| 摘要 |
According to the invention, a highly crystalline α-sialon is synthesized to emit highly intense light and a white LED showing an excellent color rendering characteristic is provided by shifting emitted light to the short wavelength side (blue shift). Such an α-sialon is designed so as to be expressed by general formula (Lix, Cay, Euz) (Si12−(m+n)Alm+n) (OnN16−n) wherein the numerical ranges of x, y, z, m and n are respectively 0<x<2.0, 0<y<2.0, 0<z≦̸0.5 (provided that 0.3≦̸x+y+z≦̸2.0), 0<m≦̸4.0 and 0<n≦̸3.0. |
