公开(公告)号：US10793773B2

公开(公告)日：2020-10-06

申请号：US15709557

申请日：2017-09-20

申请人： Current Lighting Solutions, LLC

发明人： Fangming Du ,  James Edward Murphy ,  Srinivas Prasad Sista ,  Clark David Nelson ,  Jenna Marie Baldesare

IPC分类号： C09K11/61 ,  H01L33/50 ,  H01L33/48 ,  C09K11/57

摘要： 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.