不同晶体结构对铁酸铜发射率影响的研究  

Study on different crystal structure impact on infrared emissivity of CuFe_2O_4

作　　者：熊熙然[1] 张玲玲[1] 苍大强[1] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,冶金与生态工程学院

出　　处：《冶金能源》2013年第1期15-19,25,共6页Energy For Metallurgical Industry

基　　金："十二五"国家科技支撑重大项目资助(项目号No.2011BAE12B01-02);粤港关键领域重点突破项目(项目编号2010Z52102);广东省重大科技专项(项目编号2010A080804005)

摘　　要：用高温固相烧结法制备了具有立方晶体结构和四方晶体结构的铁酸铜(CuFe2O4)。在不同温度下对其进行了法向发射率测定,测定温度范围:290～873K,测定光谱范围:3～5,8～14和1～22μm。运用扫描电镜(SEM)、X-射线衍射测试实验对产物的形貌以及晶体结构进行了表征和分析。实验结果表明所测样品中在各个测量温度下,具有立方晶体结构的铁酸铜在三个光谱范围内法向发射率最高。随着温度的升高:(1)自由载流子跃迁、晶格振动增强,红外辐射增强;(2)声子散射增强,红外辐射减弱。The work was devoted to investigate the normal spectrum infrared emissivity performance of copper ferrite （ CuFe204 ） with different crystal structure under different temperature conditions. Cop- per ferrite CuFe204 with cubic （c） and tetragonal （t） phase were synthesized by high temperature solid reaction. Three spectrum （3 -5, 8 -14 and 1 -22μm） infrared emissivity of the samples were measured from 290K to 873K. The emissivity of precursors （CuO, Fe203 and CuO - Fe2O3 mixture） and sintered products were obtained by Radiometer IR -II, Scanning electron microscopy （SEM） and X - ray diffraction （XRD） were used to investigate the structure morphology and crystal structure. The results show that CuFe2O4 （c） has highest infrared emissivity in three spectrums throughout the test temperature range. The influence of temperature gradient on emissivity and its mechanisms are discussed.

关 键 词：发射率 涂料 铜铁尖晶石 红外发射光谱 晶体结构 

分 类 号：O614.121[理学—无机化学]