| abstract |
The present invention provides a phosphor comprising a europium activated sialon crystal having a basic composition represented by the formula: (Sr 1 -x , Eu x ) α Si β Al γ O δ N ω (1) ?,?,?,?,?,?,?,? and? are values in the range of 9 <? 15, 1?? 5, 0.5? ?? 30), the phosphor has a sphericity of 0.65 or more and is excited by ultraviolet light, purple light or blue light, thereby emitting green light. |