Porous article and method of producing the same
AssigneeSumitomo Osaka Cement Co., Ltd.
InventorKeijiro Shigeru
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Abstract
A porous article is obtained by filling pores of at least one principal surface of a porous body which is formed of an inorganic material, with a mixture containing metal oxide particles and an alkaline silicate, in which the filled mixture is coated by a film containing a hydrated compound of zirconium and a silicate. According to this porous article, an effect of preventing surface contamination is superior, and alkali resistance and acid resistance are superior. In addition, a production treatment of the porous article can be performed at room temperature or at a relatively low temperature of 100° C. or lower. Therefore, the production cost can be significantly reduced.
Claims9
A porous article comprising a porous body, which is formed of an inorganic material, having at least one principal surface being filled with a mixture containing a metal oxide particle and an alkali silicate,
- wherein the filled mixture is coated by a film containing a hydrated compound of zirconium and a silicate.
A method of producing a porous article, the method comprising:
- a first step of coating pores of at least a principal surface of a porous body, which is formed of an inorganic material, with a first mixed solution containing metal oxide particles, an alkaline silicate, and water to fill the pores with the first mixed solution;
- a second step of removing a residual first mixed solution which is not used for filling the pores;
- and
- a third step of further coating the entire surface of the porous body containing the pores, from which the residual first mixed solution is removed, with a second mixed solution containing an aqueous alkaline zirconium carbonate solution and either an aqueous silicate solution or a colloidal silica.
Dependencies are inferred from the claim text.