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Accelerated formation of 110 K highTcphase in the Ca‐ and Cu‐rich Bi‐Pb‐Sr‐Ca‐Cu‐O system

 

作者: Y. T. Huang,   R. G. Liu,   S. W. Lu,   P. T. Wu,   W. N. Wang,  

 

期刊: Applied Physics Letters  (AIP Available online 1990)
卷期: Volume 56, issue 8  

页码: 779-781

 

ISSN:0003-6951

 

年代: 1990

 

DOI:10.1063/1.103315

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The crystal structure and superconducting properties of the Bi‐Pb‐Sr‐Ca‐Cu‐O system with Ca‐ and Cu‐rich nominal composition were investigated. A nearly single‐phased 110 K highTcsuperconductor can be obtained with 852 °C/20 h sintering from the starting composition of Bi1.7Pb0.4Sr1.6Ca2.4Cu3.6Oy. X‐ray diffraction patterns, resistivity measurement, diamagnetic susceptibility results, and scanning electron micrographs all indicate that the Ca‐ and Cu‐rich nominal composition would result in better superconducting properties than those of Ca:Sr=1:1 Bi‐Pb‐Sr‐Ca‐Cu‐O compounds in a much shorter sintering time.

 

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