Processing of closed-cell silicon oxycarbide foams from a preceramic polymer

A novel processing route for fabricating closed-cell ceramic foams has been developed. The strategy for making the ceramic foams involves: (i) forming some shapes using a mixture of preceramic polymer and expandable microspheres by a conventional ceramic forming method, (ii) foaming the compact by h...

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Bibliographic Details
Published in:Journal of materials science 2004-09, Vol.39 (18), p.5647-5652
Main Authors: KIM, Young-Wook, KIM, Shin-Han, KIM, Hai-Doo, PARK, Chul B
Format: Article
Language:English
Subjects:
Aerosols
Aerosols and foams
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Ceramics
Chemical industry and chemicals
Chemistry
Colloidal state and disperse state
Crosslinking
Exact sciences and technology
Foaming
General and physical chemistry
Materials science
Microspheres
Miscellaneous
Oxycarbides
Plastic foam
Polymers
Porosity
Pyrolysis
Technical ceramics
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Summary:A novel processing route for fabricating closed-cell ceramic foams has been developed. The strategy for making the ceramic foams involves: (i) forming some shapes using a mixture of preceramic polymer and expandable microspheres by a conventional ceramic forming method, (ii) foaming the compact by heating, (iii) cross-linking the foamed body, and (iv) transforming the foamed body into ceramic foams by pyrolysis. By controlling the microsphere content and the pyrolysis temperature, it was possible to adjust the porosity ranging from 56 to 85%.
ISSN:0022-2461
1573-4803
DOI:10.1023/b:jmsc.0000040071.55240.85