Standard No.:	GB/T 25897-2020
English Name:	Residual resistance ratio measurement—Residual resistance ratio of Nb-Ti and Nb3Sn composite superconductors
Chinese Name:	剩余电阻比测量 铌-钛（Nb-Ti）和铌三锡（Nb3Sn）复合超导体剩余电阻比测量
Chinese Classification:	H21    Metal physical property test method
Professional Classification:	GB    National Standard
Issued by:	SAMR; SAC
Issued on:	2020-12-14
Implemented on:	2021-7-1
Status:	valid
Superseding:	GB/T 25897-2010 Superconductivity:Residual resistance ratio measurement of Nb-Ti composite superconductors
Language:	English
File Format:	PDF
Word Count:	12500 words
Price(USD):	375.00
Delivery:	via email in 1~5 business day

本标准规定了无应变、无外加磁场条件下铜（Cu）、铜-镍（Cu-Ni）、铜/铜-镍（Cu/Cu-Ni）基体和铝（Al）基体的铌-钛（Nb-Ti）和铌三锡（Nb3Sn）复合超导体剩余电阻比（RRR）的测试方法。本标准适用于剩余电阻比值低于350、横截面小于3 mm2、具有矩形或圆形横截面的一体化超导体的剩余电阻比的测量。对于Nb3Sn复合超导体，样品经反应热处理。