Synthesis of Monodispersed Spherical β‐Silicon Carbide Powder by a Sol‐Gel Process
- 1 July 1990
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 73 (7) , 2107-2110
- https://doi.org/10.1111/j.1151-2916.1990.tb05278.x
Abstract
Monodispersed spherical β‐SiC powder was synthesized by heating spherical gel powder derived from the hydrolysis of a mixture of phenyltriethoxysilane and tetraethyl orthosilicate. The solution was prepared in a beaker and hydrolyzed by NH4OH without stirring. The monodispersed spherical gel powder of submicrometer size was obtained when the added amount of NH4OH was greater than 16 moles per mole of silane plus alkoxide, and it became monodispersed spherical β‐SiC powder by heat‐treating at 1500°C for 4 h in an Ar atmosphere. The SiC content of the powder was 92.6 wt%.Keywords
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