- Turkish Journal of Physics
- Vol: 26 Issue: 6
- Microstructure and Critical Current of Hot-Pressed YBCO Ceramics
Microstructure and Critical Current of Hot-Pressed YBCO Ceramics
Authors : Şadan Özcan, Tezer Firat And Engin Özdaş
Pages : 435-440
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Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :The effect of hot-pressing (HPing) on the densification and the superconducting properties of YBCO were investigated. The phases and microstructure were analysed by XRD and SEM and transport properties were studied by I-V and AC susceptibility measurements. Relative density up to 93% and critical current density of 509 A/cm2 at 77 K were achieved through uniaxial HPing at 800°C under 325 kg/cm2 pressure for 4 hours. HPing raised the Jc from 80 A/cm2 to 509 A/cm2. These results and AC susceptibility measurements reveal that the weak links or pinning forces were improved by increasing HPing pressure.Keywords : A. High temperature superconductors, B. Hot pressing, C. YBCO, D. I-V, E. AC susceptibility.