Precursor Influence on the Electrical Properties of Textured Bi-2212 Superconductors
作者： A. Sotelo , S. Rasekh , M. A. Madre , J. C. Diez
DOI: 10.1007/S10948-010-0894-6
关键词: Sol-gel 、 Crystallization 、 Directional solidification 、 Polymer 、 Texture (crystalline) 、 Microstructure 、 Scanning electron microscope 、 Materials science 、 Chemical engineering 、 Electrical resistivity and conductivity 、 Electronic, Optical and Magnetic Materials 、 Condensed matter physics
摘要: Several synthetic methods, solid-state, sol-gel and polymer solution have been used to prepare prereacted precursors, as well a vitreous material obtained by melt quenching. The influence of the starting powder characteristics on phase formation, microstructure, T c J Bi-2212 textured rods prepared directional crystallization from has analyzed. In all cases, high transport critical current values (higher than 3000 A/cm2 at 77 K) obtained, independently precursor type. Samples route show improved values, associated lower oxygen content.
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