Production of silicon carbide filter

Abstract

Abstract PURPOSE:To realize a filter that can burn away deposits by having not only high temp. heat resistance but self-exothermic characteristic. CONSTITUTION:High polymer foam is immersed in silicon carbide slurry to fill and impregnate said slurry into the pores. If necessary, the foam is subjected to impregnating and drying again after drying, whereby skeleton of a desired thickness is formed and is later subjected to sintering, whereby a porous sintered body of silicon carbide (filter) is obtained. The high polymer foam material (impregnation) impregnated with the silicon carbide slurry is first dried, then the impregnation is treated under heating to annihilate the high polymer foam material, whereby a body with skeleton construction is obtained. The body with silicon carbide construction (uncalcined) is then subjected to primary sintering for about 30min -3hr at about 1,900-2,300 deg.C in Ar flow, whereby a porous sintered body is obtained. Said body is subjected to secondary calcination in a high pressure gaseous nitrogen atmosphere of about 1,600-2,100 deg.C and 1-200atm.

Inventors

• 👤 Shunkichi Nozaki
• 👤 野崎　駿吉
• 👤 Yoshinori Narita
• 👤 義則 成田

Bibliographic Details