Preparation of Al2O3 and Y2O3-coated SiC Composite Particles

Abstract

Abstract: Al₂O₃and Y₂O₃-coated SiC composite particles were prepared from SiC coated uniformly with Al(OH)₃ and Y(OH)₃ by
heterogeneous nucleation process. The IEP of as-received SiC is pH 3.4, that of Al(OH)₃-coated SiC shift to pH 7.3. When Al(OH)₃-coated
SiC composite particles were coated with Y(OH)₃, its IEP is about pH 8.6. In addition, the viscosity behavior of SiC was changed via coating. The
coating ratio is over 95% according to the results of hydrochloric acid titration, that is, 95% of added coating materials can be coated on the surfaces of SiC
particles by heterogeneous nucleation process.

Key words: coating, heterogeneous nucleation precess, SiC composite particles, coating ratio

CLC Number:

TQ163

ZHANG Ju-Xian,YANG Jing-Yi,GAO Long-Qiao,HOU Yao-Yong,LI Fa. Preparation of Al₂O₃ and Y₂O₃-coated SiC Composite Particles[J]. Journal of Inorganic Materials.

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Preparation of Al₂O₃ and Y₂O₃-coated SiC Composite Particles

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