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Journal of the Korean Ceramic Society 1985;22(5): 35. |
| 완도 납석으로부터 $beta$-Sialon의 합성 (2) |
| 이홍림, 장병국, 이형복1 |
연세대학교 요업공학과
1홍익공업전문대학 요업과 |
| Synthesis of $beta$-Sialon from Wando Pyrophyllite (2) |
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| ABSTRACT |
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$eta$-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. |
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