Abstract: A method for manufacturing a silica sol according to an embodiment of the present invention includes: a step of preparing a silica sol reaction liquid by hydrolyzing and polycondensing an alkoxysilane or a condensate thereof using an alkali catalyst in a solvent; and at least one of a step of concentrating the silica sol reaction liquid by an ultrasonic atomization separation method and a step of replacing the silica sol reaction liquid with water by the ultrasonic atomization separation method.

Abstract: The present invention enables to provide plate-like titanium pyrophosphate, having both high uniformity in size and specific particle shape, which is expected to be highly useful.

Abstract: Provided is a powder having a high transmittance that is suitable as a filler for optical materials and resins for which transparency is demanded. The powder of the present invention includes crystalline plate-shaped titanium phosphate particles, in which a ratio of particles having a particle diameter of 0.52 ?m or more to 0.87 ?m or less is 7.0% by mass or less.

Abstract: Provided is a method for producing a silica sol. A gel-like material cannot be generated and highly associated silica particles can be obtained. A method for producing a silica sol comprises a step of making a reaction liquid by mixing liquid (A) comprising an alkaline catalyst, water, a first organic solvent and silica particles for association with liquid (B) comprising at least one of tetramethoxysilane and a condensate thereof and a second organic solvent, wherein during the mixing, an addition rate of the liquid (B) is 8.5×10?4 to 5.6×10?3 (mol of silicon atoms in liquid (B)/mol of water in liquid (A)) per minute.

Abstract: Provided is a soft focus filler excellent in both transmittance and haze. The soft focus filler of the present invention includes a powder including plate-shaped crystal particles of titanium phosphate.

Abstract: A titanium phosphate powder containing plate-like particles with a reduced content ratio of byproducts other than the plate-like particles, and exhibiting crystallinity of titanium phosphate represented by a chemical formula Ti(HPO4)2·nH2O (0?n?1) is provided in the present disclosure. The present disclosure relates to a method for producing a titanium phosphate powder exhibiting crystallinity of titanium phosphate represented by a chemical formula Ti(HPO4)2·nH2O (0?n?1), and containing plate-like particles, the method comprising putting an acidic raw material aqueous solution containing phosphorus and titanium in a sealed vessel, and storing the sealed vessel containing the raw material aqueous solution for a period of 2 hours or more, with the ambient temperature of the sealed vessel maintained under a constant temperature condition within a range of 40° C. or more and less than 100° C.

Abstract: Provided is a white pigment for cosmetics, and the white pigment has a higher function as a base pigment than that of titanium oxide. A white pigment for cosmetics of the present invention includes a titanium phosphate powder having a whiteness of 92.91 or more as determined in accordance with JIS Z 8715.

Abstract: Provided is a powder having excellent hiding power, such that the powder can be used in place of titanium dioxide as a white pigment in a cosmetic. The powder of the present invention includes plate-shaped crystal particles, the volume D50% diameter thereof is 0.7 ?m or more and 8.0 ?m or less, and a coefficient of variation (CV value) of a primary particle diameter is 1.0 or less.

Abstract: The present invention provides a means capable of further improving stability and washability under acidic conditions. The present invention is sulfonic acid-modified colloidal silica having an amount of sulfonic acid groups per 1 g of particles of 1.5 ?mol/g or more and 13.0 ?mol/g or less.

Abstract: The present invention provides a means capable of suppressing the formation of fine particles in a method for producing a silica sol.

Abstract: Provided is a white pigment for cosmetics capable of giving a cosmetic having an excellent performance smoothly applicable onto the skin. A white pigment for cosmetics of the present invention includes a titanium phosphate powder, the titanium phosphate powder includes crystal particles of titanium phosphate, and the titanium phosphate powder has an average friction coefficient (MIU) of less than 1.45.

Abstract: Provided are a dispersion for a silicon carbide sintered body having a small environmental load, high dispersibility, and excellent temporal stability, and a manufacturing method thereof. The dispersion is a dispersion for a silicon carbide sintered body, containing: silicon carbide particles; boron nitride particles; a resin having a hydroxyl group; and water, wherein the dispersion has a pH at 25° C. of less than or equal to 7.0, and the silicon carbide particles and the boron nitride particles have charges of the same sign. The dispersion is manufactured by a manufacturing method of a dispersion for a silicon carbide sintered body, including a mixing step of mixing a water dispersion containing silicon carbide particles, a water dispersion containing boron nitride particles, and an aqueous solution containing a resin having a hydroxyl group.

Abstract: The present invention provides means capable of imparting high temporal stability to a hardening aid solution which serves as a raw material and capable of imparting high strength and high quality stability to a hardened body of the self-hardening material, in the hardened body of the self-hardening material that contains a ceramic powder containing Si element at least on the surface thereof.

Abstract: Provided is a white pigment for cosmetics capable of giving a cosmetic that gives a coating film having less stickiness and higher long-lasting properties. A white pigment for cosmetics of the present invention includes a titanium phosphate powder, the titanium phosphate powder includes crystal particles of titanium phosphate, and a ratio (oil absorption value/specific surface area) of an oil absorption value (ml/100 g) to a specific surface area (m2/g) of the crystal particles is 2.0 or more.

Abstract: The present invention provides a means capable of suppressing the formation of fine particles in a method for producing a silica sol.

Abstract: The surface-modified colloidal silica according to an aspect of the present invention contains colloidal silica, and a surface-modifying group for modifying a surface of the colloidal silica, which has a polyoxyalkylene chain having a weight average molecular weight of 20,000 or more.

Abstract: A method for increasing the specific surface area of titanium phosphate plate-shaped particles of this invention includes: obtaining a liquid in a state where a powder containing titanium phosphate plate-shaped particles is dispersed in an aqueous alkaline solution.

Abstract: To provide modified colloidal silica capable of improving the stability of the polishing speed with time when used as abrasive grains in a polishing composition for polishing a polishing object that contains a material to which charged modified colloidal silica easily adheres, such as a SiN wafer, and to provide a method for producing the modified colloidal silica. Modified colloidal silica, being obtained by modifying raw colloidal silica, wherein the raw colloidal silica has a number distribution ratio of 10% or less of microparticles having a particle size of 40% or less relative to a volume average particle size based on Heywood diameter (equivalent circle diameter) as determined by image analysis using a scanning electron microscope.

Abstract: The present invention provides a means capable of suppressing the formation of fine particles in a method for producing a silica sol.

Abstract: To provide modified colloidal silica capable of improving the stability of the polishing speed with time when used as abrasive grains in a polishing composition for polishing a polishing object that contains a material to which charged modified colloidal silica easily adheres, such as a SiN wafer, and to provide a method for producing the modified colloidal silica. Modified colloidal silica, being obtained by modifying raw colloidal silica, wherein the raw colloidal silica has a number distribution ratio of 10% or less of microparticles having a particle size of 40% or less relative to a volume average particle size based on Heywood diameter (equivalent circle diameter) as determined by image analysis using a scanning electron microscope.