Treatment of coarse particle size zinc sulfide to improve visual

Chemistry of inorganic compounds – Sulfur or compound thereof – Binary compound

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501 43, 501904, 264 11, 350 11, 252584, C01B 1700, G02B 522, B29D 1100

Patent

active

043661416

ABSTRACT:
Coarse particle size zinc sulfide is treated with a solution of alkali metal halide to make it adaptable for hot-pressing into shaped, polycrystalline windows which is more transparent in the visible to near visible and infrared spectral regions than untreated coarse particle size zinc sulfide.

REFERENCES:
patent: 2571905 (1951-10-01), Longini
patent: 2651584 (1953-09-01), Longini et al.
patent: 3058807 (1962-10-01), Holland
patent: 3131238 (1964-04-01), Carnall et al.
patent: 3178307 (1965-04-01), Carnall et al.
patent: 3459667 (1969-08-01), Larach et al.
patent: 4146379 (1979-03-01), Copley et al.
Kroger, F. A., Sodium and Lithium as Activators of Fluoresecence in Zinc Sulfide, J. of the Optical Society of America, vol. 39, #8, Aug. 1949 pp. 670-672.

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