QUASI-HYDROSTAT1CALLY COLD-PRESSED Bi0.8Pb0.2SrCaCu2Ox SUPERCONDUCTORS | Zendy

WU BING-QING | Zendy; Wenkui Wang | Zendy; Jin ChangQing | Zendy; LIU WEI | Zendy; Fanghua Li | Zendy; Shichao Liu | Zendy; Liu Zhenxing | Zendy; Zhao Zhongxian | Zendy; Yushu Yao | Zendy

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QUASI-HYDROSTAT1CALLY COLD-PRESSED Bi0.8Pb0.2SrCaCu2Ox SUPERCONDUCTORS

Author(s) -

WU BING-QING,

Wenkui Wang,

Jin ChangQing,

LIU WEI,

Fanghua Li,

Shichao Liu,

Liu Zhenxing,

Zhao Zhongxian,

Yushu Yao

Publication year - 1992

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.41.1993

Subject(s) - hydrostatic pressure , superconductivity , annealing (glass) , materials science , condensed matter physics , hydrostatic equilibrium , shear stress , composite material , thermodynamics , physics , quantum mechanics

The effects of quasi-hydrostatic pressure treatments on the Bi-system superconductors were investigated The cold-pressing treatments seriously weakened the inter-granular weaklinks and induced a large number of intragranular defects, resulting in the deterioration of the suprcon-ducting properties. The targe increase in the bulk density and the orientation of the superconducting grains were also observed in the cold-pressed samples. These drastic changes of superconductivity were mainly due to the shear stress under quasi-hydrostatic pressure. The post annealing treatments greatly enhanced the weaklinks and caused the partial recovery and the agglomeration of some defects. By coldpressing-annealing method, Jc (77 K, zero field) was raised to about 1600A/cm2. The pressure dependence of Tc under hydrostatic pressure was also investigated and dTc/dp was found to be 1.4K/GPa.

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