摘 要：長期以來,在接觸測溫學(xué)、非接觸測溫學(xué)和輻射度學(xué)領(lǐng)域?qū)︺~凝固點(diǎn)（1084.62℃）以上高性能溫度固定點(diǎn)有著迫切的需求。隨著高溫金屬（碳化物）-碳共晶熔點(diǎn)的發(fā)現(xiàn)，這個(gè)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(diǎn)的國際研究計(jì)劃，這個(gè)研究的目的是用新的定義替代當(dāng)前溫標(biāo)ITS-90在銀點(diǎn)（961.78℃）以上的定義，使不確定度比當(dāng)前溫標(biāo)低5-10倍。
關(guān)鍵詞：ITS-90；溫標(biāo)；高溫固定點(diǎn)；金屬-碳共晶點(diǎn)；輻射測溫法；校準(zhǔn)；復(fù)現(xiàn)性；不確定度
中圖分類號(hào)：TB942 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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
