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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