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Synthesis of Microcellular Cordierite Ceramics Derived from a Preceramic Polymer

Preceramic Polymer를 이용한 마이크로셀룰라 코디어라이트 세라믹스의 합성

  • Song, In-Hyuck (Department of Materials Engineering, Korea Institute of Machinery and Materials) ;
  • Kim, Young-Mi (Department of Materials Engineering, Korea Institute of Machinery and Materials) ;
  • Kim, Hai-Doo (Department of Materials Engineering, Korea Institute of Machinery and Materials) ;
  • Kim, Young-Wook (Department of Materials Science and Engineering, The University of Seoul)
  • 송인혁 (한국기계연구원 재료연구부) ;
  • 김영미 (한국기계연구원 재료연구부) ;
  • 김해두 (한국기계연구원 재료연구부) ;
  • 김영욱 (서울시립대학교 신소재공학과)
  • Published : 2007.05.31

Abstract

In this study, a novel-processing route for producing microcellular cordierite ceramics has been developed. The proposed strategy for making the microcellular cordierite ceramics involves three steps: (i) fabricating ceramic-filled preceramic foams by heating a mixture of polysiloxane, expandable microspheres, talc, and alumina in a mold, (ii) cross-linking the foamed body, and (iii) transforming the body into microcellular cordierite ceramics by sintering. Cu jig was used for near net shaping in the foaming step. The experimental variables such as the shape of foaming jig and the content of expendable microsphere were investigated. By controlling the content of expendable microsphere, it was possible to make the porous cordierite ceramics with cell density of ${\sim}1.0{\times}10^9\;cells/cm^3$.

Keywords

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