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http://dx.doi.org/10.4191/KCERS.2006.43.10.595

Preparation of β-SiAlON Powder by Combustion Reaction in the System of Si-Al-SiO2-NH4F(β-Si3N4)  

Min, Hyun-Hong (Engineering Research Center for Rapidly Solidified Materials, Chungnam National University)
Shin, Chang-Yun (Engineering Research Center for Rapidly Solidified Materials, Chungnam National University)
Won, Chang-Whan (Engineering Research Center for Rapidly Solidified Materials, Chungnam National University)
Publication Information
Journal of the Korean Ceramic Society / v.43, no.10, 2006 , pp. 595-600 More about this Journal
Abstract
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.
Keywords
SHS; Combustion; $\beta$-SiAlON; $NH_4F$; $\beta-Si_3N_4$;
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