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Preparation of SiC particles coated with alumina hydrate: Effect of reaction condition on particle coalescence |
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| Authors: | H Nakamura M Yoshinaga S Nagashima A Kato |
| Affiliation: | a Inorganic Materials Department, Kyushu National Industrial Research Institute, AIST, Shuku-machi, Tosu-shi 841, Japan b Department of Chemical Science and Technology, Faculty of Engineering, Kyushu University, Fukuoka 812, Japan |
| Abstract: | Alumina-hydrate-coated SiC particles were prepared via a homogeneous precipitation method using urea, and the conditions for uniform coating and less coalescence of the particles were investigated. Coalescence of coated particles could be said to occur by collision and agglomeration followed by deposition of alumina hydrate on the agglomerated particles. Coalescence of coated particles was suppressed by use of low reaction temperature, low concentration of aluminium sulfate, high concentration of urea, intensive stirring, and a flow reactor. |
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