高导无氧铜等温压缩系数推算模型研究  

Study on Calculation Model of Isothermal Compressibility of High Conductivity Oxygen-free Copper

作　　者：刘文静 张海洋 高波[1,2,3] 罗二仓 Laurent Pitre[1,4] LIU Wenjing;ZHANG Haiyang;GAO Bo;LUO Ercang;Laurent Pitre(TIPC-LNE Joint Laboratory on Cryogenic Metrology Science and Technology,Technical Institute of Physics and Chemistry(TIPC),Chinese Academy of Science(CAS),Beijing 100190,China;Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry(TIPC),Chinese Academy of Sciences(CAS),Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100490,China;Laboratoire national de métrologie et d'essais-Conservatoire national des arts et métiers(LNE-Cnam),La Plaine-Saint Denis,Paris F93210,France)

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]法国国家计量院,法国巴黎F93210

出　　处：《真空与低温》2022年第5期565-570,共6页Vacuum and Cryogenics

基　　金：国家自然科学基金(52006231,52125602);中国科学院科研仪器设备研制项目(ZDKYYQ20210001);中国科学院低温工程学重点实验室青年科技创新项目(CRYOQN202110);中国科学院青年创新促进会资助(2022028)。

摘　　要：建立了高导无氧铜等温压缩系数推算模型,适用温度范围为5~300 K。通过拟合室温区(260~280 K)、低温区(140~160 K)和深低温区(10~30 K)的高导无氧铜等温压缩系数数据,获得了三组推算模型。在相应条件下,各模型的外推结果均优于文献模型。三组推算模型的平均绝对相对偏差分别为0.199%、0.074%和3.014%。低温区模型推算结果最好,高导无氧铜等温压缩系数在5~25 K之间相对偏差均在0.060%以内,平均绝对相对偏差为0.048%,可满足该温区高导无氧铜等温压缩系数计算准确度的要求。A extrapolation model of isothermal compressibility of oxygen-free high conductivity copper is established,which is applicable in the temperature range of 5~300 K. Three sets of isothermal compressibility extrapolation models are established based on the data of room temperature(260~280 K),low temperature(140~160 K)and extremely low temperature(10~30 K)using this model. The extrapolation accuracy of each model is better than that of the literature model under the corresponding conditions. The average absolute relative deviations of three sets of calculation models are0.199%,0.074% and 3.014% respectively. The extrapolation accuracy of the model in low temperature zone is the highest.The relative deviation of the isothermal compressibility coefficient of oxygen-free high conductivity copper from 5 K to25 K is within 0.060%,and AARD is 0.048%,which can meet the requirements of the calculation accuracy of isothermal compressibility coefficient of oxygen-free high conductivity copper in this temperature zone.

关 键 词：高导无氧铜 等温压缩系数 绝热压缩系数 线性膨胀系数 定压比热 

分 类 号：TB61[一般工业技术—制冷工程]