Pant, Umesh and Meena, Hansraj and Gupta, Gaurav and Shivagan, D. D. (2019) Development and Long-Term Stability Assessment of Co-C Eutectic Fixed Point for Thermocouple Thermometry. International Journal of Thermophysics, 40 (8). pp. 80-93. ISSN 0195-928X

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The long-term stability assessment on the Co-C eutectic fixed point cell indigenously developed at CSIR-National Physical Laboratory, India is presented. Metal-carbon eutectic fixed points are promising candidates for the direct traceability to high-temperature thermometry and radiometry. The acceptance of any fixed point as a temperature reference cell depends on its repeatability, reproducibility, and long-term stability. In this paper, we report the detailed investigations on development and realization of Co-C cell and comparison of successive 3-year data to evaluate the long-term stability and robustness of cell. We assigned melting transition temperature to Co-C cell by using Type-S thermocouple, calibrated on ITS-90 fixed points. The cell has been subjected for 270h of melt-freeze cycle since its construction in 2014 and exhibits excellent thermo-mechanical stability. The Co-C melting transition temperature and measurement uncertainty were estimated by using the same Type-S thermocouple, for 3years from 2015 to 2017, and overall drift for the cell was estimated to be 0.1 degrees C, after normalizing the drift of the thermocouple.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Subjects: Mechanics
Applied Physics/Condensed Matter
Physical Chemistry/Chemical Physics
Depositing User: Mr. Yogesh Joshi
Date Deposited: 06 Feb 2020 07:28
Last Modified: 06 Feb 2020 07:28

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