Title:
Color stable manganese dope fluorescent substance
Document Type and Number:
Japanese Patent JP6216761
Kind Code:
B2
Abstract:
A process for preparing color stable Mn +4 doped phosphors includes providing a phosphor of formula I;
A x [MF y ]:Mn +4 I
and contacting the phosphor in particulate form with a saturated solution of a composition of formula II in aqueous hydrofluoric acid;
A x [MF y ];II
wherein
A is Li, Na, K, Rb, Cs, NR 4 or a combination thereof;
M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;
R is H, lower alkyl, or a combination thereof;
x is the absolute value of the charge of the [MF y ] ion; and
y is 5, 6 or 7.
In particular embodiments, M is Si, Ge, Sn, Ti, Zr, or a combination thereof. A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor composition radiationally coupled to the light source, and which includes a color stable Mn +4 doped phosphor.
Inventors:
Anant Attitude Setral
Robert Joseph Lions
Anilda Rajendra Deshpande
Lyudmil Slavchev Griegorov
Robert Joseph Lions
Anilda Rajendra Deshpande
Lyudmil Slavchev Griegorov
Application Number:
JP2015219998A
Publication Date:
October 18, 2017
Filing Date:
November 10, 2015
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
C09K11/61; C09K11/08; H01L33/50
Domestic Patent References:
| JP2011012091A | ||||
| JP2013533363A | ||||
| JP2009280763A | ||||
| JP2010209311A | ||||
| JP5545665B2 | ||||
| JP2014514388A |
Foreign References:
| WO2009119486A1 | ||||
| US20100142189 | ||||
| US8252613 | ||||
| EP2688978A1 | ||||
| WO2012128837A1 | ||||
| CN103429701A | ||||
| KR1020140019400B1 |
Attorney, Agent or Firm:
Arakawa Satoshi
Hirokazu Ogura
Toshihisa Kurokawa
Takuto Tanaka
Hirokazu Ogura
Toshihisa Kurokawa
Takuto Tanaka
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