| 摘要 |
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 beta type silicon carbide containing 1-5wt.% of nitrogen and/or calculated as nitrogen of total of nitrides and having <=10OMEGA 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/cm<2> nitrogen gas pressure at >=2,000 deg.C. A ceramic filter comprises the electroconductive ceramic having 5-300mum pore diameter and 30-90 % porosity. |
