标准摘要
[中文适用范围]： IEC 61788的这一部分涵盖了测定具有整体结构和圆线形状的短直Ag和/或Ag合金护套Bi-2212和Bi-2223氧化物超导体的直流临界电流的测试方法或含有单核或多核氧化物的扁平带或方形带。该方法适用于临界电流小于 500 A 且 n 值大于 5 的超导体。测试在施加和不施加外部磁场的情况下进行。对于磁场中的所有测试，磁场垂直于样本的长度。在磁场中测试胶带样本时，磁场平行或垂直于较宽的胶带表面（如果是正方形，则为一个表面）。在测试过程中，将测试样品浸入液氦浴或液氮浴中。本标准给出了例行试验所允许的与本试验方法的偏差以及其他具体限制。 [外文原描述]： This part of IEC 61788 covers a test method for the determination of the dc critical current of short and straight Ag- and/or Ag alloy-sheathed Bi-2212 and Bi-2223 oxide superconductors that have a monolithic structure and a shape of round wire or flat or square tape containing mono- or multicores of oxides. This method is intended for use with superconductors that have critical currents less than 500 A and n-values larger than 5. The test is carried out with and without an applying external magnetic field. For all tests in a magnetic field, the magnetic field is perpendicular to the length of the specimen. In the test of a tape specimen in a magnetic field, the magnetic field is parallel or perpendicular to the wider tape surface (or one surface if square). The test specimen is immersed either in a liquid helium bath or a liquid nitrogen bath during testing. Deviations from this test method that are allowed for routine tests and other specific restrictions are given in this standard.
英文名称Superconductivity - Part 3: Critical current measurement - DC critical current of Ag- and/or Ag alloy-sheathed Bi-2212 and Bi-2223 oxide superconductors