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Title: Electrical and structural properties of Ce{sub 0.8}(Sm{sub 0.5−x}Y{sub 0.5}Al{sub x}){sub 0.2}O{sub 2−δ} ceramics as an electrolyte for SOFC

Highlights: • Effect of Al doping on electrical and structural properties was investigated. • According to the contents of Al, the samples show each electrical property. • When Al is 0.4, the sample shows highest electrical properties. - Abstract: The effects of various contents of alumina co-doping on a ceria-based electrolyte were investigated. All samples were sintered at 1500 °C for 10 h. The X-ray diffraction (XRD) patterns showed a fluorite cubic structure. To investigate the surfaces of the Ce{sub 0.8}(Sm{sub 0.5−x}Y{sub 0.5}Al{sub x}){sub 0.2}O{sub 2−δ} (CSYA) ceramics by scanning electron microscopy (SEM), the electrical properties of the CSYA ceramics were measured by AC impedance. The optimal values of ionic conductivity and activation energy were reached at x = 0.4 measured at 600 °C. This result indicated that the alumina co-doping improved the electrical and microstructural properties of the ceria-based electrolyte.
Authors:
; ;  [1] ;  [2] ;  [1]
  1. Department of Electronic Materials Engineering, Kwangwoon University, Seoul (Korea, Republic of)
  2. Department of Ceramic Engineering, Gyeongsang National University, Jinju (Korea, Republic of)
Publication Date:
OSTI Identifier:
22420592
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 58; Conference: IFFM2013: International forum on functional materials, Jeju City (Korea, Republic of), 27-29 Jun 2013; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ACTIVATION ENERGY; ALUMINIUM OXIDES; CERAMICS; CERIUM OXIDES; CONCENTRATION RATIO; ELECTROLYTES; FLUORITE; IMPEDANCE; IONIC CONDUCTIVITY; MICROSTRUCTURE; SAMARIUM COMPOUNDS; SCANNING ELECTRON MICROSCOPY; SOLID OXIDE FUEL CELLS; SURFACES; X-RAY DIFFRACTION; YTTRIUM COMPOUNDS