| abstract |
1. A phosphor comprising an europium activated sialon crystal having a basic composition represented by the following formula (1), wherein the phosphor has a sphericity of 0.60 or more and is excited with ultraviolet light, purple light or blue light, to be. (Where x is 0 < x < 1, alpha is 0 < alpha? 3, and?,?,? And? Are values converted into? 0??? 1.5, 10??? 20) |