Abstract: Silicon oxycarbide porous ceramics have promising application due to its characteristics of high temperature resis-tance, low density, high specific strength, high specific surface area, low thermal conductivity as well as excellent dielectric properties. Pyrolytic ceramization of preceramic polymer precursors has a bright prospect in producing ceramics. Based on a brief introduction to polysiloxanes, this article reviews the research status of preparing silicon oxycarbide porous ceramics from polysiloxanes, with an emphasis on the specific pore structures formed before, during and after pyrolysis. It also discusses some emerging issues in the field.
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2017, Vol. 31 
