Calcium yttrium borate phosphor composition

Details Calcium yttrium borate phosphor composition Calcium yttrium borate phosphor composition

1978-10-25

1980-05-13

Cooper, Jack

Compositions

Inorganic luminescent compositions

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

C09K 1146

Patent

active

042027942

ABSTRACT:
An improved phosphor composition excited by ultraviolet radiation to emit in the red region of the visible spectrum. The phosphor composition is expressible by the general constituent formulation xCaO.y(Y+Eu).sub.2 O.sub.3. zB.sub.2 O.sub.3 wherein x is from about 32 to 38, y is from about 31 to 41 and z is from about 25 to 31, with x, y and z expressing relative molar proportions of the constituents. The phosphor is activated by Eu. The relative molar proportions of the phosphor constituents are such that they fall within a predetermined area of a specified ternary phase diagram.

REFERENCES:
patent: 3449258 (1969-06-01), Ropp et al.
Blasse "J. Solid State Chem.", vol. 4, pp. 52-54, 1972.

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