Publication number: 20150315462
Abstract: A process for preparing a Mn4+ doped phosphor of formula I Ax[MFy]:Mn+4??I includes contacting a mixture of a compound of formula Ax[MFy], a compound of formula AX, and a Mn+n source comprising a fluoromanganese compound, with a fluorine-containing oxidizing agent in gaseous form, at an elevated temperature, to form the Mn4+ doped phosphor; wherein A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; X is F, Cl, Br, I, HF2, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; y is 5, 6 or 7; and n is 2, 3, or 4.
Type:
Application
Filed:
May 1, 2014
Publication date:
November 5, 2015
Applicant:
GENERAL ELECTRIC COMPANY
Inventors:
James Edward Murphy, Robert Joseph Lyons, Anant Achyut Setlur, JR.
Publication number: 20150315461
Abstract: A process for preparing a Mn4+ doped phosphor of formula I Ax[MFy]:Mn+4??I includes combining in an acidic solution, an A+ cation, an anion of formula MFy, and a Mnn+ source comprising a fluoromanganese compound, precipitating a Mnn+ containing phosphor precursor from the acidic solution, and contacting the Mnn+ containing phosphor precursor with a fluorine-containing oxidizing agent in gaseous form, at an elevated temperature, to form the Mn4+ doped phosphor; wherein A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is the absolute value of the charge of the [MFy] ion; y is 5, 6 or 7; and n is 2 or 3.
Type:
Application
Filed:
May 1, 2014
Publication date:
November 5, 2015
Applicant:
GENERAL ELECTRIC COMPANY
Inventors:
Robert Joseph Lyons, James Edward Murphy, Anant Achyut Setlur, Jr.