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| Research on Phase Change Characteristic of Miniature Gallium Fixed-point Using Quasi-adiabatic Measurement Method |
| XU Chun-yuan1,2,XIA Cai-juan1,HAO Xiao-peng2,SUN Jian-ping2,WEN Ping2,SONG Jian2,YUAN Zun-dong2 |
1. School of Science, Xi'an Polytechnic University, Xi’an, Shaanxi 710048, China
2. National Institute of Metrology, Beijing 100029, China |
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Abstract The formation process of miniature Ga fixed-point which can be used for in situ calibration, the structure and working principle of the quasi-adiabatic testing system are described.The phase change characteristic of miniature Ga fixed-point is measured using this quasi-adiabatic testing system. The results show that the melting point of Ga fixed-point has strong linear relationship with the heating power. The linear fitting factor R2 is 0.995 7. The lower the heating poweris, the closer to the standard temperature of Ga fixed-point it becomes. Further more, the repeatability of the melting points of Ga is better than 2 mK under the same quasi-adiabatic testing system.
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Received: 05 April 2016
Published: 28 December 2016
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Corresponding Authors:
Xiaopeng Hao
E-mail: haoxp@nim.ac.cn
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2017, Vol. 38 
