Patent ID: 9309457
Filing Date: 2016-04-12
CPC Classification: C09K

Claim Text:
1. A method for manufacturing a coated phosphor in which a phosphor is coated with a coating material comprising: a mixing step of mixing the phosphor with the coating material in a solvent to form a mixed solution; and a separation step of separating the mixed solution into a solid phase and a liquid phase, wherein the phosphor contains barium (Ba), strontium (Sr), europium (Eu), silicon (Si) and oxygen (O) at an atomic ratio represented by compositional formula (1), and the mass ratio of the phosphor to the coating material is 40:260 to 200:260, wherein a, b, c, x and y satisfy the relationships: 2.7<a<3.3, 0.9<b<1.1, 4.5<c<5.5, 0<x<0.09 and 0.25<y<0.75, wherein the uncoated phosphor has a specific surface area equal to or more than 2 m2/g, and the coating material is an alkylsilane compound.