Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Synthesis of $\beta$-Sialon from Wando Pyrophyllite (2)

완도 납석으로부터 $\beta$-Sialon의 합성 (2)

  • 이홍림 (연세대학교 요업공학과) ;
  • 장병국 (연세대학교 요업공학과) ;
  • 이형복 (홍익공업전문대학 요업과)
  • Published : 1985.05.01
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Abstract

$eta$-Sialon powders were prepared by reduction-nitridation from mixture of Wando pyrophyllite and graphite as a reducing agent at 135$0^{\circ}C$ in 80% $N_2$-20% $H_2$ atmosphere. As the reaction products $Si_2ON_2$, $\beta$-$Si_3N_4$ a--$Si_3N_4$ and $\beta$-SiC were observed. Additive agents of MgO, CaO, $Y_2O_3$ were used for promoting the reduction and nitridiation aeaction. The present study was conducted to investigate the effects of silica-carbon ratio ($SiO_2$/C=weight ratio), raction time gas flow rate pellet size and powder packing on synthesis of $\beta$-Sialon from Wando pyropyllite.

Keywords

References

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