Patent number: 10954438
Abstract: Synthesizing a color stable Mn4+ doped phosphor by contacting a gaseous fluorine-containing oxidizing agent with a precursor of: AaBbCcDdXx:Mn4+; AaiBbiCciDdXxYd:Mn4+; A13G2?m?nMnmMgnLi3F12Op; or AZF4:Mn4+. Where A is Li, Na, K, Rb, Cs, or a combination; B is Be, Mg, Ca, Sr, Ba, or a combination; C is Sc, Y, B, Al, Ga, In, Tl, or a combination; D is Ti, Zr, Hf, Rf, Si, Ge, Sn, Pb, or a combination; X is F or a combination of F and one of Br, Cl, and I; Y is O, or a combination of O and one of S and Se; A1 is Na or K, or a combination; G is Al, B, Sc, Fe, Cr, Ti, In, or a combination; Z is La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc, Y, In, or a combination.
Type:
Grant
Filed:
May 18, 2015
Date of Patent:
March 23, 2021
Assignee:
CURRENT LIGHTING SOLUTIONS, LLC
Inventors:
Srinivas Prasad Sista, Anant Achyut Setlur
Patent number: 10174248
Abstract: A process for treating a luminescent halogen-containing material includes contacting the luminescent halogen-containing material with an atmosphere comprising a halogen-containing oxidizing agent for a period of at least about two hours. The luminescent halogen-containing material has a composition other than (i) Ax[MFy]:Mn4+, where A is Li, Na, K, Rb, Cs, 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; x is the absolute value of the charge of the [MFy] ion; and y is 5, 6 or 7; (ii) Zn2[MF7]:Mn4+, where M is selected from Al, Ga, In, and combinations thereof; (iii) E[MF6]:Mn4+, where E is selected from Mg, Ca, Sr, Ba, Zn, and combinations thereof; and where M is selected from Ge, Si, Sn, Ti, Zr, and combinations thereof; or (iv) Ba0.65Zr0.35F2.70:Mn4+.
Type:
Grant
Filed:
May 18, 2015
Date of Patent:
January 8, 2019
Assignee:
General Electric Company
Inventors:
James Edward Murphy, Anant Achyut Setlur