The Preparation of a Magadiite-Polyacrylonitrile Intercalation Compound and Its Conversion to Silicon Carbide

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  • SUGAHARA Yoshiyuki
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • SUGIMOTO Ken-ichi
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • YANAGISAWA Tsuneo
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • NOMIZU Yasuyuki
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • KURODA Kazuyuki
    Department of Applied Chemistry, School of Science and Engineering, Waseda University
  • KATO Chuzo
    Department of Applied Chemistry, School of Science and Engineering, Waseda University

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  • マガディアイト-ポリアクリロニトリル層間化合物の合成と炭化ケイ素への変換
  • マガディアイト ポリアクリロニトリル ソウカン カゴウブツ ノ ゴウセイ ト

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Abstract

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.

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