低温循环对标准铂钴电阻温度计稳定性影响的实验研究  

Experimental Research on the Influence of Low Temperature Cycle on the Stability of Standard Platinum Cobalt Resistance Thermometer

作　　者：胡江风 宋耀楠 潘长钊 李福洪 张海洋 张震 马英 罗必得 戴巍[2,3] 罗二仓 高波[1,2] HU Jiangfeng;SONG Yaonan;PAN Changzhao;LI Fuhong;ZHANG Haiyang;ZHANG Zhen;MAYing;LUO Bide;DAIWei;LUO Ercang;GAO Bo(TIPC-LNE Joint Laboratory on Cryogenic Metrology Science and Technology,Technical Institute of Physics and Chemistry,Chinese Academy of Science,Beijing 100190,China;Key Laboratory of Cryogenic Engineering,Technical Institute of Physics and Chemistry,Chinese Academy of Science,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;LCM-LNE-Cnam,61 rue du Landy,93210 La Plaine-Saint Denis,France;Kunming Dafang Automatic Control Technology Co.,Ltd,Kunming 650221,China)

机构地区：[1]中国科学院理化技术研究所中法低温计量科学与技术国际联合实验室,北京100190 [2]中国科学院理化技术研究所中国科学院低温工程学重点实验室,北京100190 [3]中国科学院大学,北京100049 [4]LCM-LNE-Cnam,61 rue du Landy,93210 La Plaine-Saint Denis,France [5]昆明大方自动控制科技有限公司,昆明650221

出　　处：《真空与低温》2021年第5期449-456,共8页Vacuum and Cryogenics

基　　金：国家重点研发计划项目(2016YFE0204200);国家重大科研仪器研制项目(51627809);中国科学院科研仪器设备研制项目(ZDKYYQ20210001);中国科学院国际大科学培育专项(1A1111KYSB20160017);中国科学院理化技术研究所所长基金(E0A9T10301);中国科学院低温工程学重点实验室开放课题(CRYO202012)。

摘　　要：低温,尤其是低于24.5561 K(氖三相点)温区,常用的三种标准电阻温度计是铂、铑铁和铂钴电阻温度计。铂钴电阻温度计在20 K以下的灵敏度和稳定性与铑铁电阻温度计相近,可作为精密测温的标准器使用,越来越受到低温界的重视。本文研究了自研的铂金壳标准铂钴电阻温度计低温温循后的短期稳定性,介绍了标准铂钴电阻温度计低温温循考核流程、水三相点标定装置和用于温度计液氮温循的装置,完成了4支标准铂钴电阻温度计在室温至液氮温区的温循考核测试。经过20次温循后,水三相点的稳定性测试结果显示,最优的铂钴温度计稳定性为0.3 mK。There are three commonly used resistance thermometers at low temperature,especially below 24.5561 K(neon triple point),mainly including platinum resistance thermometers,rhodium-iron resistance thermometers and platinum-cobalt resistance thermometers.The latter platinum-cobalt resistance thermometers,are similar to rhodium-iron resistance thermometers in sensitivity and stability below 20K,can be used as a standard for accurate temperature measurement,drawing more and more attention from the cryogenic community.We study the low-temperature performance of the deve loped standard platinum-cobalt resistance thermometers with a platinum-shell structure.This article mainly focuses on the experimental study of cryogenic cycle on the standard platinum-cobalt resistance thermometers.This article only introduces the short-term stability after the low temperature cycle,including the test process of standard platinum-cobalt resistance thermometers,the calibration of the water triple point and the device for liquid nitrogen temperature cycle.We have completed temperature cycle assessment of 4 standard platinum-cobalt resistance thermometers from liquid nitrogen temperature to room temperature.After 20 temperature cycles,the stability of thermometers were tested at the triple point of water,and the results showed that the optimal stability was 0.3 mK.

关 键 词：标准铂钴电阻温度计 水三相点 低温温循 稳定性考核 

分 类 号：O514.2[理学—低温物理]