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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.121  No.1410 (February) (2013)  >  pp.162-168

Journal of the Ceramic Society of Japan
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Microstructural control of macroporous silicon carbide

1) National Institute of Advanced Industrial Science and Technology (AIST)

Wide range of porosity in 30–90 vol % could be created into silicon carbide by employing carefully selected manufacturing methods. Two fabrication methods have been proposed and reviewed in the present paper: (1) partial sintering of submicrometer-sized silicon carbide particle with a suitable amount of sintering additive, acting as an inhibition of grain growth during sintering; (2) the use of ice crystals, as sacrificial pore formers, formed by freezing a silicon carbide particle dispersed gel body, leading to highly porous silicon carbide after sublimating ice crystals by vacuum drying and subsequently sintering. Depending on the processing route adopted, average pore size could be modulated in the range from 0.03 to 0.70 µm and 30 to 150 µm by partial sintering and gelation freezing, respectively. All fabrication methods proposed are simple, economical and versatile to produce macroporous body with tailored pore architecture and engineering porosity.

Macroporous, Pores, Porosities, Sintering, Gelation and Freeze cast

Received: November 12, 2012
Accepted: December 04, 2012 , Published online: February 01, 2013
Copyright © 2013 The Ceramic Society of Japan



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