PURPOSE: To easily obtain the porous ceramics which is high in porosity and sharp in pore size distribution by utilizing a soln. which is gelatinized by a chemical reaction or heating as a molding method for obtaining the porous ceramics.
CONSTITUTION: A slurry prepd. by dispersing ceramics raw materials into the org. high-polymer soln. which is gelatinized by the chemical reaction or heating is prepd. at the time of forming the porous ceramics by molding the ceramics raw materials to granular, fiber, pipe, sheet, film or other shapes and calcining the molding. This slurry is gelatinized by introducing the slurry into a soln. in which an acid or cation of bivalent or higher valency exists or by heating the soln. The porous ceramics which has the uniform structure of the high porosity and high strength and does not change the porous characteristic at a high temp. is extremely easily produced. The material, the soln. of which is gelatinized by the chemical reaction is adequately sodium alginate, ammonium alginate, etc.
KAWAHARA AKIHIKO
KATSUKI HIROAKI
FURUTA SACHIKO
NAKAO HIROSHI
