Method for producing a divalent europium-activated phosphor

Details Method for producing a divalent europium-activated phosphor Method for producing a divalent europium-activated phosphor

1998-11-03

2000-08-01

Koslow, C. Melissa

Compositions

Inorganic luminescent compositions

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

C09K 1164

Patent

active

060962437

ABSTRACT:
A phosphor host compound is produced from a host compound material. Then, the host compound and a trivalent europium compound are reacted in a reducing atmosphere to generate a desired divalent europium-activated phosphor. If the divalent europium-activated phosphor is generated in this manner, a chemical reaction between the raw material for the host compound and the trivalent europium compound can be suppressed. Therefore, variations in the luminescent color among different production lots of the phosphor can be suppressed, and a phosphor with high color purity can be provided with high repeatability.

REFERENCES:
patent: 4161457 (1979-07-01), Takahashi et al.
patent: 4894584 (1990-01-01), Steinmann et al.
A.L.N. Stevels et al. "Eu.sup.2+ Luminescence in Hexagonal Aluminates Containing Large Divalent or Trivalent Cations" J. Electrochem. Soc., vol. 123, No. 5, pp. 691-697, May 1976.

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