Solar energy grade cadmium sulfide

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

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136260, 2525011, 252518, 252 623ZT, C01B 1700, H01L 3100, H01B 106

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active

042540933

ABSTRACT:
A composition consisting essentially of discrete particles of cadmium sulfide that are relatively free of anionic, cationic and volatile impurities has an average particle size of from about 8 to about 25 micrometers and a bulk density of from about 1.7 to about 1.9 grams per cubic centimeter and has superior properties for use in solar energy applications. The composition is prepared by forming a finely-divided impure cadmium sulfide by chemical precipitation, heating the resulting precipitate to an intermediate temperature in a flow of an inert gas, heating the material at an elevated temperature in a flowing sulfide atmosphere selected from hydrogen sulfide and carbon disulfide and cooling the heated material in a sulfide atmosphere to about the intermediate temperature and cooling to ambient temperature in an inert gas.

REFERENCES:
patent: 2890939 (1959-06-01), Ravich
patent: 3065515 (1962-11-01), Antes
patent: 3362795 (1968-01-01), Weisbeck
Czyzak et al., Cadmium Sulfide Crystals, J. of Applied Physics, vol. 23, Aug. 1952, pp. 932-933.
Cherin et al., Cadmium Zinc Sulfide Solid Solutions, J. of American Electrochemical Society, vol. 117, No. 2, 1970, pp. 233-236.

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