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Journal of the Korean Ceramic Society 1984;21(1): 11. |
| 하동카올린으로부터 $beta$-Sialon의 합성 |
| 이홍림, 이형직 |
| 연세대학교 공과대학 요업공학과 |
| Synthsis of $beta$-Sialon from Hadong Pink Kaolin |
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| ABSTRACT |
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$eta$-Sialon synthesis was investigated via the simultaneous reduction and nitridation of Hadong Pink Kaolin using the graphite as a reducing agent at 135$0^{circ}C$ under 80% $N_2-20%H_2$ atmosphere. When Hadong Pink Kaolin-graphite-silicon nitride seed(molar ratio ; $SiO_2:C:Si_3N_4$=1;3.5:0.05) mixture was heated at 135$0^{circ}C$ for as long as 20h in 80%$N_2-20%H_2$ atmosphere a homogeneous $eta$-Sialon$(Si_{3.5}Al_{2.5}O_{2.5}N_{2.5})$ was mainly formed together with a small amount of $alpha$-$Si_3N_4$ |
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