The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2014
Filed:
Apr. 12, 2011
Kenji Toda, Niigata, JP;
Mineo Sato, Niigata, JP;
Kazuyoshi Uematsu, Niigata, JP;
Tadashi Ishigaki, Niigata, JP;
Hideo Suda, Tokyo, JP;
Etsuko Minegishi, Tokyo, JP;
Yoshiaki Kudo, Tokyo, JP;
Kenji Toda, Niigata, JP;
Mineo Sato, Niigata, JP;
Kazuyoshi Uematsu, Niigata, JP;
Tadashi Ishigaki, Niigata, JP;
Hideo Suda, Tokyo, JP;
Etsuko Minegishi, Tokyo, JP;
Yoshiaki Kudo, Tokyo, JP;
Lead Chemical Company, Limited, Tokyo, JP;
Niigata University, Niigata, JP;
Abstract
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≦x≦1.9, preferably, 0.8≦x≦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° C. and subjecting the raw material powders to a gas-solid phase reaction at a temperature of 700 to 1700° C.