Abstract：The replacement of the mercury triple point from the set of the defining points consituting the International Temperature Scale ITS-90 is indispensable in correspondence to the prohibition action of mercury from commercial trade. The research with the replacement of the mercury triple point is a hot point in the international thermometry community. Finishing such an objective, the thermometric properties of candidates are required to agree with the levels of the triple point of mercury. In addition, the cost and impact to most of users are acceptable with the replacement, the thermometric technology with the new fixed point(s) is as convenience as the old one. The change for the temperature scale with the replacement has to be addressed for every possibility. The researches on replacing mercury triple point in the international thermometry community are reviewed, and the prospect and suggestions on how to revise the new temperature scale are put forward.
张金涛,梁宇,冯晓娟. 替代汞三相点的研究和新温标展望[J]. 计量学报, 2022, 43(2): 145-150.
ZHANG Jin-tao,LIANG Yu,FENG Xiao-juan. Prospect for Replacement of the Mercury Triple Point and a New Temperature Scale. Acta Metrologica Sinica, 2022, 43(2): 145-150.
［1］CCT. Strategic Planning CCT 2021—2030［R］. Draft 2, 2021.
［2］Realising the redefined Kelvin. EMPIR project, 18SIB02, Real-K. https: //www.researchgate.net/project/Realising-the-redefined-kelvin-18SIB02-Real-K. 2021-10-18.
［3］Rourke P M C. ITS-90 reproducibility, xenon fixed point substitution and new interpolating equations between 13.8033K and 273.16K［J］. Metrologia, 2021, 52: 055004.
［4］Pavese F, Molinar G F. Modern Gas-Based Temperature and Pressure Measurements［M］. New York: Springer, 2006.
［5］Bedford R E, Bonnier G, Maas H, et al. Recommended values of temperature on the International Temperature Scale of 1990 for a selected set of secondary reference points［J］. Metrologia, 1996, 33(2): 133-154.
［6］Michels A, Blaisse B, Koens G. The melting point of mercury and the triple point of carbon dioxide as auxiliary fixed points for the temperature scale［J］. Physica, 1942, 9(3): 356-362.
［7］Michels A, Wassenaar T, Sluyters T, et al. The triple points of carbon dioxide and of argon as fixed points for calibration of thermometers［J］. Physica, 1957, 23(1): 89-94.
［8］Ambrose D. The triple point of carbon dioxide as a thermometric fixed point［J］. British Journal of Applied Physics, 1957, 8(1): 32.
［9］Lovejoy D R. Some boiling and triple points below 0 degree［J］. Nature, 1963, 197: 353-354.
［10］Hiza M J. Solid-vapor equilibria research on system of interest in cryogenics［J］. Cryogenics, 1970, 10(2): 106-115.
［11］Blanes-Rex R, Fernandez E P A, Guzman F. On the triple point temperature of CO;2［J］. Cryogenics, 1982, 22(3): 113-114.
［12］Pavese F, Ferri D. Ten years of research on sealed cells for phase transition studies of gases at IMGC［C］// AIP Conference Proceedings. 1982, 5: 217-227.
［13］Ancsin J. Development of cryogenic sealed cells as temperature standards—their filling system and the purification of CO;2［J］. Metrologia, 1992, 29(1): 71-78.
［14］Kawamura Y, Matsumoto N, Nakano T. Realization of the triple point of carbon dioxide evaluated by the ITS-90［J］. Metrologia, 2020, 57(1): 015004.
［15］Kawamura Y, Matsumoto N, Nakano T. Corrigendum: Realization of the triple point of carbon dioxide evaluated by the ITS-90 (2020 Metrologia 57 015004) ［J］. Metrologia, 2021, 58(2): 029501.
［16］Liang Y, Zhang J T, Feng X J. Effects of isotopes on the triple points of carbon dioxide and sulfur hexafluoride ［J］. Int J Thermophys, 2021, 42: 142.
［17］Rourke P M C. The triple point of sulfur hexafluoride ［J］. Metrologia, 2016, 53(2): L1-L6.
［18］Tew W L, Quelhas K N. Realizations of the triple point of sulfur hexafluoride in transportable and refillable cells ［J］. Journal of Research of the National Institute of Standards and Technology, 2018, 123(2): 689-728.
［19］Kawamura Y, Nakano T. Evaluation of the triple point temperature of sulfur hexafluoride and the associated uncertainty at NMIJ/AIST ［J］. Metrologia, 2020, 57(1): 347-353.
［20］Li T, Sun J P, Wang H J, et al. Realization and evaluation of the triple point of sulfur hexafluoride ［J］. Metrologia, 2021, 58(3): 8-35.
［21］Hill K D, Steel A G. The triple point of xenon ［J］. Metrologia, 2005, 42(4): 278-88.
［22］Steur P P M, Giraudi D. Preliminary Measurements of the Xenon Triple Point ［J］. Int J Thermophys, 2014, 35: 604-610.
［23］Steur P P M, Rourke P M C, Giraudi D. Comparison of xenon triple point realizations ［J］. Metrologia, 2019, 56(1): 015008.
［24］Quinn T. The ITS-90, the last international temperature scale［C］//TEMPBEIJING 2008. Beijing, 2008.
［25］Hill K D. An evolutionary approach to updating the international temperature scale［C］//AIP. Temperature: Its Measurement and Control in Science and Industry. Los Angeles, California, USA, 2012.
［26］White D R, Rourke P M C. Standard platinum resistance thermometer interpolations in a revised temperature scale ［J］. Metrologia, 2020, 57(3): 035003.
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