| 摘要 |
To provide a Sialon-based phosphor having a high photoluminescent intensity, which can realize a high brightness LED, particularly a white LED using a blue LED as the light source, and a production method of the Sialon-based phosphor. The alpha-Sialon based phosphor of the present invention is represented by the formula: <?in-line-formulae description="In-line Formulae" end="lead"?>Li<SUB>x</SUB>M<SUB>y</SUB>Ln<SUB>z</SUB>Si<SUB>12-(m+n)</SUB>Al<SUB>(m+n)</SUB>O<SUB>n</SUB>N<SUB>16-n</SUB> (I)<?in-line-formulae description="In-line Formulae" end="tail"?> wherein M is at least one metal selected from Ca, Mg and Y, Ln is at least one lanthanide metal selected from Eu, Dy, Er, Tb, Yb and Ce, x+ay+bz=m (assuming that the valence of metal M is a and the valence of lanthanide metal Ln is b), 0<x<=0.8, 0<y, 0<z, 0.3<=m<4.5, and 0<n<2.25.
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