| Si-Al-SiO2-NH4F(β-Si3N4)계에서 연소반응에 의한 β-SiAlON분말의 제조 |
| 민현홍, 신창윤, 원창환 |
| 충남대학교 급속응고신소재연구소 |
| Preparation of β-SiAlON Powder by Combustion Reaction in the System of Si-Al-SiO2-NH4F(β-Si3N4) |
| Hyun-Hong Min, Chang-Yun Shin, Chang-Whan Won |
| Engineering Research Center for Rapidly Solidified Materials, Chungnam National University |
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| ABSTRACT |
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The preparation of $beta$-SiAlON powder by SHS in the system of $Si-Al-SiO_2-NH_4F(beta-Si_3N_4)$ was investigated in this study. In the preparation of SiAlON powder, the effect of gas pressure, compositions such as Si, $NH_4F$, beta-Si_3N_4$ and additive in mixture on the reactivity were investigated. At 50 atm of the initial inert gas pressure in reactor, the optimum composition for the preparation of pure $beta$-SiAlON was $3Si+Al+2SiO_2+NH_4F$. The $beta$-SiAlON powder synthesized in this condition was a single phase $beta$-SiAlON with a rod like morphology. ⌊ꄀ Ѐ歡瀱ᔀ胭閜飬ꎼ볭閙谀 |
| Key words:
SHS, Combustion, $\beta$-SiAlON, $NH_4F$, $\beta-Si_3N_4$ |
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