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利用含有Ｃａ，Ｌａ和Ｆｅ成分的水溶胶（摩尔比为Ｃａ：Ｌａ：Ｆｅ＝０．２５：０．７５：ｌ），经浸渍──提拉──干燥──焙烧过程分别在玻璃衬底及Ａｌ＿２Ｏ＿３基片上制备了薄膜。通过ＸＲＤ和ＸＰＳ分析表明玻璃衬底上的薄膜是成分准确的钙钛矿结构的（Ｃａ＿０．２５Ｌａ＿０．７５）ＦｅＯ＿３薄膜，而Ａｌ＿２Ｏ＿３基片上的薄膜是成分不确切且呈混合相的薄膜；借助ＳＥＭ观察了薄膜的表面微结构；测试Ａｌ２０３基片上的薄膜对酒精的气敏效应，发现在较低的工作温度下，薄膜对低浓度的酒精蒸气有高的灵敏度。
Using a hydrosol (molar ratio of Ca: La: Fe = 0.25: 0.75: 1) containing Ca, La and Fe components, impregnation-pulling-drying- And Al 2 O 3 substrate prepared on the film. XRD and XPS analysis showed that the thin film on the glass substrate is a (Ca_0.25La_0.75) FeO_3 thin film with an accurate composition and the film on the Al_2O_3 substrate is an inaccurate and mixed phase thin film. With SEM The surface microstructure of the film was observed. The gas sensing effect of the film on the Al203 substrate was tested and found to be highly sensitive to low concentrations of alcohol vapors at lower operating temperatures.