红外高发射率ZnO:Al粉末的制备  

Preparation and Characterization of Infrared High-Emissivity ZnO:Al Powders

作　　者：姚银华[1] 曹全喜[1] 

机构地区：[1]西安电子科技大学技术物理学院,西安710071

出　　处：《真空科学与技术学报》2013年第2期192-196,共5页Chinese Journal of Vacuum Science and Technology

摘　　要：基于红外高发射率材料的应用,用固相法制备了Zn1-xAlxO(x=0.01,0.02,0.05,0.07)粉末,并研究预煅烧和二次煅烧后样品的红外发射率。X射线衍射和扫描电镜分析结果表明,当Al掺杂浓度达到2%(原子比)时,出现了尖晶石相ZnAl2O4。预煅烧和二次煅烧后的样品结晶质量差,有尖晶石相ZnAl2O4形成。红外发射率分析表明,1200℃时,随着掺杂浓度的增大,样品在3～5μm,8～14μm,1～22μm三个波段内的发射率都降低了。随着煅烧温度的升高,在8～14μm波段内,Zn0.99Al0.01O发射率先升高后降低,在0.984～0.987之间。Zn0.99Al0.01O经过预煅烧和二次煅烧后,在这三个波段内的发射率都升高了。二次煅烧温度为1200℃时,得到的8～14μm内的发射率最高,为0.989。二次煅烧温度为1300℃的样品在三个波段内的整体发射率大于0.95。The infrared high-emissivity N-doped ZnO powder materials were prepared by solid-phase reactions. The impacts of the preparation conditions,including the calcinations temperature and time, and A1 content, on infrared emis- sion characteristics were evaluated. The N-doped ZnO powders were characterized with X-ray diffraction and electron microscopy. The results show that Al content and calcination temperature significantly affect the microstructures and IR emission. For instance, at 2 % （at.） of A1, spinel-phased ZnAl2O4 was observed in the basically amorphous, pre-clacinated and re-calcinated powders. As the A1 contents of the powder, calcinated at 1200℃, increased, its emissivity decreased in the 3 - 5μm, 8 - 14μm, and 1 - 22 p.m ranges. However, as the calcinations temperature rose up, the emissivity of Zno.99 Al0.010 in the range of 8 - 14μm varied in an increase-decrease mode, ranging from 0.984 to 0.987. After the preand re- calcination at 1200℃, its emissivity in the three bands increased, with the highest emissivity of 0.989 in the range of 8 - 14 lan. At a re-calcination temperature of 1300℃, the overaLl emissivity in the three bands was found to be 0.95.

关 键 词：固相法 ZAO粉末 红外发射率 二次煅烧 

分 类 号：TM201.4[一般工业技术—材料科学与工程] TM283[电气工程—电工理论与新技术]