Mn_1.5Co_1.5O₄ protective coating on Crofer22APU produced by thermal co-evaporation for SOFCs

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• 作者：L.C. Ajitdoss^a ; F. Smeacetto^a ; ^{federico.smeacetto@polito.it} ; M. Bindi^b ; D. Beretta^b ; M Salvo^a ; M. Ferraris^a
• 关键词：Microstructure ; Solid oxide fuel cell ; Glass&ndash ; ceramic ; Sealant
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 March, 2013
• 年：2013
• 卷：95
• 期：Complete
• 页码：82-85
• 全文大小：591 K

文摘

A thin Mn_1.5Co_1.5O₄ spinel coating (1 ¦Ìm) was deposited on Crofer22APU using thermal co-evaporation technique. The electrical conductivity of the Mn_1.5Co_1.5O₄ coating was found to be 115 s/cm at 800 ¡ãC in air. Subsequently, a glass ceramic sealant was deposited by slurry on the Mn_1.5Co_1.5O₄ coating. Thermal cycling tests were performed on Crofer22APU/Mn_1.5Co_1.5O₄ and Crofer22APU/Mn_1.5Co_1.5O₄/glass-ceramic samples at 800 ¡ãC for 500 h in air. An excellent morphological and thermo-mechanical compatibility both of the glass ceramic sealant with Mn_1.5Co_1.5O₄ and of the Mn_1.5Co_1.5O₄ coating with the Crofer22APU was observed. EDS analysis revealed the presence of Cr in the Mn_1.5Co_1.5O₄ coating while no Cr diffusion into the glass ceramic sealant was observed after thermal cycling.