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Fabrication of dense Ba2YCu3O7−&dgr;superconductor wire by molten oxide processing

 

作者: S. Jin,   T. H. Tiefel,   R. C. Sherwood,   G. W. Kammlott,   S. M. Zahurak,  

 

期刊: Applied Physics Letters  (AIP Available online 1987)
卷期: Volume 51, issue 12  

页码: 943-945

 

ISSN:0003-6951

 

年代: 1987

 

DOI:10.1063/1.98809

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Fabrication of highTcceramic superconductors by an oxide melting method in place of a conventional sintering method has been attempted. Using three different processes, i.e., melt drawing, melt spinning, or preform‐wire melting, it is demonstrated that the Ba2YCu3O7−&dgr;type superconductors can successfully be fabricated into a desired geometry such as wire and ribbon.Tc’s forR=0 were about 92 K. The density of the melt‐processed compound was measured to be as high as 6.2 g/cm3, or ∼98% of the theoretical density 6.3 g/cm3as compared to the value of 80–85% density for sintered samples. The increased density is likely to be responsible for the noted improvements in fracture resistance and in theJcvalue of the melt‐processed compound.

 

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