Silicate phosphor

Details Silicate phosphor Silicate phosphor

1987-06-26

1989-01-03

Copper, Jack

Compositions

Inorganic luminescent compositions

Zinc or cadmium containing

2523014F, C09K 1159

Patent

active

047955899

ABSTRACT:
A silicate phosphor comprising manganese as an activator, a trivalent element and a pentavalent element, wherein said trivalent element is at least one element selected from the group consisting of boron and indium, said pentavalent element is at least one element selected from the group consisting of arsenic, antimony and bismuth, the content of the trivalent element is from 1.times.10.sup.-4 to 2.times.10.sup.-2 gram-atom/mol, the content of the pentavalent element is not more than 3.times.10.sup.-3 gram-atom/mol, and the molar ratio of the trivalent element to the pentavalent element (trivalent element/pentavalent element) is at least 1.5.

REFERENCES:
patent: 2169046 (1939-08-01), Headrick
patent: 2241939 (1941-05-01), Aschermann et al.
patent: 2545880 (1951-03-01), Froelich
patent: 4231892 (1980-11-01), Chang et al.

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