0.5wt%ZnO添加BaCe0.8Zr0.1Y0.1O3-a涂层提高避雷设施性能的研究

采用溶胶-凝胶法,在铁基底上制备了0.5%(质量分数)ZnO添加的BaCe0.8Zr0.1Y0.1O3-a涂层薄膜。根据原粉的热失重(TGA)和差热(DTA)曲线控制烧结温度和保温时间。采用X射线衍射(XRD)、扫描电镜(SEM)和TEM对其晶体结构、表面和断面形貌进行了表征。XRD分析得到制备的膜层BaCe0.8Zr0.1Y0.1O3-a相为主,SEM表征结果显示,膜层表面涂层均匀、结构致密,没有大的裂纹孔洞等缺陷;膜层与基底断面的SEM显示界面处两者匹配较好。ZnO增强涂层连接性的微观原因由TEM结果表征。分别在干燥和湿润空气条件下测量膜层材料电导率,结果得到湿润空气中膜层材料电导率高,而且温度越高时电导率越大。这种膜层适合作为避雷线的保护层,并能起到提高避雷线性能的作用。

Study on 0.5wt%ZnO addition BaCe0.8Zr0.1Y0.1O3-a film enhancement lightning-strike protection equipment

0.5wt%ZnO addition BaCe0.8Zr0.1Y0.1O3-a film was prepared on the Fe substrate via sol-gel route.The sintering temperature and sintering time characters were according the TGA and DTA of the materials.Phase composition and fracture morphology of the material were characterized by using XRD,SEM and TEM.The XRD results indicate that the ceramic is of a single orthorhombic phase of perovskite type BaCe0.8Zr0.1Y0.1O3-a.The SEM shows that the surface of the film is uniformity,high density and not cranny.The interface of the film and substrate are well combinative from analyzing the section image.The microstructure reason of ZnO enhancement the connection of crystalline grain was shown by TEM.The conductivity of the material is measured in the dry and wet air,respectively.The conductivity is increased as the temperature rises and bigger in wet air.This method prepared BaCe0.8Zr0.1Y0.1O3-a film can be used to protect the lines lightning Protection and enhancement their properties.