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）-碳共晶熔點的發現，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。
關鍵詞：ITS-90；溫標；高溫固定點；金屬-碳共晶點；輻射測溫法；校準；復現性；不確定度
中圖分類號：TB942 文獻標識碼：A 文章編號：1672-4984（2007）04-0016-04
Trend and development of international research for high temperature fixed-points
CHEN Gui-sheng
（National Institute of Measurement and Testing Technologe，Chengdu 610021，China）
Abstract: 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 (carbide)-carbon (M(C)-C) eutectic melting points, this requirement will soon be met. This paper briefly introduced the research project for high temperature metal (carbide)-carbon (M(C)-C) eutectic 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 present temperature scale.
Key words: ITS-90； Temperature scale; High performance fixed-point; Metal-carbon（M-C） eutectic points; Radiation thermometry; Calibration; Reproducibility; Uncertainty
