Title:
蛍光体およびこれを用いた発光装置
Document Type and Number:
Japanese Patent JP4836429
Kind Code:
B2
Abstract:
A method for manufacturing a fluorescent substance is provided, which includes mixing a raw material for Eu, a raw material for Si, at least one raw material powder of alkaline earth, and at least one selected from the group consisting of raw materials for La , Gd, Cs, and K to obtain a mixture of raw materials; pre-firing the mixture to obtain a baked material; mixing the baked material and firing in a reducing atmosphere consisting of a mixed gas of N2/H2 to obtain a first fired product; pulverizing the first fired product to obtain a pulverized first fired product; firing the pulverized first fired product in a reducing atmosphere consisting of N2/H2 to obtain a fluorescent substance consisting of an alkaline earth ortho-silicate; pulverizing the fluorescent substance to obtain a fluorescent particle; sieving the fluorescent particle; and providing a surface-covering material on a surface of the fluorescent particle.
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Inventors:
Naomi Shinoda
Masaaki Tamaya
Yoshihito Tsutsui
Kazuaki Otsuka
Ryosuke Hiramatsu
Masaaki Tamaya
Yoshihito Tsutsui
Kazuaki Otsuka
Ryosuke Hiramatsu
Application Number:
JP2004303509A
Publication Date:
December 14, 2011
Filing Date:
October 18, 2004
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Materials Co., Ltd.
Toshiba Materials Co., Ltd.
International Classes:
C09K11/59; C09K11/08; C09K11/79; H01L33/26; H01L33/50; H01L33/56; H01L33/60; H01L33/62
Domestic Patent References:
| JP2004161981A | ||||
| JP2004143408A | ||||
| JP2003277749A | ||||
| JP2005139327A |
Foreign References:
| KR20030060697A | ||||
| KR20040088446A |
Attorney, Agent or Firm:
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Sadao Muramatsu
Ryo Hashimoto