Jc-B Characteristics and Microstructure Dependence of Jc of High Jc Bi-based Superconducting Oxide Tapes
来源期刊：Rare Metals1993年第2期
论文作者：叶斌 周贻茹 曾荣 周敏 张建国 刘安生 王俊升 袁冠森 崔长庚 李山林 张进龙 景秀年 金新
文章页码：131 - 136
摘 要：<正> Bi-based 2223 superconducting tapes with high critical current densities were prepared by silver-sheathingmethod.The relationship between processing,microstructure and property was discussed.The results of criti-cal current density measurement at 77.7 K with different applied magnetic field are as follows:je=2.87×104A/cm2（OT）,Je=4100 A/cm2（H I.H||S.1T）and Je-B characteristics are obviously improved withtemperature decreasing from 77 K to 4.2 K.Microstructtlre observations indicate that intermediate pressingwith subsequent heat-trcating could lower the porosity of superconductor inside the silver sheath,and reducethe amount and size of non-superconducting phases,leading phases,leading to the formation of a strong c-axis-orientedtexture,and the emergence of high dislocation density within the 2223 grains,and consequently the J（?）andJe-B characteritics were improved.
叶斌，周贻茹，曾荣，周敏，张建国，刘安生，王俊升，袁冠森，崔长庚，李山林，张进龙，景秀年，金新
摘 要：<正> Bi-based 2223 superconducting tapes with high critical current densities were prepared by silver-sheathingmethod.The relationship between processing,microstructure and property was discussed.The results of criti-cal current density measurement at 77.7 K with different applied magnetic field are as follows:je=2.87×104A/cm2（OT）,Je=4100 A/cm2（H I.H||S.1T）and Je-B characteristics are obviously improved withtemperature decreasing from 77 K to 4.2 K.Microstructtlre observations indicate that intermediate pressingwith subsequent heat-trcating could lower the porosity of superconductor inside the silver sheath,and reducethe amount and size of non-superconducting phases,leading phases,leading to the formation of a strong c-axis-orientedtexture,and the emergence of high dislocation density within the 2223 grains,and consequently the J（?）andJe-B characteritics were improved.
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