| abstract |
In the present invention, general formula M x Si 12- (m + n) Al (m + n) O n N 16-n : Ln y (wherein 0.3≤x + y <1.5, 0 <y <0.7, 0.3≤ The cohesion index is mainly composed of α-sialon represented by m <4.5, 0 <n <2.25, the valence of the metal M is a, and the valence of the lanthanide metal Ln is m = ax + by). The present invention relates to an oxynitride phosphor having A 1 = D 50 / D BET ≤ 3.0 or a cohesion index A 2 = D 50 / D particle ≤ 3.0, and a method for producing and using the phosphor.n n n Since the fluorescent substance of this invention has little aggregation and a narrow particle size distribution, it is easy to mix uniformly with resin etc. and can obtain a high brightness white LED easily.n n n D 5 [μm]: the median diameter in the particle size distribution curven n n D BET [μm]: Diameter per sphere converted from BET specific surface arean n n D particle [㎛]: Primary particle diameter measured by image analysis of scanning electron micrograph |