Re-C共晶高温固定点的研制与评价  

Development and Evaluation of Re-C Eutectic High Temperature Fixed Point

作　　者：董伟[1,2] 肖常志[3] 王铁军[2] 段远源[1] 

机构地区：[1]清华大学热科学与动力工程教育部重点实验室,北京100084 [2]中国计量科学研究院,北京100013 [3]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《计量学报》2011年第B12期66-69,共4页Acta Metrologica Sinica

摘　　要：基于直接共晶的灌注方法，研制了混合结构的Re—C共晶高温固定点。利用高温固定点实验系统对其进行了复现实验研究。依据国际温度咨询委员会辐射测温工作组第二工作包（CCT-WG5-WP2）——关于遴选最优高温固定点用于最终热力学温度赋值的标准，对本文灌注的Re—C进行了评价，结果表明其熔化温度短期重复性为3mK、熔化结束温度与熔化起始温度的差198InK，均优于CCT标准参考值。A Re-C cell of hybrid structure was constructed by direct eutectic filling methods, and realized with the HTFP experimental system. The Re-C cell was evaluated according to CCT-WG5-WP2, which mainly focus on construction of HTFP cells for definitive thermodynamic temperature measurements, and the results shows that the short term repeatability of the melting temperature was 3 mK, and the difference between the start and end of melting temperature was 198mK, which were both better than the CCT reference values.

关 键 词：计量学 国际温标 辐射测温 高温固定点 Re—C共晶 

分 类 号：TB942[一般工业技术—计量学]