Ceramic porous bodies
AssigneeBridgestone Tire Company Limited
InventorTsuneaki Narumiya
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Abstract
A ceramic porous body useful as a filtering material for molten metal is disclosed. The ceramic porous body is formed by covering surfaces of cell strands of a ceramic porous body skeleton consisting essentially of silica, alumina and magnesia and having a bulk specific gravity of 0.3-0.6 with an activation layer consisting of 3-40% by weight per the weight of the skeleton of an activated alumina and 0.5-10% by weight of a flux for aluminum and has an average diameter of interconnected voids of 0.3-5.0 mm, a pressure loss of 0.3-30 mm as a water-gauge pressure when passing air through the body of 1 cm thick at a rate of 1 m/sec., a microsurface area of not less than 10 m.sup.2 /g and a porosity of 75-95%.
Claims2
A ceramic porous body useful as a filtering material for molten metal and having a three-dimensional network cellular structure with a plurality of interconnected voids without clogging in any direction, characterized in that said ceramic porous body is formed by covering surfaces of cell strands of a ceramic porous body skeleton consisting essentially of silica, alumina and magnesia and having a bulk specific gravity of 0.3-0.6 with an activation layer consisting of 3-40% by weight per the weight of the skeleton of an activated alumina and 0.5-10% by weight of a flux for aluminum and has an average diameter of said interconnected voids of 0.3-5.0 mm, a pressure loss of 0.3-30 mm as a water-gauge pressure when passing air through the body of 1 cm thick at a rate of 1 m/sec., a microsurface area of not less than 10 m.sup.2 /g, and a porosity of 75-95%.
Dependencies are inferred from the claim text.