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-α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-α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.
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