Sialon-based phosphor and its production method

Details Sialon-based phosphor and its production method Sialon-based phosphor and its production method

2006-12-05

2006-12-05

Group, Karl (Department: 1755)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C252S30140R, C313S503000

Reexamination Certificate

active

07144524

ABSTRACT:
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 α-Sialon based phosphor of the present invention is represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?LixMyLnzSi12−(m+n)Al(m+n)OnN16−n  (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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