Bureau of Mines / Minerals yearbook: Metals and minerals 1978-79
Year 1978-79, Volume 1 (1978-1979)
Gallium, pp. 359-361 ff. PDF (250.8 KB)
GALLIUM Table 4.—U.S. imports for consumption of gallium (unwrought, waste and scrap), by country 361 Country 1978 1979 Kilograms Value Kilograms Value Canada Czechoslovakia Germany, Federal Republic of Hungary Italy Japan Netherlands Switzerland UnitedKingdom Total 75 ~ 748 37 100 ~ 2,628 133 $32,608 ~ 339,806 13,629 31,500 ~ 1,082,700 45,023 450 53 218 59 ~ 41 41 5,498 41 $203,431 16,201 85,716 17,526 ~ 22,452 17,180 2,289,820 19,228 3,721 1,545,266 6,401 2,671,554 WORLD REVIEW Data on world consumption and produc. tion of gallium are not available. However, significant quantities of gallium metal and compounds are probably consumed by countries with large, well-developed electronic and electrical industries. Based on 1978 and 1979 U.S. imports of gallium, the rest-ofworld gallium production probably increased significantly. TECHNOLOGY A solar cell was described that converts sunlight into electricity with a 28.5% conversion efficiency. A mirror focused solar energy on a special filter that splits incoming light waves into low-energy long light waves and high.energy short light waves. The lower energy waves are directed to a silicon cell, and the high.energy waves pass through the filter to an aluminum-gallium arsenide conversion cell. Conversion efficiency was improved because the two-cell system used a wider range of light energy.2 A recent paper reviewed the supplydemand situation for gallium and also discussed recovery technology.~ Gallium extraction from an alkaline aluminate solution obtained from the recovery of aluminum from nepheline ore was described.4 iphysi~ scientist, Section of Nonferrous Metals. 2The Energy Daily. Efficiency Breakthrough. V. 6, No. 132, July 11, 1978, p.4. 3Rosi, F. D. A Survey of the Market, Supply and Availability of Gallium. University of Va., Charlottesville, Va. Oct. 1, 1979,35 pp. 4Badaliants, K. A., et al. Extraction of Gallium From an Alkaline Aluminate Solution Formed in the Extraction of Aluminum From Nepheine Ore. U.S. Pat. 4,152,227, May 1, 1979, 10 pp.
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