| 摘要 |
A ceramic filter having a good permeability and a superior durability, and a process for manufacturing the same. This filter comprises a porous support (10) made of a ceramic, a fine intermediate layer (4) formed on one surface of said support (10) and comprised of at least one kind of particles selected from particles of SnO2, TiO2, ZrO2 or CeO2 and having a particle diameter of not more than 500 ANGSTROM , and a thin film (5) formed on the surface of said fine intermediate layer (4) and comprised of at least one particles selected from particles of SnO2, TiO2, ZrO2 or CeO2 and having a particle diameter of not more than 300 ANGSTROM and smaller than the particle diameter of the particles that constitute said fine intermediate layer (4). Said porous support comprises a base (1) made of a ceramic, a first intermediate layer (2) formed thereon and having a pore size smaller than said base (1), and a second intermediate layer (3) formed thereon and having a pore size smaller than said first intermediate layer (2) and larger than said fine intermediate layer (4). |
