一个Bi系高温超导带样品的临界电流测定及稳定性实验研究

AN EXPERIMENTAL STUDY ON THE CRITICAL CURRENT MEASUREMENT AND STABILITY OF A Bi-BASE HIGH-Tc SUPERCONDUCTING TAPE SAMPLE

就临界电流测定中地回路、样品电压信号引入检测仪表的极性、和样品放置不同状态经历不同时间对Ｂｉ系复银高温超导带材的临界电流、电压电流特性曲线形态、可逆性及稳定性的影响进行了实验研究。结果表明，电流不确定度为最大值的±０５％。氧化物高温超导材料不宜在空气中保存。

An experimental study was made of the effect of the grounding loop, the polarity of the sample′s voltage to be injected into the test instrument, laying conditions and periods of the sample upon critical current, the shape of the voltagecurrent curves, reversibility and stability of a silversheathed, Bibased highTc superconducting tape sample. The experimental results showed that the current uncertainty is within ±05% of maximum current value. The oxide highTc superconducting tape can not be put in the air for keeping.