Shoei Chemical Inc.

Seiyu Teruya

Kazuro Nagashima

Masayuki Maekawa

Kousuke Nishimura

Takamasa Imai

Fujio Amada

Junichi Ozawa

A binder resin for an inorganic particle-dispersed paste that excels in both printability and adhesiveness and such an inorganic particle-dispersed paste are provided. The resin includes a mixture in which a polyvinyl acetal and a cellulose derivative are mixed so as to satisfy 0.2&#x2264;X/(X+Y)&#x2264;0.8, where X and Y stand for parts by mass of the polyvinyl acetal and the cellulose derivative, respectively. When a paste is formulated by mixing and kneading the resin with spherical nickel particles with an average particle diameter of 0.3 &#x3bc;m, barium titanate particles with an average particle diameter of 0.05 &#x3bc;m, a nonionic surfactant, dihydroterpineol, and mineral spirit at the prescribed mixing ratio, the paste has prescribed rheological characteristics.

Binder resin for inorganic particle-dispersed pastes and inorganic particle-dispersed paste

A method of manufacturing a highly crystallized phosphor powder, comprising: making a raw material solution containing metal elements and/or semimetal elements that will be constituents of the phosphor into fine liquid droplets, subjecting the liquid droplets to decomposition by heating at a temperature of 500 to 1800&#xb0; C. to produce hollow precursor particles and/or porous precursor particles, heating the precursor particles to crystallize the precursor particles while maintaining the hollow or porous form, and grinding the crystallized particles down to a predetermined particle size. The obtained phosphor powder is a high luminance inorganic phosphor powder that is extremely fine, and yet has few defects on the surface of or inside the powder, and hence has excellent crystallinity and light emission characteristics, and provides a phosphor composition useful for producing a phosphor layer with high coverage and high luminance of light emission.

Method of manufacturing phosphor powder, phosphor powder, and phosphor composition

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Tosu, Japan

Seiyu Teruya