Compositions – Radioactive compositions – Luminescent
Patent
1983-06-29
1987-05-12
Davie, James W.
Compositions
Radioactive compositions
Luminescent
2523014R, 372 39, 423249, 423263, 423600, H01S 316
Patent
active
046648496
ABSTRACT:
Beta double prime alumina is provided having a sensible amount of at least one polyvalent cationic species intercalated therein. In accordance with a preferred embodiment, such beta double prime alumina is provided having trivalent and/or tetravalent cationic species intercalated therein, especially species derived from the lanthanide and actinide series of elements. Certain of the foregoing materials exhibit phosphorescence or fluorescence, and some are believed to be capable of producing laser emission upon suitable irradiation.
Methods for modifying beta double prime aluminas comprising contacting crystals of the aluminas with polyvalent cation-containing salts such as in the molten state or in the gaseous state are also provided. Laser and other optical devies are disclosed employing the modified beta double prime aluminas of this invention.
REFERENCES:
patent: 4376709 (1983-03-01), Johnson et al.
Fast Ionic Transport in Solids, Farrington et al., Science, vol. 204, pp. 1371-1379 (1979).
Divalent Beta Aluminas: High Conductivity Solid Electrolytes for Divalent Cations, Farrington and Dunn, Solid State Ionics, vol. 7, No. 4, pp. 267-281 (1982).
Preparation, Structure, Optical and Magnetic Properties of Lanthanide Aluminate of Single Crystals (LnMal.sub.11 O.sub.19), Kahn et al., Journal of Applied Physics, vol. 52, No. 11, pp. 6864-6869, (1981).
A Survey of Group Phosphors, Based on Hexagonal Aluminate and Gallate Host Lattices, Verstegen, Journal of the Electrochemical Society, vol. 121, No. 12, pp. 1623-1627 (1974).
Optical and Structural Investigation of the Lanthanum B-Alumina Phase Doped wih Europium, Dexpert-Ghys et al., Journal of Solid State Chemistry, vol. 19, pp. 193-204 (1976).
EU.sup.2+ Luminescence in Hexagonal Aluminates Containing Large Divalent or Trivalent Cations, Stevels et al., Journal of the Electrochemical Society, vol. 123, No. 5, pp. 691-697 (1976).
Properties of B-Alumina Doped with Cerium, Kennedy et al., Journal of Solid State Chemistry, vol. 42, pp. 170-175 (1982).
The Relation Between Crystal Structure and Luminescence in B-Alumina and Magnetoplumbits Phases, Verstegen et al., Journal of Luminenscene, vol. 9, pp. 406-414 (1974).
X-Ray Diffuse Scattering from Alkali, Silver and Europium B-Alumina, McWhan et al., Physical Review B, vol. 17, No. 10 (1978).
Mn.sup.2+ and T1.sup.+ Luminescence in B-Aluminas, Verstegen et al., Journal of Luminescence, vol. 10, pp. 31-38 (1975).
Effects of Defects on the Quantum Efficiency of Eu.sup.2+ -Doped Aluminates with the Magnetoplumbite-Type Crystal Structure, Stevels et al., Journal of Luminescence, vol. 14, pp. 147-152 (1976).
Eu.sup.2+ Mn.sup.2+ Energy Transfer in Hexagonal Aluminates, Steels et al., Journal of Luminescence, vol. 14, pp. 207-218 (1976).
Luminescence of (Sr, Ce)-Hexa-Aluminates, Alexander et al., Abstract No. 609, Extended Abstracts 83-1, Electrochemical Society Meeting, San Francisco, California, May 1983.
Solid State Ionics, vol. 7, 1982, pp. 267-281, G. C. Farrington et al.: "Divalent beta"-Aluminas: High Conductivity Solid Electrolytes for Divalent Cations", pp. 270-280.
Journal of the Electrochemical Society, vol. 121, No. 12, Dec. 1974, pp. 1623-1627; J.M.P.J. Verstegen: "A Survey of a Group of Phosphors, Based on Hexagonal Aluminate and Gallate Host Latices".
Applied Physics A. Solids and Surfaces, vol. A32, No. 3, Nov. 1983, pp. 159-161, Heidelberg, DE: G. C. Farrington et al.: "The Lanthanide Beta Aluminas".
Dunn Bruce S.
Farrington Gregory C.
Davie James W.
University Patents Inc.
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