PURPOSE: To provide electroconductive ceramic suitable as a ceramic filter material having improved heat resistance and oxidation resistance.
CONSTITUTION: This electroconductlve ceramic comprises a porous β type silicon carbide containing 1-5wt.% of nitrogen and/or calculated as nitrogen of total of nitrides and having ≤10Ω specific resistance. The electroconductive ceramic is produced by blending silicon carbide powder with water, a deflocculant, an organic binder and an organic blowing agent to prepare a blowing slurry, casting into a mold having water absorption properties, molding, drying/de- fatting and baking under ≥5kg/cm2 nitrogen gas pressure at ≥2,000°C. A ceramic filter comprises the electroconductive ceramic having 5-300μm pore diameter and 30-90 % porosity.
NISHIMURA KOJI
MITSUNAGA TOSHIKATSU
ISOZAKI HIROSHI
