摘要
贵金属热电偶具有优良的测温性能。综述了热电偶的制作和使用过程中影响测温准确性的主要因素。在生产过程中要保证原料的纯度,避免杂质污染,控制热电偶不均与热电势;熔炼过程中,合理的浇铸温度、设备和工艺条件能降低热电势的不均匀性。热电偶使用前应充分退火,消除其加工应力产生的晶格畸变;良好的使用环境和必要的避潮保存条件能延长热电偶使用寿命。
The precious metal thermocouples have excellent temperature measuring performance.The main factors influencing the accuracy of the temperature measurement during the manufacture and use of thermocouples were reviewed.In the production process,the raw materials should have high purity,and any impurity contamination should be avoided,and thermocouple unevenness and thermoelectric potential should be minimized.Optimum pouring temperature,technology conditions and appropriate equipment can reduce the inhomogeneity of electromotive force during smelting process.Thermocouples should be fully annealed before using,and the annealing process can eliminate lattice distortion from the processing stress.The service life of the thermocouples can be prolonged under good use environment and dry storage conditions.
作者
李雪娇
屈新鑫
熊雅玲
金英杰
施卫锋
LI Xuejiao;QU Xinxin;XIONG Yaling;JIN Yingjie;SHI Weifeng(Material Academy,Nanjing University of Science and Technology,Nanjing 210094,China;Wuxi International Platinum Co.Ltd.,Wuxi 214192,Jiangsu,China)
出处
《贵金属》
CAS
CSCD
北大核心
2018年第4期74-82,共9页
Precious Metals
关键词
金属材料
热电偶
热电势
测温
生产
使用
metal material
thermocouple
EMF
temperature measurement
production
use
