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Title: Structural and electrical properties of Ce{sub 0.75}(Gd{sub 0.95−x}Sr{sub x}Ca{sub 0.05}){sub 0.25}O{sub 2−δ} thick film electrolyte

Graphical abstract: - Highlights: • Effects of Sr doping on electrical properties and structure were investigated. • The samples have higher conductivity and low activation energy. • Cause of increase oxygen vacancy concentration in the grain boundary. - Abstract: The effects of Sr doping on the electrical properties of Ce{sub 0.75}(Gd{sub 0.95−x}Sr{sub x}Ca{sub 0.05}){sub 0.25}O{sub 2−δ} (x = 0, 0.01, 0.02, 0.03, 0.04, 0.05 mol%) electrolytes thick films were investigated. The samples sintered at 1400 °C for 8 h. X-ray diffraction (XRD) showed typical XRD patterns of a cubic fluorite structure, and the ionic conductivity was examined by AC impedance spectroscopy. From the experimental results, it was observed that Ce{sub 0.75}(Gd{sub 0.95−x}Sr{sub x}Ca{sub 0.05}){sub 0.25}O{sub 2−δ} (x = 0.04 mol%) electrolytes thick film have higher conductivity and minimum activation energy at 600 °C. This is explained in terms of the increased in the oxygen vacancy concentration at the grain boundary.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [1]
  1. Department of Electronics Materials Engineering, Kwangwoon University, Seoul (Korea, Republic of)
  2. Department of Ceramic Engineering, Gyeongsang National University, Jinju (Korea, Republic of)
  3. R and D Center, Samwha Capacitor, Yongin-si (Korea, Republic of)
Publication Date:
OSTI Identifier:
22290352
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 12; Conference: ISFM 2012: 5. international symposium on functional materials, Perth, WA (Australia), 17-20 Dec 2012; Other Information: Copyright (c) 2013 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; CONCENTRATION RATIO; ELECTROLYTES; FILMS; FLUORITE; GRAIN BOUNDARIES; IONIC CONDUCTIVITY; OXYGEN; X-RAY DIFFRACTION