Processes for preparing color stable red-emitting phosphor particles having small particle size
申请人:Current Lighting Solutions, LLC
公开号:US11193059B2
公开(公告)日:2021-12-07
A process for preparing a Mn+4 doped phosphor of formula I
Ax[MFy]:Mn+4 I
includes combining a first solution comprising a source of A and a second solution comprising H2MF6 in the presence of a source of Mn, to form the Mn+4 doped phosphor;
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; and
wherein a value of a Hammett acidity function of the first solution is at least −0.9.
Particles produced by the process may have a particle size distribution with a D50 particle size of less than 10 μm.
一种制备式 I 的掺杂 Mn+4 荧光粉的工艺
Ax[MFy]:Mn+4 I
包括在锰源存在的情况下,将包含 A 源的第一溶液和包含 H2MF6 的第二溶液混合,形成掺杂 Mn+4 的荧光粉;
其中
A 是 Li、Na、K、Rb、Cs 或它们的组合;
M 是 Si、Ge、Sn、Ti、Zr、Al、Ga、In、Sc、Y、La、Nb、Ta、Bi、Gd 或它们的组合;
x 是[MFy]离子电荷的绝对值;
y 是 5、6 或 7;以及
其中第一溶液的哈密特酸度函数值至少为-0.9。
该工艺生产的颗粒可能具有 D50 粒径小于 10 μm 的粒径分布。