Effect of Acid on the Coating of Boehmite onto Silicon Carbide Particles in Aqueous Suspensions

It is shown that the addition of acid in aluminum alkoxide precursor gels is critical to the success of coating aluminum oxide onto SiC particles. For aluminum sec‐butoxide processed at 90°C, the addition of acid dissolves the gel network and facilitates the coating of aluminum oxide on SiC. On the...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1999-02, Vol.82 (2), p.436-440
Main Authors: Yang, Chia-Yi, Shih, Wei-Heng
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
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Summary:It is shown that the addition of acid in aluminum alkoxide precursor gels is critical to the success of coating aluminum oxide onto SiC particles. For aluminum sec‐butoxide processed at 90°C, the addition of acid dissolves the gel network and facilitates the coating of aluminum oxide on SiC. On the other hand, when the coating is performed at room temperature, even with the addition of acids, coating of aluminum oxide is not successful.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.1999.tb20081.x