Journal of the Ceramic Society of Japan
Online ISSN : 1882-1022
Print ISSN : 0914-5400
ISSN-L : 0914-5400
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Processing of Porous Silicon Oxycarbide Ceramics from Extruded Blends of Polysiloxane and Polymer Microbead
Young-Wook KIMChunmin WANGChul B. PARK
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2007 Volume 115 Issue 1343 Pages 419-424

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Abstract

Porous silicon oxycarbide (SiOC) ceramics with porosities ranging from 27% to 88% and a cell density higher than 107 cells/cm3 were made from polysiloxane and polymer microbead blends. The polysiloxane and polymer microbeads were compounded directly using a counter-rotated twin-screw extruder with a filamentary die. The obtained specimens were then transformed into porous SiOC ceramics using two different processes: (1) pyrolysis of the extruded blends and (2) foaming of the blends with gaseous carbon dioxide and subsequent pyrolysis. The pyrolysis process resulted in the production of closed-cell SiOC ceramics, while the combined foaming-pyrolysis process resulted in open-cell SiOC ceramics.

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© 2007 The Ceramic Society of Japan
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