Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2005-09-16
2009-06-02
Koslow, C. Melissa (Department: 1793)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C313S467000, C313S486000, C313S503000, C257S098000
Reexamination Certificate
active
07540977
ABSTRACT:
The present invention aims at providing a chemically stabilized inorganic phosphor, among oxynitride phosphors including alkaline earths, which oxynitride phosphor emits orange or red light at longer wavelengths at higher luminance than conventional sialon phosphors activated by rare earths. The present invention further aims at providing a light emitting instrument based on the phosphor, for a lighting instrument excellent in color rendering property and for an image displaying apparatus excellent in durability.The solving means resides in provision of a fundamental phosphor comprising:a composition on a pseudo-ternary phase diagram including AO (A is one kind or two or more kinds of element(s) selected from Mg, Ca, Sr, and Ba; and AO is oxide of A), Si3N4, and SiO2as end members, respectively, and satisfying all of the following conditions:in a composition formula, pAO-qSi3N4-rSiO2(p+q+r=1),in-line-formulae description="In-line Formulae" end="lead"?0.1≦p≦0.95 (1),in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.05≦q≦0.9 (2), andin-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0≦r≦0.5 (3), andin-line-formulae description="In-line Formulae" end="tail"?at least a metallic element M (M is one kind or two or more kinds of element(s) selected from Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb) dissolved, in a solid state, in the composition.
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Derwent acc No. 2007-546758, 2008, abstract for DE 102005059521, WO2007068592 and EP 1966345.
Hirosaki Naoto
Xie Rong-Jun
Kanesaka Manabu
Koslow C. Melissa
National Institute for Materials Science
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