| 摘要 |
Provided is a method for producing a red phosphor which is a Mn-activated complex fluoride represented by formula (1), A2MF6:Mn (1) (M is one type or more of a tetravalent element selected from Si, Ti, Zr, Hf, Ge, and Sn, and A is one type or more of an alkali metal selected from Li, Na, K, Rb, and Cs, and includes at least Na and/or K.), wherein, as a reactive source, a solid of a complex fluoride represented by formula (2), A2MF6 (2) (M and A are as described above) and a solid of a manganese compound represented by formula (3), A2MnF6 (3) (A is as described above) are mixed and heated at a temperature of from 100° C. to 500° C. According to the present invention, a Mn-activated complex fluoride phosphor having favorable luminescence properties can be obtained without using hydrofluoric acid in a main step. |
| 主权项 |
1. A method for producing a red phosphor that is a manganese-activated complex fluoride represented by the formula (1):
A2MF6:Mn (1) wherein M is one or more tetravalent element selected from the group consisting of silicon, titanium, zirconium, hafnium, germanium and tin, and A is one or more alkali metal selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, and includes at least sodium and/or potassium, the method comprising the steps of: mixing, as reaction raw materials, a solid of a complex fluoride represented by the formula (2):
A2MF6 (2) wherein M is one or more tetravalent element selected from the group consisting of silicon, titanium, zirconium, hafnium, germanium and tin, and A is one or more alkali metal selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, and includes at least sodium and/or potassium, and a solid of a manganese compound represented by the formula (3):
A2MnF6 (3) wherein A is one or more alkali metal selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, and includes at least sodium and/or potassium, and heating the mixture at a temperature of at least 100° C. and not above 500° C. |
