| abstract |
The invention provides a wavelength conversion member and a light emitting device using the wavelength conversion member. When the wavelength conversion member is irradiated with light from an LED or an LD, the luminous intensity decreases with time. The present invention is a wavelength conversion member, characterized in that it is obtained by dispersing an inorganic phosphor in a glass matrix, and the glass matrix contains SiO 2 30 to 85%, B 2 O 3 4.3 in mole%. ～ 20%, Al 2 O 3 0 ～ 25%, Li 2 O 0 ～ 3%, Na 2 O 0 ～ 3%, K 2 O 0 ～ 3%, Li 2 O ＋ Na 2 O ＋ K 2 O 0 ～ 3%, MgO 0 to 35%, CaO 0 to 35%, SrO 0 to 35%, BaO 0 to 35%, MgO + CaO + SrO + BaO 0.1 to 45%, and ZnO 0 to 5%. The inorganic phosphor is selected from the group consisting of oxide phosphors, A group of nitride phosphors, oxynitride phosphors, chloride phosphors, oxychloride phosphors, halide phosphors, aluminate phosphors, and halophosphate phosphors At least one of them. |