公开(公告)号：US20180265778A1

公开(公告)日：2018-09-20

申请号：US15709557

申请日：2017-09-20

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Fangming DU ,  James Edward MURPHY ,  Srinivas Prasad SISTA ,  Clark David NELSON ,  Jenna Marie BALDESARE

IPC: C09K11/61 ,  H01L33/50

Abstract: A process for preparing a Mn+4 doped phosphor of formula I includes gradually adding a first solution comprising a source of M and HF and a second solution comprising a source of Mn to a reactor, in the presence of a source of A and an anion selected from phosphate, sulfate, acetate, and combinations thereof, to form a product liquor comprising the Mn+4 doped phosphor. The process also includes gradually discharging the product liquor from the reactor while volume of the product liquor in the reactor remains constant. 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.