高温超导导线Ic-B特性的测量

摘要

测量了高温超导导线Bi-2223/Ag的临界电流值与外加磁场的依赖性关系。实验结果表明：超导线材的临界电流不仅与磁场大小有关，而且还与外磁场的方向有关。外磁场越大，临界电流值越小；Bi-2223/A g呈扁带状，临界电流对磁场的依赖性呈现各向异性。该实验与高温超导材料临界温度测量实验结合为高温超导电性能综合测试实验，为学生自主研究提供了拓展空间。%The dependence of critical current on magnetic field in high-temperature superconductor Bi-2223/Ag was measured .The experimental results indicated that the critical current of Bi-2223/Ag wire depended on both magnitude and orientation of the applied magnetic field .This comprehensive testing experiment was combined with the critical temperature test of high-temperature superconduc-tor to make more space for students to explore .