POROUS CERAMIC AND PROCESS FOR PRODUCING THE SAME.

摘要

A porous ceramic mainly comprising silicon carbide or nitride, having strength, heat resistance and thermal shock resistance superior to the conventional products, containing many micropores wherein the pore diameter is 1 mu m or less and the porosity is 35% or above, and having a flexural strength of 100 MPa or above. The production process comprises mixing a silicon oligomer capable of yielding silicon carbide or nitride by firing with powdery silicon carbide, silicon nitride or other ceramic each having an average particle diameter of 1.0 mu m or less, forming the resultant mixture, and sintering the formed mixture in a suitable atmosphere at 1,200 DEG C or above.