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一、前言利用热电偶作为低温测试的一次元件,具有灵敏端小,可测局部温度,热容最小,制做简单,使用方便等优点。所以,可在低温工程和试验中应用。目前在国外,如美国,完成了铜-康铜,镍铬-康铜,镍铬-镍铝和金铁(0.07原子％)-镍铬等热电偶的分度试验。镍铬-康铜热电偶导热系数小,均匀性良好,可在20K到1000℃的范围内连续使用。在毛主席“自力更生”方针指引下,我
First, the preface The use of thermocouples as a low temperature test components, with sensitive small end, measurable local temperature, minimum heat capacity, making simple, easy to use and so on. Therefore, it can be used in low temperature engineering and testing. At present, in foreign countries such as the United States, the indexing tests for thermocouples such as copper-constanta, nichrome-nickel, nickel-chromium-nickel-aluminum and gold-iron (0.07 atomic% Nickel-chromium - Hong Tong thermocouple thermal conductivity of small, good uniformity, in the range of 20K to 1000 ℃ continuous use. Under Chairman Mao’s “self-reliance” guideline, I am