolin. Firing was performed at various temperatures to clarify the phase equilibria. X-ray and petrographic analses of the fired products were conducted. The possible reactions for each raw materials system were checked, and the Gibbs free energy was calculated. Besides cordierite, formation of such phases as sapphire and mullite was observed. The amount of the latter depends on the duration of heating (from 1373 to 1573-1623 K). When selecting the firing cycle in each case, it is necessary to proceed at the maximum possible rate. A technology was developed for producing low-shrinkage, heat-insulating and design ceramics for high-temperature applications. 6 refs. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Translation-2 |
| ISSN: | 0361-7610 1573-8515 |
| DOI: | 10.1007/BF00677816 |