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J. Korean Ceram. Soc. > Volume 45(11); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(11): 675.
doi: https://doi.org/10.4191/kcers.2008.45.1.675
Characterization of Pore Structures for Porous Sintered Reaction-Bonded Silicon Nitrides with Varied Pore-Former Content
Young-Jo Park, In-Hyuck Song, Hai-Doo Kim
Engineering Ceramics research Group, Korea Institute of Materials Science
ABSTRACT
The effect of pore former content on both porosity and pore structure was investigated for porous sintered reaction-bonded silicon nitrides (SRBSNs). A spherical PMMA with $d_{50}=8{mu}m$ was employed as a pore-former. Its amount ranged from 0 to 30 part. Porous SRBSNs were fabricated by post-sintering at various temperatures where the porosity was controlled at $12{sim}52%$. The strong tendency of increasing porosity with PMMA content and decreasing porosity with sintering temperature was observed. Measured pore-channel diameter increased $(0.3{rightarrow}1.1{mu}m)$ with both PMMA content and sintering temperature.
Key words: RBSN, SRBSN, Pore channel, Support, Filter, Separation
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