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由于约瑟夫森电压标准的迅速发展,1975年第十四次电学咨询委员会决定采用约瑟夫森效应来保持电压单位,但在采用约瑟夫森电压标准检定的周期之间,仍然要用一组高精度的标准电池来保持电压单位。研究结果表明,各国计量部门之间电压单位的一致性,受到作为传递标准的标准电池的准确度的限制。镉标准电池年稳定性高,短期稳定性更好,但温度系数较大,故对控温的要求较高,而这方面是比较困难的。如果我们能研制出一种温度系数小、稳定性高的低温度系数标准电
Due to the rapid development of the Josephson voltage standard, the Fourteenth Electrical Advisory Committee decided in 1975 to adopt the Josephson effect to maintain the voltage unit. However, a cycle of high-precision standards Battery to keep the voltage unit. The results of the study show that the consistency of the voltage units among the metrological units in each country is limited by the accuracy of the standard battery as a delivery standard. Cadmium standard battery high stability, short-term stability is better, but the temperature coefficient is larger, so the higher temperature control, and this is more difficult. If we can develop a low temperature coefficient, high stability and low temperature coefficient of standard electricity