| abstract |
This phosphor-dispersed glass comprises phosphor particles and a phosphor sealing material. The phosphor-dispersed glass is characterized in that the phosphor sealing material is a fluoride glass and the fluoride glass composition consists of 1-45 mol% of AlF 3 , a total of 30-60 mol% of Hf fluoride and Zr fluoride, a total of 20-65 mol% of alkaline earth fluoride, a total of 2-25 mol% of a fluoride of at least one element selected from the group consisting of Y, La, Gd, and Lu, and a total of 0-20 mol% of a fluoride of at least one alkali metal selected from the group consisting of Na, Li, and K. With this phosphor-dispersed glass, it is possible to prevent deactivation of the phosphor, regardless of the type of phosphor used. |