Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Properties of Porous SiC Ceramics Prepared by Wood Template Method

  • Ha, Jung-Soo (School of Advanced Materials Engineering, Andong National University) ;
  • Lim, Byong-Gu (Head Office & Factory, CoorsTek Asia Inc.) ;
  • Doh, Geum-Hyun (Department of Forest Products Technology, Korea Forest Research Institute) ;
  • Kang, In-Aeh (Department of Forest Products Technology, Korea Forest Research Institute) ;
  • Kim, Chang-Sam (Battery Research Center, KIST)
  • Received : 2010.07.06
  • Accepted : 2010.07.16
  • Published : 2010.07.31
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Abstract

Porous SiC samples were prepared with three types of wood (poplar, pine, big cone pine) by simply embedding the wood charcoal in a powder mixture of Si and $SiO_2$ at 1600 and $1700^{\circ}C$. The basic engineering properties such as density, porosity, pore size and distribution, and strength were characterized. The samples showed full conversion to mostly $\beta$-SiC with good retention of the cellular structure of the original wood. More rigid SiC struts were developed for $1700^{\circ}C$. They showed similar bulk density ($0.5{\sim}0.6\;g/cm^3$) and porosity (81~84%) irrespective of the type of wood. The poplar sample showed three pore sizes (1, 8, $60\;{\mu}m$) with a main size of $60\;{\mu}m$. The pine sample showed a single pore size ($20\;{\mu}m$). The big cone pine sample showed two pore sizes (10, $80\;{\mu}m$) with a main size of $10\;{\mu}m$. The bend strength was 2.5 MPa for poplar, 5.7 MPa for pine, 2.8 MPa for big cone pine, indicating higher strength with pine.

Keywords

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