Lithium-containing sialon phosphor and method of...

Details Lithium-containing sialon phosphor and method of... Lithium-containing sialon phosphor and method of...

2011-03-22

2011-03-22

Koslow, C. Melissa (Department: 1734)

Compositions

Inorganic luminescent compositions

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

C252S30140R, C313S503000

Reexamination Certificate

active

07910023

ABSTRACT:
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.

REFERENCES:
patent: 7074346 (2006-07-01), Yamada et al.
patent: 7258818 (2007-08-01), Sakata et al.
patent: 2003/0030038 (2003-02-01), Mitomo et al.
patent: 2005/0001225 (2005-01-01), Yoshimura et al.
patent: 2005/0012075 (2005-01-01), Sakata et al.
patent: 2005-036038 (2005-02-01), None

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