Production method of sialon-based phosphor, and sialon-based...

Details Production method of sialon-based phosphor, and sialon-based... Production method of sialon-based phosphor, and sialon-based...

2007-08-21

2007-08-21

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

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

Reexamination Certificate

active

11000853

ABSTRACT:
To provide a sialon-based phosphor capable of forming a thin film by mixing it with a resin, and giving a uniform photoluminescent light with high light emission intensity, and to provide a method for producing a sialon-based phosphor not having excessively large agglomerated particles and a wide particle size distribution, there is provided a method for producing an α-sialon based phosphor represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?MxLnySi12−(m+n)Al(m+n)OnN16−nin-line-formulae description="In-line Formulae" end="tail"?wherein M is at least one metal selected from Ca, Mg, Y and Li, Ln is at least one lanthanide metal selected from Eu, Dy, Er, Tb, Yb and Ce, ax+by=m (assuming that the valence of metal M is a and the valence of lanthanide metal Ln is b), 0<x≦1.5, 0.3≦m≦4.5, and 0<n<2.25), wherein the silicon nitride raw material used as the raw material is a silicon nitride raw material powder comprising amorphous silicon nitride and crystalline silicon nitride.

REFERENCES:
patent: 6657379 (2003-12-01), Ellens et al.
patent: 6670748 (2003-12-01), Ellens et al.
patent: 6674233 (2004-01-01), Ellens et al.
patent: 1445295 (2004-08-01), None
patent: 2002-363554 (2002-12-01), None

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