Niigata University

Lead Chemical Company, Limited

Etsuko Minegishi

Yoshiaki Kudo

Kenji Toda

Hideo Suda

Mineo Sato

Kazuyoshi Uematsu

Tadashi Ishigaki

There are provide a silicate-based phosphor excellent in emission intensity and a manufacturing method of the same. A manufacturing method of a silicate-based phosphor is characterized by: introducing in a vessel raw material powders having a compound containing light-emitting ions selected from at least one of Eu, Ce, Mn, and Tb; and firing the raw material powders while supplying SiO(0.5&#x2266;x&#x2266;1.9, preferably, 0.8&#x2266;x&#x2266;1.2) in a gas phase. The raw material powders preferably further contains at least one of an alkali metal compound, an alkaline-earth metal compound, a magnesium compound, and a rare-earth compound. The silicate-based phosphor is preferably MSiO:Eu(wherein M is one or more selected from a group consisting of Ca, Sr and Ba). The firing is preferably performed by supplying the SiOto the raw material powders in a gas atmosphere at a temperature of 1200 to 1700&#xb0; C. and subjecting the raw material powders to a gas-solid phase reaction at a temperature of 700 to 1700&#xb0; C.

Silicate-based phosphor and manufacturing method of silicate-based phosphor

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Tokyo, Japan

Etsuko Minegishi