Corundum powder preparation by SHS-method

Corundum powder preparation by SHS-method Phase composition, crystal size development in powder, and microstructure are studied, and data are summarized for specific surface and particle size distribution of corundum powder prepared by self-propagating high-temperature synthesis (SHS) from solutions in relation to the oxidizing agent:fuel molar ratio. A considerable reduction is revealed in intensity of α-Al2O3 phase crystallization with an increase in the amount of fuel to the ratio 1:1:2 and a reduction in crystal size of this phase in powder. A reduction in powder specific surface and formation of powder particles with sizes of 20 – 400 μm with a ratio of 1:1:1.5 is demonstrated. Addition of thiourea with a ratio of 1:1:2 does not facilitate combustion. With a ratio of 1:1:1.5 there is a greater practical yield of corundum powder than with a ratio of 1:1:2. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Corundum powder preparation by SHS-method

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Publisher
Springer US
Copyright
Copyright © 2013 by Springer Science+Business Media New York
Subject
Material Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Methods
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-013-9551-5
Publisher site
See Article on Publisher Site

Abstract

Phase composition, crystal size development in powder, and microstructure are studied, and data are summarized for specific surface and particle size distribution of corundum powder prepared by self-propagating high-temperature synthesis (SHS) from solutions in relation to the oxidizing agent:fuel molar ratio. A considerable reduction is revealed in intensity of α-Al2O3 phase crystallization with an increase in the amount of fuel to the ratio 1:1:2 and a reduction in crystal size of this phase in powder. A reduction in powder specific surface and formation of powder particles with sizes of 20 – 400 μm with a ratio of 1:1:1.5 is demonstrated. Addition of thiourea with a ratio of 1:1:2 does not facilitate combustion. With a ratio of 1:1:1.5 there is a greater practical yield of corundum powder than with a ratio of 1:1:2.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Jul 18, 2013

References

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