纳米ZnO的制备及红外发射率研究  

Preparation and Infrared Emittance Study of Nanometer ZnO

作　　者：卢晓蓉[1] 徐国跃[1] 王岩[1] 王玲[1] 汤浩[1] 王幼文[2] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京210016 [2]浙江大学分析测试中心,杭州310027

出　　处：《南京航空航天大学学报》2003年第5期464-467,共4页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国防基础科研基金 ( J1 3 0 0 A0 0 2 )资助项目

摘　　要：以草酸、醋酸锌和无水乙醇为原料 ,采用溶胶 -凝胶方法合成了干凝胶前驱体 ,并以其热重 -差热分析 ( TG-DTA)为依据 ,在一定温度煅烧研磨获得纳米 Zn O粉体 ,经 X射线衍射 ( XRD)和透射电镜 ( TEM)分析表明实验终产物为纤锌矿结构的纳米 Zn O,平均粒径约 2 0 nm。XRD分析结果还表明纳米 Zn O中存在一定的晶格畸变现象。利用 IR-1红外发射率测量仪测量了纳米 Zn O粉体及其经不同温度热处理后样品在 8～ 1 4μm波段的平均发射率 ,初步探索了纳米材料作为隐身材料的应用前景。发射率测试结果表明纳米 Zn O的发射率比微米 Zn O的发射率大 ,并且随着热处理温度的增加 ,发射率单调下降并逐渐趋近于微米 Zn O。文中结合 XRD分析结果 。Gel precursors are synthesized from oxalic acid, znic acetate and ethanol by sol gel method. Nanometer ZnO powders are prepared by the decomposition of the precursors based on the thermal gravimetry (TG) and differential thermal analysis (DTA), and characterized with X ray diffraction (XRD) and transmission electron microscopy (TEM) measurements. XRD and TEM show that the powders are hexagonal ZnO and average particle size is about 20 nm. Results of XRD show that there exists distortion of crystal lattice in nanocrystalline ZnO. After heat treatment at different temperatures, infrared emittance in 8~14 μm waveband of the nanometer ZnO samples is measured by IR 1 infrared radiometer to search for their application prospect as infrared camouflage materials. The emittance results show that the infrared emittance of nanometer ZnO is higher than that of micron ZnO and tends to decrease to the latter with the heat temperature. Probable reasons are discussed.

关 键 词：制备 氧化锌 纳米材料 红外发射率 溶胶-凝胶法 晶格畸变 隐身材料 

分 类 号：O614.24[理学—无机化学] V218[理学—化学]