SF_(6)及CO_(2)三相点替代Hg三相点内插方法可行性探究  

Study on the Feasibility of Interpolation Method of SF_(6)and CO_(2) Triple Point Replacement of Mercury Triple Point

作　　者：杨锦楠 潘江[1] 孙建平[2] 李婷[2] 汪洪军[2] 于娇 阮一鸣 王光耀 YANG Jin-nan;PAN Jiang;SUN Jian-ping;LI Ting;WANG Hong-jun;YU Jiao;RUAN Yi-ming;Wang Guang-yao(China Jiliang University,Zhejiang,Hangzhou 310018,China;National Institute of Metrology,Beijing 100029,China;Xi an Polytechnic University,Shaanxi,Xi an 710048,China)

机构地区：[1]中国计量大学,浙江杭州310018 [2]中国计量科学研究院,北京100029 [3]西安工程大学,陕西西安710048

出　　处：《计量学报》2022年第2期151-156,共6页Acta Metrologica Sinica

基　　金：中国计量科学研究院基本科研业务费重点领域(AKYZD2004-3)。

摘　　要：在不改变90国际温标内插方程形式的基础上,针对83.8058 K到273.16 K温区,分析了六氟化硫(SF_(6))和二氧化碳(CO_(2))三相点替代汞(Hg)三相点后,导致的内插方程变化带来的温度偏差以及传播不确定度变化规律。研究结果表明:SF_(6)和CO_(2)三相点替代Hg三相点后,该方程在该温区仍具有适用性;在复现不确定度相同的情况下,Hg三相点、SF_(6)三相点和CO_(2)三相点带来的整个温区的传播不确定度依次减小,并预测在中国计量科学研究院SF_(6)三相点的复现不确定度优于0.25 mK(k=1),CO_(2)三相点不确定度复现优于0.27 mK(k=1)可以维持国家温度基准水平不变。For the temperature range from 83.8058 K to 273.16 K,the replacement of the mercury triple point by SF_(6)or CO_(2)triple point were theoretically analyzed.Without changing the form of interpolation equation of ITS-90,the changes of the temperature deviation and the propagation uncertainty before and after replacement were discussed.The results show that the equations defined by ITS-90 still have the applicability in the temperature range even when SF_(6)triple point and CO_(2)triple point replace Hg triple point.Under the same level of the realization uncertainties of the three fixed points,the propagation uncertainty of Hg,SF_(6)and CO_(2)triple points decreases in turn over the whole temperature range.It is predicted that the corresponding temperature primary standard level of NIM has no change when the realization uncertainty of SF_(6)and CO_(2)triple points is less than 0.25 mK(k=1)and 0.27 mK(k=1),respectively.

关 键 词：计量学 90国际温标 汞三相点 六氟化硫三相点 二氧化碳三相点 传播不确定度 

分 类 号：TB942[一般工业技术—计量学]