Cr_2O_3-MnO_2系高温红外陶瓷涂层的制备与研究  

Preparation and Mechanism of Cr_2O_3-MnO_2 System High Temperature Infrared Coatings Fabricated by Plasma Spray

作　　者：叶菲[1,2] 叶卫平[2] 程旭东[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,湖北武汉430070 [2]武汉理工大学材料学院,湖北武汉430070

出　　处：《红外技术》2010年第5期263-267,共5页Infrared Technology

摘　　要：以MnO2、Cr2O3、CuO、TiO2粉末为原料按比例混合,制备成团聚粉末,经等离子喷涂的方法制备红外辐射涂层。采用XRD、IR、XPS和IRE-2型红外发射率测试仪分析了涂层的结构、元素分布和其在600℃,400～4000 cm-1波段范围内的红外辐射性能。发射率最高达0.90。结果表明,涂层尖晶石结构四面体间隙和八面体间隙中离子分布和价态对涂层红外发射率具有影响,随着MnO2的添加体系红外发射率呈现先增加后减少的变化。The spherical agglomerated particles was synthesized by spray drying from the MnO2, Cr2O3, CuO, TiO2 powders mixed at different ratios and then sprayed to a copper sheet to fabricate the infrared ceramics coatings. The microstructure, cation distribution in the tetrahedral and octahedral sites of the spinel and the emissivity performance at 600℃ within wavenumber 400-4000 cm^-1 of the coatings are studied by X-ray diffraction（XRD）, Fourier Transform Infrared（FT-IR）, XPS and the IRE-2 infrared radiant instrument respectively. The high temperature emissivity can reach 0.90. The results reveal that the exchanges and substitutions of cations on both tetrahedral and octahedral sites have an important influence on the infrared emissivity, which firstly increases continually and then decreases with the percentage of MnO2 varying in the composition.

关 键 词：过渡金属氧化物 尖晶石 等离子喷涂 法向全发射率 离子分布 

分 类 号：TQ174.75[化学工程—陶瓷工业]