Bi-In-Sn合金熔化温坪优化方法探索  

Exploration of Bi-In-Sn Alloy Melting Temperature Plateau Optimization

作　　者：阮一鸣 凌忠钱 李婷[2] 孙建平[2] 汪洪军[2] 尹跃 杨锦楠 RUAN Yi-ming;LING Zhong-qian;LI Ting;SUN Jian-ping;WANG Hong-jun;YIN Yue;YANG Jin-nan(College of Metrology&Measurement Engineering,China Jiliang University,Hangzhou,Zhejiang 310018,China;National Institute of Metrology,Beijing 100029,China;Shandong Institute of Metrology,Jinan,Shandong 250014,China)

机构地区：[1]中国计量大学计量测试工程学院,浙江杭州310018 [2]中国计量科学研究院,北京100029 [3]山东省计量科学研究院,山东济南250014

出　　处：《计量学报》2022年第2期176-183,共8页Acta Metrologica Sinica

基　　金：国家重点研发计划(2018YFB0504702);中国计量科学研究院红外遥感定标与计量技术联合实验室2020年度开放课题(AKYKF2009)。

摘　　要：为了提高红外遥感高精度测量水平,研发适用于红外遥感测温范围的次级固定点已成为提高在轨温度标定精度的重要手段。针对红外遥感领域涉及的温度范围(190~350 K),研制了Bi-In-Sn三元合金固定点。为提高三元合金温坪复现水平,采用预熔方法对三元合金固定点进行预处理,分析不同热工况对三元合金温坪的影响,获得适用于该三元合金固定点复现方法。结果表明,适当地预热与预熔能够优化固定点温坪复现水平,优化后的Bi-In-Sn合金熔化温坪持续7 h以上,复现性优于1.3 mK;通过对Bi-In-Sn共晶点赋值获得其温度为333.7318 K,扩展不确定度为3.0 mK(k=2)。In order to improve the high-precision measurement level of infrared remote sensing,exploring and developing secondary fixed points suitable for the infrared remote sensing temperature measurement range has become an important method to improve the accuracy of on orbit temperature calibration.Aiming at the temperature range(190~350 K)involved in the field of infrared remote sensing,Bi-In-Sn ternary alloy fixed point was developed.To improve the reproducibility level of ternary alloy temperature plateau,the ternary alloy fixed point was preproccessed by the pre-melting method,and the effects of different thermal conditions on the ternary alloy temperature plateau were analyzed to obtain the reproduction method suitable for the ternary alloy fixed point.The results show that the reproducibility level of the fixed-point temperature plateau can be optimized through the proper preheating and pre-melting method.The melting temperature plateau of Bi-In-Sn alloy fixed point developed lasts for more than 7 hours,and the reproducibility is better than 1.3 mK;by assigning the eutectic point of Bi-In-Sn,the temperature is 333.7318 K and the expanded uncertainty is 3.0 mK(k=2).

关 键 词：计量学 次级固定点 铋铟锡三元合金 共晶点 温坪优化 90国际温标 

分 类 号：TB942[一般工业技术—计量学]