公开(公告)号：US20170097426A1

公开(公告)日：2017-04-06

申请号：US15315035

申请日：2015-05-14

Applicant: General Electric Company

Inventor： Srinidhi RAMACHANDRA ,  Wusheng XU ,  Alok Mani SRIVASTAVA ,  Gopi Chandran RAMACHANDRAN ,  Prasanth Kumar NAMMALWAR ,  Sergei Ivanovich DOLINSKY ,  Helene Claire CLIMENT

IPC: G01T1/202 ,  G01T1/20 ,  G01V5/04

CPC classification number: G01T1/2023 ,  G01T1/2018 ,  G01V5/04

Abstract: A method and an apparatus for detecting photons are disclosed. The apparatus includes a scintillator single crystal and an avalanche photodiode coupled to the scintillator single crystal. The scintillator single crystal is at a temperature greater than about 175° C. and at a shock level in a range from about 20 Grms to about 30 Grms. The scintillator single crystal includes a praseodymium doped composition selected from (LaxY1-x)2Si2O7:Pr, ABCl3-yXy:Pr, A2(Li, Na)LaCl6-yXy:Pr, or any combinations thereof. As used herein A is cesium, rubidium, potassium, sodium, or a combination thereof, B is calcium, barium, strontium, magnesium, cadmium, zinc, or a combination thereof, and X is bromine, iodine, or a combination thereof. Further, (0

公开(公告)号：US20180312751A1

公开(公告)日：2018-11-01

申请号：US15768562

申请日：2016-10-18

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Ravikumar HANUMANTHA ,  Prasanth Kumar NAMMALWAR ,  Digamber Gurudas POROB

IPC: C09K11/61

CPC classification number: C09K11/616

Abstract: A process for synthesizing a manganese doped phosphor of formula I: Ax [MFy]:Mn4+ is presented. The process includes contacting a first solution with a second solution and a third solution in the presence of a plurality of inert particles. The first solution and the second solution include a composition of formula II: Ax[MnFy]. The third solution includes a source of M, where A is Li, Na, K, Rb, Cs, or combinations thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or combinations thereof; x is an absolute value of a charge of the [MFy] ion; and y is 5, 6 or 7.

公开(公告)号：US20190292448A1

公开(公告)日：2019-09-26

申请号：US16348763

申请日：2017-11-15

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Digamber Gurudas POROB ,  Prasanth Kumar NAMMALWAR ,  Srinidhi RAMACHANDRA ,  Matthew David BUTTS ,  James Edward MURPHY

IPC: C09K11/02 ,  C09K11/61 ,  H01L33/50

Abstract: A process for coating a phosphor of formula I: Ax[MFy]:Mn4+ includes combining the phosphor of formula I in particulate form with a first solution including a compound of formula II: Ax[MFy] to form a suspension and combining a second solution with the suspension, the second solution including a precursor including an element selected from the group consisting of calcium, strontium, magnesium, yittrium, barium, scandium, lanthanum, and combinations thereof. A population of particles having a core including a phosphor of formula I and a manganese-free composite coating disposed on the core, and a lighting apparatus (10) including the population of particles are also presented.

公开(公告)号：US20180051207A1

公开(公告)日：2018-02-22

申请号：US15555719

申请日：2016-03-02

Applicant: General Electric Company

Inventor： Digamber Gurudas POROB ,  Anant Achyut SETLER ,  Prasanth Kumar NAMMALWAR ,  James Edward MURPHY

IPC: C09K11/57 ,  C09K11/61 ,  C01B33/10 ,  C01G17/00 ,  C01G23/00 ,  C01G45/00 ,  C25B15/08 ,  C25B1/14

Abstract: A process for synthesizing a Mn4+ doped phosphor of formula I by electrolysis is presented. The process includes electrolyzing a reaction solution comprising a source of manganese, a source of M and a source of A. One aspect relates to a phosphor composition produced by the process. A lighting apparatus including the phosphor composition is also provided. Ax[MFy]:Mn4+ (I) where, 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; and y is 5, 6 or 7.