Patent ID: 7381362

Claim:
A method for producing a ceramic porous material, comprising: preparing a bubbly slurry by mixing and whipping a ceramic powder, a liquid medium, a forming agent and a gellation main agent, and optionally a dispersing agent, adding and mixing a gellation sub agent to the bubbly slurry, pouring the slurry into a mold to obtain a gellation product, drying the gellation product to form a compact having a three dimensional network skeleton structure with a large number of substantially spherical adjacent cells communicating with each other via communication holes, sintering or firing the compact directly to obtain a sintered or fired product, or temporarily baking (calcinating) the compact and then sintering and firing the same to obtain a sintered or fired product, wherein a rim of each communication hole in the compact, the temporarily baked product or the sintered or fired product is eliminated mechanically; wherein said rim of each communication hole is eliminated by permeating a liquid or a gel with a hard fine particle dispersed through the compact, the temporarily baked product, or the sintered or fired product.