高温固定点的国际研究趋势与发展

上帝

陈桂生

中国测试技术研究院,四川成都610021

摘　要:长期以来，在接触测温学、非接触测温学和辐射度学领域对铜凝固点（1084.62℃）以上高性能温度固定点有着迫切的需求。随着高温金属（碳化物）磺共晶熔点的发现，这个需求将很快得到满足。本文简要介绍了高温金属（碳化物）-碳共晶固定点的国际研究计划，这个研究的目的是用新的定义替代当前温标ITS-90在银点（961.78％）以上的定义，使不确定度比当前温标低5-10倍。[著者文摘]

Trend and development of international research for high temperature fixed-pointsCHEN Gui-sheng National Institute of Measurement and Testing Teehnologe,Chengdu 610021, ChinaAbstract:There has been an urgent requirement for high performance fixed-point above the copper freezing point （1084.62℃）,in contact thermometry, non-contact thermometry and radiometry for a long term. With the discovery of high temperature metal （earbide）-earbon （M（C）-C） euteetie melting points, this requirement will soon be met. This paper briefly introduced the research project for high temperature metal （earbide）-earbon （M（C）-C） euteetie fixed- points in the world. The purpose of the research is to substitute the current definition of ITS-90 above the silver point（961.78℃） with a new definition, make uncertainty 5-10 times lower than oresent temoerature scale.[著者文摘]

Key words:ITS-90; Temperature scale; High performance fixed-point; Metal-carbon （M-C） eutectic points;Radiation thermometry; Calibration; Reproducibility; Uncertainty