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| Feasibility Study on the Application of Organic Matter to the Temperature Fixed Point in Marine Warm Zone |
| GAO Chuan-ji1,LING Zhong-qian1,LI Ting2,SUN Jian-ping2,WANG Guang-yao2,CHEN Ze-chuan1,LI Jia-hao2 |
1. College of Metrology & Measurement Engineering, China Jiliang University, Zhejiang Hangzhou310018, China
2. National Institute of Metrology, Beijing 100029, China |
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Abstract The development of a new temperature fixed point suitable for the ocean temperature zone -5～35℃ has become an important means to improve the level of ocean temperature measurement. Aiming at the lower temperature range of ocean temperature zone which gallium base alloy cannot cover, the feasibility of using high purity tridecane and tetradecane as fixed points was explored. The phase transition characteristics were studied by adjusting different preheating and melting temperatures. The results show that the melting temperature plateau of tridecane can last for more than 35h, and the recurrence level of the temperature plateau is better than 1mK. The melting temperature plateau of tetradecane can last for more than 45h, and the recurrence of the temperature plateau is better than 1mK. Both of them have the possibility of becoming the fixed point of temperature. The research results provide supplementary experimental data support for the fixed point of ocean warm zone.
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Received: 18 November 2022
Published: 17 July 2023
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2023, Vol. 44 
