Abstract: These surface-modified metal compound particles have metal compound particles the surfaces of which are modified by: at least one first carboxylic acid selected from the group consisting of a methacrylic acid, an acrylic acid, and a propionic acid; and at least one second carboxylic acid selected from the group consisting of a C6-C16 fatty acid and a C7-C32 monovalent carboxylic acid having at least one benzene ring, wherein at least a portion of the first carboxylic acid is a carboxylic acid type in which a hydrogen atom of the carboxy group is not dissociated as an ion.

Abstract: Provided are surface-modified metal compound particles comprising metal compound particles which are surface-modified with one or more types of carboxylic acid selected from a methacrylic acid, an acrylic acid, and a propionic acid, and a 12-hydroxystearic acid, wherein a portion or all of the one or more types of carboxylic acid selected from a methacrylic acid, an acrylic acid, and a propionic acid is a carboxylic acid (protonated) type.

Abstract: These surface-modified metal compound particles have metal compound particles the surfaces of which are modified by: at least one first carboxylic acid selected from the group consisting of a methacrylic acid, an acrylic acid, and a propionic acid; and at least one second carboxylic acid selected from the group consisting of a C6-C16 fatty acid and a C7-C32 monovalent carboxylic acid having at least one benzene ring, wherein at least a portion of the first carboxylic acid is a carboxylic acid type in which a hydrogen atom of the carboxy group is not dissociated as an ion.

Abstract: Provided are surface-modified metal compound particles comprising metal compound particles which are surface-modified with one or more types of carboxylic acid selected from a methacrylic acid, an acrylic acid, and a propionic acid, and a 12-hydroxystearic acid, wherein a portion or all of the one or more types of carboxylic acid selected from a methacrylic acid, an acrylic acid, and a propionic acid is a carboxylic acid (protonated) type.

Abstract: The present invention provides a sol comprising, as a dispersoid, amorphous Zr—O--based particles having a median particle diameter D50 of 50 to 200 nm, so as to enable control of the optimal rheology and the application characteristics of a mixture system incorporating the sol. More specifically, the present invention provides a sol comprising, as a dispersoid, amorphous compound particles containing zirconium and oxygen, the amorphous compound particles having a median diameter in a range of 50 to 200 nm.

Abstract: Disclosed is an inorganic material that can exhibit an excellent photocatalytic gas decomposition function while maintaining an abrasion resistance on a level that is usually required of this type of inorganic materials. The inorganic material includes an inorganic material base and a photocatalyst layer that is formed by firing and is provided on the surface of the inorganic material base, the photocatalyst layer containing: photocatalyst particles; zirconia particles having a BET specific surface area of not less than 10 m2/g or crystalline zirconia particles having a mean crystallite diameter of less than 20 nm; and an alkali silicate. The inorganic material including the photocatalyst layer exhibits a high photocatalytic gas decomposition function while maintaining an abrasion resistance on a level that is usually required of this type of inorganic materials.

Abstract: Disclosed is an inorganic material that can exhibit an excellent photocatalytic gas decomposition function while maintaining an abrasion resistance on a level that is usually required of this type of inorganic materials. The inorganic material includes an inorganic material base and a photocatalyst layer that is formed by firing and is provided on the surface of the inorganic material base, the photocatalyst layer containing: photocatalyst particles; zirconia particles having a BET specific surface area of not less than 10 m2/g or crystalline zirconia particles having a mean crystallite diameter of less than 20 nm; and an alkali silicate. The inorganic material including the photocatalyst layer exhibits a high photocatalytic gas decomposition function while maintaining an abrasion resistance on a level that is usually required of this type of inorganic materials.

Abstract: A sol of the present invention is a sol comprising zirconium oxalate compound as a dispersoid, wherein a mol ratio of oxalic acid to Zr (oxalic acid/Zr) is from 1.2 to 3 and a particle diameter D50 of the dispersoid is from 10 to 100 nm. This sol is produced by adding oxalic acid to a dispersion liquid of zirconium hydroxide, and the addition of oxalic acid is carried out in twice.

Abstract: A sol of the present invention is a sol comprising zirconium oxalate compound as a dispersoid, wherein a mol ratio of oxalic acid to Zr (oxalic acid/Zr) is from 1.2 to 3 and a particle diameter D50 of the dispersoid is from 10 to 100 nm. This sol is produced by adding oxalic acid to a dispersion liquid of zirconium hydroxide, and the addition of oxalic acid is carried out in twice.