基于准绝热的锌固定点复现装置  

Zinc Fixed Point Realization Apparatus Based on the Quasi Adiabatic

作　　者：王伟 孙建平[2] 曾凡超[3] 方信昀[4] WANG Wei SUN Jian-ping ZENG Fan-cao FANG Xin-yun(Guangzhou Institute of Measuring and Testing Technology, Guangzhou, Guangdong 510030, China National Institute of Metrology, Beijing 100029, China Chengdu University of Technology, Chengdu, Sichuan 610059 ,China Suzhou Institute of Measuring and Testing Technology, Suzhou, Jiangsu 215128, China)

机构地区：[1]广州计量检测技术研究院,广东广州510030 [2]中国计量科学研究院,北京100029 [3]成都理工大学,四川成都610059 [4]苏州市计量测试研究所,江苏苏州215128

出　　处：《计量学报》2016年第6期591-595,共5页Acta Metrologica Sinica

基　　金：国家自然科学基金(51206152)

摘　　要：ITS-90温标固定点温坪受到诸多方面的影响，温场是其中重要影响因素之一。为提升温场性能弥补漏热造成的影响，借鉴低温固定点中广泛采用的绝热原理，设计基于准绝热的锌固定点装置，温场梯度性能由传统固定点的100mK提升至20mK，固定点高纯金属使用量由2．0kg降至200g。实验结果表明该装置的温坪可持续时间较长，复现性0．1mK，既能大幅度提升温场性能，同时达到了装置小型化、可重复使用经济实用的目的，又为高纯金属中微量杂质对相变温度的影响评估降低温场因素的干扰提供研究基础。The plateau of fixed-point realization is affected by many aspects in ITS-90, temperature uniformity is one of the most important factors. To improve the temperature field performance and reduce the influence caused by leakage, refer to the adiabatic principle which was widely used in the apparatus of low temperature fixed point, a zinc fixed point apparatus based on the quasi adiabatic is design. The temperature grads properties 100 mK of the traditional fixed point is reducted to 20 mK, the usage amount of metal is also reduced from 2.0 kg to 200 g. The experimental results show that the temperature plateau sustainable long time, and the reproducibility of the apparatus can be reduced to 0. 1 mK. The apparatus can greatly improve the properties of temperature field, reduce the factors of interference evaluation for effect of trace impurities in high purity metal on the phase transition temperature. The miniaturization of the device can be used repeatedly to achieve economic and practical purposes, and also give the impact assessment of trace impurities in high purity metal phase change temperature which provides the basis for reduction interference of the temperature field.

关 键 词：计量学 锌固定点 准绝热 杂质评估 

分 类 号：TB942[一般工业技术—计量学]