| abstract |
An α-sialon phosphor having a high nitrogen content and a peak at a wavelength of 595 nm or more with excellent luminous efficiency is provided. A general formula: (Ca X , Eu Y ) (Si, Al) 12 (O, N) 16 (where 1.5 <X + Y <2.2 and 0 <Y <0.2, O / N ≦ 0.04), which is a method for producing a phosphor mainly composed of α-sialon, wherein (a) silicon nitride, (b) aluminum nitride, (c) Ca-containing compound, (d) Raw material mixed powder composed of Eu-containing compound and (e) α-sialon is heat-treated at 1650-1850 ° C. in a nitrogen atmosphere to obtain α-sialon, and the average particle size is 15- A method for producing a phosphor, characterized by obtaining a powder of 25 μm. [Selection figure] None |