Effect of topaz on the synthesis of mullite in mixtures of kaolinite and alumina

Effect of topaz on the synthesis of mullite in mixtures of kaolinite and alumina The synthesis of mullite in mixtures of kaolinite and alumina in the presence of small amounts of topaz is studied. Topaz is shown to activate the synthesis of both the primary (from kaolinite) and secondary mullite (through binding silica produced by thermal degradation of kaolinite), decrease the temperature of synthesis by 100°C, and increase the total yield of mullite. Products of the thermal degradation of topaz — mullite and gaseous chemically active fluoride compounds — are shown to play the role of mineralizing agents. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Effect of topaz on the synthesis of mullite in mixtures of kaolinite and alumina

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Publisher
Kluwer Academic Publishers-Consultants Bureau
Copyright
Copyright © 2004 by Springer Science+Business Media, Inc.
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-005-0024-3
Publisher site
See Article on Publisher Site

Abstract

The synthesis of mullite in mixtures of kaolinite and alumina in the presence of small amounts of topaz is studied. Topaz is shown to activate the synthesis of both the primary (from kaolinite) and secondary mullite (through binding silica produced by thermal degradation of kaolinite), decrease the temperature of synthesis by 100°C, and increase the total yield of mullite. Products of the thermal degradation of topaz — mullite and gaseous chemically active fluoride compounds — are shown to play the role of mineralizing agents.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Mar 15, 2005

References

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