公开(公告)号：EP3303516A1

公开(公告)日：2018-04-11

申请号：EP16723922.7

申请日：2016-05-11

申请人： General Electric Company

发明人： DU, Fangming ,  BEERS, William Winder ,  COHEN, William Erwin ,  NELSON, Clark David ,  NOVAK, Jenna Marie ,  ROOT, John Matthew ,  MURPHY, James Edward ,  SISTA, Sriniva Prasad

IPC分类号： C09K11/61

CPC分类号： C09K11/616 ,  C09K11/617

摘要： A process for preparing a Mn+4 doped phosphor of formula: Ax [MFy]:Mn+4, includes gradually adding a first solution to a second solution and periodically discharging the product liquor from the reactor while volume of the product liquor in the reactor remains constant; wherein 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; y is 5, 6 or 7. The first solution includes a source of M and HF and the second solution includes a source of Mn to a reactor in the presence of a source of A.