等离子喷涂燃料电池连接板LSM薄膜的性能研究  

Development on the performance of La0.8Sr0.2MnO3 films on the interconnect of SOFC by plasma spray

作　　者：王桂兰[1] 王文[1] 张海鸥[1] 钱晓良[1] 

机构地区：[1]华中科技大学材料学院,湖北武汉430074

出　　处：《功能材料》2003年第2期173-175,共3页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2001AA323090)

摘　　要：采用等离子喷涂法在SUS 430连接板基体上制备了LSM(La0.8 Sr0.2 MnO3)薄膜。用X射线衍射仪、扫描电镜和电子探针分别研究了喷涂前后LSM的相组成、薄膜的表面形貌和元素分布。用图像分析法计算了薄膜的孔隙率。二支点法测量了有与无LSM薄膜的SUS 430基体在130～800℃时的电导率。结果发现,薄膜与基体结合良好,薄膜孔隙细小,均匀分布,且非连通;LSM的相组成在喷涂前后保持一致;当温度<330℃时,有LSM保护膜的连接板的电导率小于无LSM薄膜的连接板的电导率;温度>330℃,结果相反。有LSM保护膜的连接板在空气中,130～800℃下,最大电导率为0.60Ω-1·cm-1。La0.8Sr0.2MnO3 was deposited on SUS 430 using air plasma spray (APS) in this paper. Phase of LSM, before and after spray, were measured with X-ray diffraction. Microstructure and elements distribution of the film were observed by Scan electron microscope and electron probe. Porosity of films was calculated by image analysis. Electrical conductivity of SUS 430, with and without LSM, was measured in the temperature interval 130CCCC to 800℃ by two probe. It is found that there is upstanding combination between substrate and film. Fine but not connective porosity was distributing equably in film. There was no change of phase during before and after spraying. Electrical conductivity of SUS with LSM was lower than those without LSM below 330℃ ,but the reverse results has been observed when the temperature was higher than 330'C. Maximal electrical conductivity of interconnect with LSM was 0.60Ω-1 ·cm-1 at 130℃ to 800℃.

关 键 词：固体氧化物燃料电池 连接板 等离子喷涂 LSM薄膜 图像分析 孔隙率 电导率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]