临界弯曲直径测量 液氮温区Bi-2223超导带材的 临界弯曲直径测量 Critical bending diameter measurement— Critical bending diameter measurement of Bi-2223 superconducting wires in liquid nitrogen temperature  ICS  29.050；77.040.01 CCS  H 62；H 21   中华人民共和国国家标准 GB/T 44371—2024 2024-08-2 3发布 2025-03-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 引言   ·····································································································   Ⅳ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     原理   ··································································································   2 5     测量装置   ······························································································   2      5.1     概述   ······························································································   2      5.2     测量组件   ·························································································   2      5.3     U﹘I特性测量系统   ··············································································   3 6     样品准备和安装   ······················································································   3      6.1     样品尺寸要求   ····················································································   3      6.2     样品的安装   ······················································································   4 7     测量步骤   ······························································································   4      7.1     初始临界电流测量   ···············································································   4      7.2     弯曲状态下临界电流测量   ········································································   4      7.3     临界弯曲直径测定   ···············································································   5      7.4     多次冷热循环的影响（可选）   ···································································   5 8     结果计算   ······························································································   5      8.1     临界电流计算   ····················································································   5      8.2     n﹘值计算（可选）   ···············································································   6      8.3     临界弯曲直径计算   ···············································································   6      8.4     测量不确定度   ····················································································   6 9     测量报告   ······························································································   7      9.1     被测样品详情   ····················································································   7      9.2     测量条件   ·························································································   7      9.4     多次冷热循环对Ic的影响（可选）   ······························································   7      9.5     其他信息   ·························································································   7 附录 A （资料性）　一种临界弯曲直径测量组件及其使用示例   ········································   8 附录 B （资料性）　不确定度评定   ·····································································   13 参考文献   ································································································   17 GB/T 44371—2024     Ⅰ