单圆柱微波谐振法测量热力学温度的研究

doi:10.3969/j.issn.1000-1158.2018.02.24

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Abstract Using the microwave resonant method, the thermodynamic temperature is measured in the temperature range from 253 K to 303 K based on the gas refractive index primary thermometry by using the properties for argon from“ab initio”quantum mechanics calculation theory and experimental results and the microwave resonant method. Four transverse magnetic microwave resonance frequencies were measured to obtain the refractive index in argon at 700 kPa, the consistence of the refractive index from different microwave modes was better than 1×10-8. The thermodynamic temperature then was determined by combining the refractive index measurement results and the viral equation of state for argon. The uncertainty of the difference of the thermodynamic temperature T and the ITS-90 international temperature T90 was evaluated to be 11.6 mK, and the results agreed with the Consultative Committee for Thermometry (CCT) recommendation values well. The uncertainty from this method will be decreased with the development of the theoretical calculation for argon and the improvement of the pressure measurement in the next future.

Key words： metrology thermodynamic temperature microwave resonance cylindrical resonator refractive index in gases argon

Received: 16 December 2017 Published: 11 February 2018

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TB942

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	Articles by authors
	CUI Jin
	FENG Xiao-juan
	LIN Hong
	ZHANG Jin-tao
	HUAN Ke-wei

Cite this article:

CUI Jin,FENG Xiao-juan,LIN Hong, et al. Thermodynamic Temperature Measurement Using Single Cylindrical Microwave Resonator[J]. Acta Metrologica Sinica, 2018, 39(2): 255-261.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2018.02.24 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2018/V39/I2/255

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