| 摘要 |
PURPOSE:To obtain a purifying body for exhaust gas causing cracks scarcely and having improved thermal characteristics by covering the external surface of a porous ceramic body with a nonporous ceramic film having at least one slit on the surface. CONSTITUTION:The purifying body 1 for exhaust gas is constituted of a cellular structure having three-dimensional network provided with internal communicating spaces. The purifying body consists of a porous ceramic body 2 formed to an approximately elliptic cylinder as a whole, and a nonporous ceramic film 3 covering the external surface of the porous ceramic body 2 forming two uncovered faces 2a, 2b respectively on two specified parts of the porous ceramic body 2. Slits 4 comprising recessed grooves are formed on the surface of the ceramic film 3. Preferred distance between each slit is 0.4-20cm, and preferred thickness of the ceramic film is 0.05-3mm., and preferred depth of the slit is >=1/10 basing on the thickness of the film.
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