Patent ID: 11939503
Assignee: INTELLIGENT MANUFACTURINIG INSTITUTE OF HFUT
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A preparation method for manganese-doped red phosphor, wherein the method comprises:
1) mixing A2BF6 polycrystalline particles with grinding balls, wherein a mass ratio of the A2BF6 polycrystalline particles to the grinding balls is 1:1 to 1:2.5, and then ball-milling for 30 minutes to 120 minutes, wherein A is a monovalent cation, at least one selected from the group consisting of a potassium ion, a hydrogen ion, a lithium ion, a sodium ion and a cesium ion, and B is a tetravalent cation, at least one selected from the group consisting of a titanium ion a silicon ion, a germanium ion, a tin ion, and a zirconium ion;
2) secondary crystallization treatment: mixing A2BF6 powder obtained after ball-milling with a hydrofluoric acid, a mass concentration of the hydrofluoric acid is 30% to 59%, wherein a mass ratio of the A2BF6 powder obtained after ball-milling to the hydrofluoric acid is 1:1 to 2.5:1, and then at a revolving speed of 1 RPM to 1200 RPMs, stirring for 12 hours to 72 hours;
3) filtering out solid particles in A2BF6 and hydrofluoric acid solution after the secondary crystallization treatment, to obtain secondary crystallization A2BF6 particles;
4) according to a molar ratio of A2BF6 and A2MnF6 which is 93:7 to 90:10, weighing the secondary crystallization A2BF6 particles and A2MnF6, and then firstly dissolving A2MnF6 in a hydrofluoric acid, a mass concentration of the hydrofluoric acid is 30% to 59%, and then adding the secondary crystallization A2BF6 particles to a solution comprising the A2MnF6 and the hydrofluoric acid, and continuously stirring for 10 minutes to 360 minutes for ion exchange, wherein a ratio of a total mass of A2BF6 and A2MnF6 to a mass of the hydrofluoric acid is 1:1 to 4:1; and
5) filtering out solid particles in solution after the ion exchange, to obtain a filter cake, and then drying the filter cake to obtain the manganese-doped red phosphor.