Borate phosphor

Details Borate phosphor Borate phosphor

1983-10-17

1989-03-07

Cooper, Jack

Compositions

Inorganic luminescent compositions

Zinc or cadmium containing

2523014R, C09K 1163

Patent

active

048104167

ABSTRACT:
A borate phosphor represented by the formula a(M.sup.II.sub.1-x, M.sup.IV.sub.x/2)O.bM.sup.V.sub.2 O.sub.5.cM.sup.I.sub.2 O.(B.sub.1-y-z,M.sup.III.sub.y, M.sup.VI.sub.z/2).sub.2 O.sub.3 :dCe,eTb wherein M.sup.II is at least one divalent metal selected from the group consisting of Mg, Be, Zn, Cd, Ca, Sr and Ba; M.sup.IV is at least one tetravalent element selected from the group consisting of Si, Ti, Ge, Zr, Sn, Th and Pb; M.sup.V is at least one pentavalent element selected from the group consisting of P, V, Nb, Sb, Ta and As; M.sup.I is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; M.sup.III is at least one trivalent metal selected from the group consisting of Al, Sc, Ga, Y, In, La, Lu, Gd, Bi and Tl; M.sup.VI is at least one hexavalent meteal selected from the group consisting of Mo, Te and W; and a, b, c, d, e, x, y and z are numbers satisfying the conditions of 0<a.ltoreq.2.0; 0.ltoreq.b.ltoreq.0.3; 0.ltoreq.c.ltoreq.0.3, 0<d.ltoreq.0.6, 0.ltoreq.e.ltoreq.0.6, 0.ltoreq.x.ltoreq.0.6, 0.ltoreq.y.ltoreq.0.35 and 0.ltoreq.z.ltoreq.0.01, respectively. The phosphor emits blue to green light of high luminance under excitation of ultraviolet rays, cathode rays, X-rays, vacuum ultraviolet rays, or the like. Particularly, the phosphor emits blue to green light of higher luminance than the conventional cerium activated or cerium and terbium activated oxide phosphors under excitation of ultraviolet rays or vacuum ultraviolet rays.

REFERENCES:
patent: 3014877 (1961-12-01), Ranby et al.
patent: 3375465 (1968-03-01), Brixner
patent: 3423325 (1969-01-01), Wanmaker et al.
patent: 3505242 (1970-04-01), Chenot et al.
patent: 3838060 (1974-09-01), Kaduk
Blasse et al I, "The J. of Chem. Phys.", vol. 51, No. 8, Oct. 1969, pp. 3252-3254.
Blasse et al II, "The J. of Chem. Phys.", vol. 47, No. 6, Sep. 1967, pp. 1920-1926.
Blasse et al III, "The J. of Chem. Phys.", vol. 47, No. 12, Dec. 1967, pp. 5139-5145.

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