Effects of Ni diffusion on the accelerated conductivity degradation of scandia-stabilized zirconia films under a reducing atmosphere. Issue 7 (June 2016)

• Record Type: Journal Article
• Authors: Yun, Kyong Sik; Kwon, Young-il; Kim, Jung-Hwa; Jo, Sangyoung; Yoo, Chung-Yul; Yu, Ji Haeng; Joo, Jong Hoon
• Is Part Of: Journal of the European Ceramic Society. Volume 36:Issue 7(2016:)
• Page Start: 1835
• Page End: 1839
• Publication Date: 2016-06
• Subjects: Solid oxide fuel cell -- Scandia-stabilized zirconia -- Ni diffusion -- Conductivity degradation -- Raman spectroscopy; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2016.02.007
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Due to the importance of Ni diffusion into the electrolyte of a solid oxide fuel cell (SOFC) during the co-sintering process, we have studied the effects of Ni diffusion on the conductivity degradation and phase change of ceria-doped scandia-stabilized zirconia (ScSZ) films. To fabricate Ni-diffused ScSZ films, ScSZ tapes have been sintered by placing porous NiO plates on both sides of the tape at 1450 °C for 10 h. The time-dependent aging behavior of the Ni-diffused ScSZ film (thickness ∼27 μm) under reducing conditions has been investigated. The dissolution of Ni into the ScSZ considerably accelerates the conductivity degradation. This degradation behavior could be correlated to the phase transition promoted by Ni precipitation in the reducing atmosphere.