FLUORESCENT FLUORIDE, LIGHT-EMITTING DEVICE, AND PROCESS FOR PRODUCING FLORESCENT FLUORIDE

WIPO Patent Application WO/2017/057671

A1

[Problem] To provide: fluorescent A2SiF6:Mn having high fluorescence intensity and reliability; a high-luminance light-emitting device including this fluorescent substance; and a process for producing this fluorescent substance. [Solution] A process for producing a fluorescent fluoride represented by the general formula A2SiF6:Mn (element A is one or more alkali metal elements comprising potassium), characterized by including the step of preparing an aqueous solution which comprises a solvent and, dissolved therein, both element A and fluorine and the step of adding, to the aqueous solution, solid silicon dioxide and a manganese (Mn) compound which supplies manganese having a valance other than +7. The process is further characterized in that the amount of the manganese compound to be added is in such a range that the fluorescent fluoride has an Mn content of 0.1-1.5 mass%, and that as the silicon dioxide dissolves in the aqueous solution, precipitation of the fluorescent fluoride proceeds.

ICHIKAWA MASAYOSHI (JP)
EMOTO HIDEYUKI (JP)
KONDO RYOSUKE (JP)

PCT/JP2016/079005

April 06, 2017

September 30, 2016

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DENKA COMPANY LTD (JP)

C09K11/61; C09K11/08

WO2015093430A1	2015-06-25
WO2009119486A1	2009-10-01

CN104789214A	2015-07-22
JP2010209311A	2010-09-24
US20150162506A1	2015-06-11
JP2010093132A	2010-04-22
JP2009528429A	2009-08-06
JP2012224536A	2012-11-15
JP2015140424A	2015-08-03
JP2015140425A	2015-08-03

UCHIDA, Naoto (JP)

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