Pd-C和Ru-C固定点的热力学和ITS-90温度测量  

Temperature Measurement of Pd-C and Ru-C Cells at NIM

作　　者：卢小丰[1] 张婷婷 董伟[1] 唐小洁 原遵东[1] 王铁军[1] LU Xiaofeng;ZHANG Tingting;DONG Wei;TANG Xiaojie;YUAN Zundong;WANG Tiejun(National Institute of Metrology,Beijing 100029,China)

机构地区：[1]中国计量科学研究院,北京100029

出　　处：《计量科学与技术》2021年第5期50-54,共5页Metrology Science and Technology

基　　金：国家重点研发计划项目(2016YFF0200101)。

摘　　要：报告了中国计量科学研究院在参与高温固定点热力学温度国际联合研究后对Pd-C和Ru-C两个新高温固定点的研究成果,为Pd-C(1492℃)和Ru-C(1953℃)设计了两种类型坩埚,可用于校准辐射温度计和高温热电偶。Pd-C和Ru-C的国际温标值(T90)是由固定点-基准高温计外推测量,热力学温度(T)则利用精密光电高温计LP4测量获得,其中LP4经过带有热力学温度值的Co-C(1324℃)、Pt-C(1738℃)和Re-C(2474℃)内插分度。实验结果表明:Pd-C和Ru-C的T与T90之间的差值分别为0.25 K和0.29 K;Pd-C的T和T90的不确定度分别为0.32 K和0.45 K,Ru-C分别为0.49 K和0.50 K。研究成果不仅为高温固定点的校准推广应用,也为传递热力学温度建立了重要基础。The results of the research on two new eutectic fixed point cells, Palladium-Carbon(Pd-C) and RutheniumCarbon(Ru-C), conducted by the National Institute of Metrology(NIM) after participating in an international joint study on high-temperature fixed point cells thermodynamic temperatures are reported. Two types of crucibles were designed for Pd-C(1492 ℃) and Ru-C(1953 ℃), which can be used to calibrate radiation thermometers and high-temperature thermocouples.The International Temperature Scale of 1990 values(T90) of Pd-C and Ru-C are measured extrapolated from a primary standard thermometer, and the thermodynamic temperature(T) is obtained using a precision photoelectric pyrometer LP4 measurement, where LP4 is interpolated and indexed by Co-C(1324 ℃), Pt-C(1738 ℃) and Re-C(2474 ℃) with thermodynamic temperature values. The experimental results show that the differences between T and T90 of Pd-C and Ru-C are 0.25 K and 0.29 K, respectively;the uncertainties of T and T90 of Pd-C are 0.32 K and 0.45 K, and those of Ru-C are 0.49 K and 0.50 K. The results not only promote the application of calibration for high-temperature fixed points, but also establish an important basis for transferring thermodynamic temperature.

关 键 词：计量学 高温固定点 辐射测温 热力学温度 不确定度 坩埚 

分 类 号：TB94[一般工业技术—计量学]