Rare earth-doped, stabilized cadmium halide glasses

Details Rare earth-doped, stabilized cadmium halide glasses Rare earth-doped, stabilized cadmium halide glasses

1992-09-21

1993-08-31

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501152, 501151, 501904, C03C 4100, P03C 332

Patent

active

052408850

ABSTRACT:
This invention is directed to the production of transparent glasses exhibiting transmission far into the infrared regime of the radiation spectrum. The glasses consist essentially, in mole percent, of 42-55% CdF.sub.2 and/or CdCl.sub.2, 2-15% BaF.sub.2 and/or BaCl.sub.2, 30-40% NaF and/or NaCl, 2-7% KF and/or KCl, 1-12% total of at least one stabilizing metal halide selected from the group LiX, BeX.sub.2, MgX.sub.2, MnX.sub.2, PbX.sub.2, TlX, CoX.sub.2, and ZnX.sub.2, and 0.005-0.5% ReX.sub.3, wherein Re is at least one rare earth metal selected from the lanthanide series of rare earth metals and X is at least one halide selected from the group consisting of fluoride, chloride, and bromide.

REFERENCES:
patent: 4647545 (1987-03-01), Lucas et al.
Jha and Parker in "Preparation of Infrared Transmitting CdF.sub.2 Based Mixed Halide Glasses", Physics and Chemistry of Glasses, 32, No. 1, Feb. 1991, pp. 1-12.
J. L. Mouric et al in Progress in Cadmium Halide Glasses, Materials Science Forum, vol. 5, pp. 135-144 (1985).
M. Matecki et al in Alkali Cadmium Halide Glasses, Fourth International Symposium on Halide Glasses, Jan. 26-29, 1987, pp. 470-476.
M. Matecki et al in Composition Adjustments in Cadmium Fluorochloride Glasses, Journal of Non-Crystalline Solids, 140, pp. 82-86 (1992).

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