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目前,金属材料的电阻率数据都由实验测定。由于很多材料的电阻率均很小,给精密测定增加了困难。我们正在研制的“4.2—90K固体比热容国家标准装置”为电阻率的精密测定提供了条件。
At present, the resistivity data of metal materials are determined experimentally. Due to the small resistivity of many materials, it adds difficulties to precision measurement. We are developing the “4.2-90K solid state heat than the national standard equipment” for the precision measurement of resistivity provided.