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PRODUCTION OF OXIDE SUPERCONDUCTOR SINGLE CRYSTAL AND METHOD FOR CONTROLLING SUPERCONDUCTIVITY TRANSITION TEMPERATURE
PRODUCTION OF OXIDE SUPERCONDUCTOR SINGLE CRYSTAL AND METHOD FOR CONTROLLING SUPERCONDUCTIVITY TRANSITION TEMPERATURE
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机译:氧化物超导体单晶的生产及控制超导转变温度的方法
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PURPOSE:To produce the Tl2Ba2CuO6 single crystal having good quality and sufficient size by heating and melting a powder mixture composed of Tl2O3, Bad, Cub, and PbCl2 consisting of specific compounding ratios under specific conditions, then slowly cooling the mixture. CONSTITUTION:The powder mixture of the compsn. range consisting of Tl2O3+2 BaO+CuO+xPbCl2 (3=x=300) is melted by using PbCl2, as a flux and the melt is slowly cooled at a mate of =10 deg.C/hour. The resulted single crystal is washed with water to remove PbCl2. The single crystal of the Tl2Ba2CuO6 is then taken out. The single crystal of the Tl2Ba2CuO6 having the good quality and the sufficient size is obtd. in this way and is subjected to the heat treatment in the temp. range of 300 to 600 deg.C under the pressurized oxygen up to 400atm, by which the superconductivity transition temp. (Tc) is arbitrarily controlled in an about 0 to 85K range.
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