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Effect of Acid on the Coating of Boehmite onto Silicon Carbide Particles in Aqueous Suspensions
Author(s) -
Yang ChiaYi,
Shih WeiHeng
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.1999.tb20081.x
Subject(s) - boehmite , coating , alkoxide , silicon carbide , aluminium , aqueous solution , materials science , chemical engineering , aluminum oxide , oxide , aluminium oxides , carbide , silicon , sol gel , inorganic chemistry , chemistry , metallurgy , composite material , nanotechnology , organic chemistry , catalysis , engineering
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.