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

T. V. Vakalova, V. M. Pogrebenkov, A. V. Ivanchenkov, E. V. Alekseev

The Kizhner Research Center

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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.

Original language	English
Pages (from-to)	416-420
Number of pages	5
Journal	Refractories and Industrial Ceramics
Volume	45
Issue number	6
DOIs	https://doi.org/10.1007/s11148-005-0024-3
Publication status	Published - 1 Nov 2004

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ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Cite this

Vakalova, T. V., Pogrebenkov, V. M., Ivanchenkov, A. V., & Alekseev, E. V. (2004). Effect of topaz on the synthesis of mullite in mixtures of kaolinite and alumina. Refractories and Industrial Ceramics, 45(6), 416-420. https://doi.org/10.1007/s11148-005-0024-3

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AU - Vakalova, T. V.

AU - Pogrebenkov, V. M.

AU - Ivanchenkov, A. V.

AU - Alekseev, E. V.

PY - 2004/11/1

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AB - 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.

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10.1007/s11148-005-0024-3