高溫固定點的國際研究趨勢與發展

陳桂生

中國測試技術研究院,四川成都610021

摘　要:長期以來，在接觸測溫學、非接觸測溫學和輻射度學領域對銅凝固點（1084.62℃）以上高性能溫度固定點有著迫切的需求。隨著高溫金屬（碳化物）磺共晶熔點的發現，這個需求將很快得到滿足。本文簡要介紹了高溫金屬（碳化物）-碳共晶固定點的國際研究計劃，這個研究的目的是用新的定義替代當前溫標ITS-90在銀點（961.78％）以上的定義，使不確定度比當前溫標低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