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http://dx.doi.org/10.4191/KCERS.2007.44.5.184

Synthesis of Microcellular Cordierite Ceramics Derived from a Preceramic Polymer  

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)
Publication Information
Journal of the Korean Ceramic Society / v.44, no.5, 2007 , pp. 184-189 More about this Journal
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
Cordierite; Porous material; Foaming; Porosity;
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