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从1990年起全世界要统一采用新的国际温标(ITS-90)。本文介绍了为做好准备工作,中国计量科学研究院和联邦德国技术物理研究院所进行的银凝固点容器和铝凝固点容器直接比对的情况。所用银样品和铝样品的名义纯度均为99.9999%(按重量)。结果表明,所有参加比对的银凝固点和铝凝固点分别在1mk范围内相一致。
Since 1990, the world has adopted a new international temperature scale (ITS-90). This article presents a direct comparison of silver freezing point containers and aluminum freezing point containers for preparation, prepared by the Chinese Institute of Metrology and the German Federal Institute of Technical Physics. The nominal purity of the silver and aluminum samples used was 99.9999% by weight. The results show that all the participating silver solidification point and aluminum solidification point are consistent in the range of 1mk.