1987 年 95 巻 1097 号 p. 127-133
A magadiite (layered polysilicate)-polyacrylonitrile (PAN) intercalation compound was first prepared to investigate its potential as a precursor for the synthesis of non-oxide ceramics by carbothermal reduction. Acrylonitrile monomer was intercalated and polymerized in the interlayer space of a C12H25N(CH3)3-magadiite complex. After the cyclization of PAN by the heat treatment in air, the compound was heated in Ar flow for 2h. Above 1300°C, β-SiC was formed without the formation of any crystalline SiO2 phases. Since the reactions of a magadiite-carbon mixture involved the formation of cristobalite, it was shown that SiO2 from magadiite was reduced to form β-SiC without crystallization, which was caused by the presence of PAN in the interlayer space.