Invention Application
- Patent Title: OXYNITRIDE PHOSPHOR POWDER AND METHOD FOR PRODUCING SAME
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Application No.: US15115943Application Date: 2015-02-02
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Publication No.: US20170174986A1Publication Date: 2017-06-22
- Inventor: Mao Sumino , Takayuki Ueda , Kazuki Iwashita , Masataka Fujinaga , Shinsuke Jida
- Applicant: Ube Industries, Ltd.
- Priority: JP2014-018760 20140203
- International Application: PCT/JP2015/052821 WO 20150202
- Main IPC: C09K11/77
- IPC: C09K11/77 ; H01L33/50 ; C09K11/08

Abstract:
An oxynitride phosphor powder has a fluorescence peak wavelength of 587 to 630 nm and a high external quantum efficiency. A method of producing the oxynitride phosphor powder containing Li at 50 to 10,000 ppm includes mixing silicon nitride powder, a substance serving as an aluminum source, a substance serving as a calcium source and a substance serving as an europium source; firing the mixture at 1500 to 2000° C. in an inert gas atmosphere or a reducing gas atmosphere to obtain a fired oxynitride phosphor composed mainly of Ca-containing α-SiAlON, as an intermediate; and heat treating the fired oxynitride phosphor at a temperature of 1450° C. to less than the firing temperature, in an inert gas atmosphere or in a reducing gas atmosphere in the presence of Li.
Public/Granted literature
- US10125313B2 Oxynitride phosphor powder and method for producing same Public/Granted day:2018-11-13
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