高精度复现铟凝固点

doi:10.3969/j.issn.1000-1158.2021.05.07

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Abstract A stainless-steel-cased indium cell was utilized to precisely realize the indium melting and freezing plateaus using a continuous heat flux method. The liquidus temperatures of indium were determined by one linear fitting method, and the differences between the liquidus temperatures and the maximum values of the freezing plateaus were regarded as indicators for evaluating the quality of the indium cell. The results showed that these differences were within 0.27mK. Also, the vertical temperature uniformity within 16cm from the thermometer well bottom did not exceed 13mK. Therefore, the stainless-steel-cased cell can meet the requirements for high-precision temperature dissemination. In addition, the influence of furnance setting temperatures on the duration of the freezing plateau and supercooling were also studied.

Key words： metrology indium freezing point plateau realization method vertical-temperature profile supercooling

Received: 18 August 2020 Published: 24 May 2021

PACS:

TB942

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	Articles by authors
	WANG Ning
	YAN Xiao-ke
	ZHANG Ming-yu
	HE Pei

Cite this article:

WANG Ning,YAN Xiao-ke,ZHANG Ming-yu, et al. Highly Precise Realization of the Indium Freezing Point[J]. Acta Metrologica Sinica, 2021, 42(5): 582-588.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.05.07 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I5/582

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