论文部分内容阅读
一、概况随着科学技术的发展,低温领域已为越来越多的工业生产、军事工程及理论研究所占据,所以低温测量的重要性日益增加,对于低温测量元件的要求和精度日趋提高。目前国际上低温工程领域中常采用的热电偶材料有铜或铁对康铜,金钴对中性银或铜。近年来金铁合金对镍铬,热电偶在10K以上具有较大灵敏度,已引起世界各国重视,另外还有镍铬对镍铝(或考铜)等热电偶材料,根据其各有的优点和缺点,分别选用于不同的场合和温度范围。铜—康铜热电偶不但能满足测量低温的要求,较之上述热电偶具有使用方便,价格便
I. Overview With the development of science and technology, the field of low temperature has been occupied by more and more industrial production, military engineering and theoretical research, so the importance of low temperature measurement is increasing day by day, and the requirements and accuracy of low temperature measuring components are increasing day by day. At present the thermocouple materials commonly used in the field of low temperature engineering in the world are copper or iron to Constantan, gold and cobalt to neutral silver or copper. In recent years, ferroalloy has great sensitivity to NiCr and thermocouple above 10K, which has attracted the attention of all countries in the world. In addition, NiCr-based thermocouple materials such as Ni-Al (or Kao-Cu) have their own advantages and disadvantages , Were selected for different occasions and temperature range. Copper - Hong Tong copper thermocouple can not only meet the requirements of measuring low temperature, compared with the thermocouple easy to use, the price will be