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- W3037222052 abstract "Abstract In this study, effect of Ca-doping on electrical and electrochemical properties of garnet structure Y3-xCaxFe5O12-δ (x = 0, 0.05, 0.1, 0.3, 0.5 and 0.7) was investigated. Cubic-phase (Ia-3d) garnet was prepared through sol-gel method and final sintered at 1100 °C for 2 h in air. Highest oxygen non-stoichiometry (δ = 0.19) was found in x = 0.3 member. X-ray absorption spectroscopy (XAS) confirmed the formation of hole carriers ( F e F e . ) due to Ca-substitution for Y in Y3Fe5O12.4-Probe DC measurements showed electrical conductivity increased with an increase in Ca amount until x = 0.1 (1.58 S/cm at 750 °C) and then decreased due to decrease in the concentration of the charge carriers. Lowest area specific resistance (ASR) of 1 Ωcm2 was seen at 750 °C in air for the symmetrical cell with x = 0.3 garnet-LSGM composite electrode. Studies on pO2 dependent ASR and impedance spectroscopy genetic programming (ISGP) analysis revealed oxygen dissociation and partial reduction of adsorbed oxygen molecule co-limit the electrochemical performance of oxygen reduction reaction (ORR) of this electrode." @default.
- W3037222052 created "2020-07-02" @default.
- W3037222052 creator A5013374889 @default.
- W3037222052 creator A5033120840 @default.
- W3037222052 creator A5041492055 @default.
- W3037222052 creator A5058837022 @default.
- W3037222052 creator A5058937460 @default.
- W3037222052 creator A5080349810 @default.
- W3037222052 date "2020-10-01" @default.
- W3037222052 modified "2023-09-24" @default.
- W3037222052 title "Studies on effect of Ca-doping on structure and electrochemical properties of garnet-type Y3-xCaxFe5O12-δ" @default.
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