Heat Treating Condition Dependence of Jc-B Characteristics for Silver Sheathed Y1−xCaxBa2Cu4O8 Superconductors

Kazuyuki Shibutani,Seiji Hayashi,Rikuo Ogawa,Yoshio Kawate

doi:10.1007/978-4-431-68141-0_107

Heat Treating Condition Dependence of Jc-B Characteristics for Silver Sheathed Y1−xCaxBa2Cu4O8 Superconductors

Kazuyuki Shibutani, Seiji Hayashi + Show 2 more

https://doi.org/10.1007/978-4-431-68141-0_107

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Publication Date: Jan 1, 1991

Citations: 1

Affiliation: Kobe Steel (Japan)

#Increasing Oxygen Partial Pressure #Critical Transport Current Density + Show 8 more

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Abstract

The decomposition temperature of the Ca-doped Y124 materials in the silver sheathed wires rose from 775°C to 845°C with increasing oxygen partial pressure (Po2) from Po2=0.2bar(in4air) to Po2=1.0 bar (in pure oxygen). The critical transport current density (Jct) of 2.01×104 A/cm2 was obtained for silver sheathed Y(Ca)124 wire at 4.2K and OT by selecting the oxygen partial pressure and the annealing temperature. The grain boundary coupling of this specimen was found to be insufficient by AC susceptibility measurement.

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