Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)
Gallium, pp. 553-557 ff. PDF (469.5 KB)
GALLIUM Chemical and Engineering News. Concentrates —Technology. V. 50, No. 37, Sept. 11, 1972, p. 16. Chemical and Engineering News. Concentrates —Technology. V. 50, No. 35, Aug. 28, 1972, p. 13. Mihake, S. (assigned to Chuo Tateniono Co., Ltd.). Electrowinning. U.S. Pat. 3,677,918, July 18, 1972. Materials Research Corporation. Optoelectronics, The Technology of Optoelectronic Materials. Orangeburg, New York, 1972. display screen based on a matrix of lightemitting gallium-arsenide-phosphide diodes.4 The new screen is reported to be more functionally reliable and, because it uses less tha-n 20% of the power of conventional cathode ray -tubes, it runs at a much lower temperature. The RCA Laboratories in Princeton, - N.J., produced the first instance of superconductivity of an alloy containing only two elements at a temperature higher than 20° K.5 The new material, niobium-gallium, was superconductive at 20.3°K, which could reduce cooling costs for the superconductive phenomenon by 75% and could hasten practical applications in electric motors, generators, and transmission lines. A patent was issued on the recovery of gallium values from circulating aluminate 557 solution used in the Bayer process for producing alumina.6 The proceedings of a conference held at Pebble Beach, Calif., on optoelectronics were published by the Materials Research Corporation.7 Papers on the technology of growing single crystals of gallium arsenide and gallium phosphide and the evaluation of optoelectronic materials were included i-n the proceedings.
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