Bi_(1.6)Pb_(0.4)Sr_2Ca_2Cu_3O_x超导体高温电阻率的研究  

STUDY ON THE HIGH TEMPERATURE RESISTIVITY OF Bi 1.6 Pb 0.4 Sr 2Ca 2Cu 3O x

作　　者：张留碗[1] 陈廷国[2] 

机构地区：[1]清华大学现代应用物理系 [2]中国科学院上海冶金研究所

出　　处：《物理学报》1998年第11期1906-1911,共6页Acta Physica Sinica

摘　　要：研究了高温热处理对ＢＰＳＣＣＯ２２２３超导体高温电阻率的影响，观察到电阻率的奇异变化．实验结果表明，高温氮气退火，除ＢｉＯ层外，ＣｕＯ层也发生脱氧，同时伴随金属离子的运动．氧含量和氧重布及金属离子的运动引起了ＢＰＳＣＣＯ２２２３相微结构的多样性．Abstract The effects of heat treatments on the resistivity of BPSCCO 2223 superconductor were studied. The anomalous behavior in high temperature resistivity was observed. It was shown that upon annealing in N 2 at high temperatures, the oxygen escaped not only from Bi O layer but also from Cu O layer accompanied with the movement of metal ions. The change in oxygen content and the redistribution of oxygen and metal atoms diversified the microstructure of BPSCCO 2223 phase.

关 键 词：BPSCCO 高温热处理 高TC 超导体 高温电阻率 

分 类 号：TM262.014[一般工业技术—材料科学与工程]