Theoretical Model and Verification of Annealing Characteristic of the New Standard Platinum Resistance Thermometer
YU Fan1, SUN Jian-ping2, LI Ting2, ZHU Tian-meng3, WANG Cheng-ke3
1. School of Energy and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China
2. National Institute of Metrology, Beijing 100029, China
3.China Jiliang University, Hangzhou, Zhejiang 310018, China
Abstract：According to the theory of recrystallization kinetics, two theoretical models were established for the change law of the triple point resistance of water with time during the first annealing of a new standard platinum resistance thermometer (SPRT), it was concluded that that the dimensionless resistance value change have the dimensionless resistance value change has the characteristics of an exponential function and the linear characteristic of the double logarithmic dimensionless resistance value change function. Based on the experimental data of 15 SPRTs annealed at 660 ℃, the range and average value of annealing parameters and annealing index were obtained. The calculated results of theoretical model showed that the stability of SPRTs could reach about 1mK after 1 000 hours. The annealing average stability curve of SPRT could reflect the change law of the annealing stability of the thermometer to a certain extent, and could provide a theoretical prediction and reference for the reasonable annealing process.
于帆,孙建平,李婷,朱天梦,王成科. 新制标准铂电阻温度计退火特性理论模型及验证[J]. 计量学报, 2021, 42(6): 759-764.
YU Fan, SUN Jian-ping, LI Ting, ZHU Tian-meng, WANG Cheng-ke. Theoretical Model and Verification of Annealing Characteristic of the New Standard Platinum Resistance Thermometer. Acta Metrologica Sinica, 2021, 42(6): 759-764.
［1］王玉兰, 邱萍. 铂电阻温度计稳定性的研究 ［J］. 中国计量, 2001, (8): 37-38.
［2］ 金志军, 邱萍, 刘薇. 退火温度和退火时间对精密铂电阻温度计影响分析 ［J］. 计量与测试技术, 2019, 46 (4): 1-2.
Jin Z J, Qiu P, Liu W. Study on Annealing Temperature and Annealing Time of Precision Platinum Resistance Thermometers ［J］. Metrology & Measurement Technique, 2019, 46 (4): 1-2.
［3］ 邓小龙, 孙建平, 乐恺, 等. 退火对标准铂电阻温度计性能影响的研究 ［J］. 计量学报, 2015, 36 (1): 26-30.
Deng X L, Sun J P, Le K, et al. The Annealing Effect on the Performance of the Standard Platinum Resistance Thermometer ［J］. Acta Metrologica Sinica, 2015, 36 (1): 26-30.
［4］ 牛亚路, 宋凯, 孙建平, 等. 空气环境下PtO2分解实验的研究 ［J］. 计量学报, 2018, 39 (1): 33-38.
Niu Y L, Song K, Sun J P, et al. Research on the Decomposition Experiment of PtO2 in Air Environment ［J］. Acta Metrologica Sinica, 2018, 39 (1): 33-38.
［5］ 国家质量监督检验检疫总局. JJF 1178—2007 用于标准铂电阻温度计的固定点装置校准规范 ［S］. 2007.
［6］ Strouse G F. NIST implementation and realization of the ITS-90 over the range 83K to 1235K: reproducibility, stability, and uncertainties ［J］. Temperature: Its Measurement and Control in Science and Industry, 1992, 6 (1): 169-174.
［7］ BIPM. Supplementary information for the international temperature scale of 1990 ［R］. 1997.
［8］ Nguyen M K, Ballico M J. APMP-K3: Key comparison of realizations of the ITS-90 over the range-38.8344 ℃ to 419.527 ℃ using an SPRT ［J］. Metrologia, 2007, 44 (1A): 31.
［9］ 余永宁. 金属学原理 ［M］. 北京: 冶金工业出版社, 2000.
［10］ Beck J V, Arnold K J. Parameter estimation in enginee-ring and science ［M］. New York: John Wiley, 1977.
［11］ 高凯,蒋庆,孙建平,等. 铂丝位错特性对标准铂电阻温度计稳定性影响的研究［J］. 计量学报, 2020, 41(11): 1352-1357.
Gao K,Jiang Q,Sun J P,et al. Influence of Platinum Dislocation Characteristics on the Stability of Standard Platinum Resistance Thermometer［J］. Acta Metrologica Sinica, 2020, 41(11): 1352-1357.
2021, Vol. 42 
