Abstract
The influence of Zn doping on the physical and electrical properties of the Tl-1223 phase has been investigated for samples with the composition (Tl 0.5Pb 0.5)(Sr 0.9Ba 0.1) 2Ca 2(Cu 1− x Zn x ) 3O 8+ δ ( x=0, 0.01, 0.05 and 0.1). Sr–Ba–Ca–Cu–Zn containing precursor materials were prepared via malic acid gels followed by a calcination step at 900 °C. Tl 2O 3 and PbO were added by co-milling. Sintering in oxygen atmosphere yielded high-quality superconducting material. Oxygen annealing, re-grinding and re-sintering improved the electrical properties, leading to critical temperatures ( T c(0)) of 117 K and critical current densities up to 3800 A cm −2 at 77 K for bulk phase material. The addition of Zn increased the content of the Tl-1212 phase, changed the microstructure, decreased the transition temperature slightly and reduced the critical current density at 77 K.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
