La_(3)Ni_(2)O_(7)基红外辐射涂料的红外辐射特性研究  

Study on Infrared Radiation Properties of La_(3)Ni_(2)O_(7)-Based Infrared Radiative Coatings

作　　者：刘冠一 苏家庆 张剑 苍大强 白皓[1] LIU Guanyi;SU Jiaqing;ZHANG Jian;CANG Daqiang;BAI Hao(School of Metallurgy and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Institute of Steel Industry,Development Research Institute,Shougang Group Corporation,Beijing 100041,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]首钢集团有限公司发展研究院钢铁产业研究所,北京100041

出　　处：《工业炉》2022年第5期1-6,共6页Industrial Furnace

基　　金：国家重点研发计划项目(2019YFC1905701)。

摘　　要：通过烧结法和熔盐法制备了La_(3)Ni_(2)O_(7)粉体,确定了其结构并分析晶粒的生长方式,测定了涂层中主要元素的分布情况。结果表明:两种方法制备的La_(3)Ni_(2)O_(7)粉体的性能无太大差别,不同样品在1~22μm、3~5μm和8~14μm波段的红外发射率均在0.950以上。以熔盐法制备的La_(3)Ni_(2)O_(7)粉体为基料制备了高发射率红外涂料,涂层在3~5μm波段的发射率在0.965以上,经过1100℃加热处理后的涂层发射率总体比未处理涂层高,表明此涂层红外发射率优良且性能稳定。涂层经过1100℃热震试验循环20次之后,样品的表面未出现脱落和开裂现象,表明此涂层具有良好的抗热震性能。La_(3)Ni_(2)O_(7)powders were prepared by sintering and molten salt methods,their structures were determined and the grain growth patterns were analyzed,and the distribution of the main elements in the coatings was determined.The results showed that the properties of the La_(3)Ni_(2)O_(7)powders prepared by the two methods did not differ much,and the infrared emissivity of the different samples in the bands of 1-22μm,3-5μm and 8-14μm were above 0.950.The La_(3)Ni_(2)O_(7)powder prepared by molten salt method was used as the base material for the preparation of high emissivity infrared coatings,and the emissivity of the coating in the3-5μm band was above 0.965.The emissivity of the coating after heating treatment at 1100℃was generally higher than that of the untreated coating,indicating that this coating had excellent infrared emissivity and stable performance.After 20 cycles of thermal shock test at 1100℃,the surface of the sample did not show peeling and cracking,which indicated that the coating had good thermal shock resistance.

关 键 词：烧结法 熔盐法 La_(3)Ni_(2)O_(7) 发射率 抗热震性 

分 类 号：TQ637[化学工程—精细化工]