Phosphor composition for lamps

Details Phosphor composition for lamps Phosphor composition for lamps

2007-12-18

2007-12-18

Koslow, C. Melissa (Department: 1793)

Compositions

Inorganic luminescent compositions

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

C252S30140F

Reexamination Certificate

active

11199270

ABSTRACT:
The invention relates to a phosphor composition for lamps with a lattice of monoclinic crystal structure (monazite) of type (1−g)[((1−c−a)*Ln, c*Ce, a*A)PO4]×g*GeO2, in which Ln is at least one element selected from the group consisting of lanthanum La, gadolinium Gd and/or Yttrium Y and A is at least one activator selected from the group consisting of terbium Tb, praseodymium Pr and/or europium Eu, and 0≦a≦1.0; 0≦c≦1.0, and 0<g≦0.2.

REFERENCES:
patent: 6590333 (2003-07-01), Suzuki et al.
Effect of Thorium on Ce+3Phosphors Mary V. Hoffman Lighting Research Laboratory, General Electric Company, Ohio 44112 vol. 118, No. 9 J. Electrochem. Soc.: Solid State Science Sep. 1971 pp. 1508-1510.

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