Fabrication of porous silicon oxycarbide ceramics by foaming polymer liquid and compression molding

Abstract

Porous silicon oxycarbide (SiOC) ceramic with a porosity of 60% and a cell density greater than 104 cells/cm3 was fabricated from a mixture of a polysiloxane and a chemical blowing agent by simple compression molding and subsequent pyrolysis of the polysiloxane. Optimization of processing parameters and selection of appropriate chemical blowing agent for each system will provide a simple processing route for producing highly porous ceramics.