Abstract
This paper presents a study on the feasibility of concurrent synthesis and melt-processing of Yttrium Barium Copper Oxide-0.325 Ag (Y123-Ag) superconductor by thermo-mechanical processing of the silver-clad precursor containing BaCuO2.5 at reduced oxygen partial pressures. At 950-955°C the melted Y123-Ag superconductor was contained in a solid silver cladding which melted at 960-965°C. After 15 min at 950-965°C and oxygen partial pressures of 0.28 and 0.55 kPa, melted orthorhombic Y123-Ag formed. On extending the heat-treatment from 15 to 30 min, the orthorhombic Y123-Ag changed to tetragonal Y123-Ag which was supported directly by a series of rapid-heat, soak, and rapid-cool experiments at 950°C (PO2 = 0.28 kPa), and thus direct formation of orthorhombic Y123-Ag from BaCuO 2.5. The highest critical current densities, Jc (transport) at 77 K and Jc (magnetization) estimated from the magnetization hysteresis loop were 4.0 × 103 and 1.2 × 105 A/cm2, respectively.
Original language | English |
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Pages (from-to) | 6841-6847 |
Number of pages | 7 |
Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
Volume | 42 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2003 Nov |
Externally published | Yes |
Keywords
- BaCuO
- Orthorhombic phase
- Oxygen partial pressure
- Tetragonal phase
- Yttrium Barium Copper Oxide-0.325Ag (Y123-Ag) superconductor
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)