Effect of titania concentration on the grain boundary conductivity of Ce0. 8Gd0. 2O1. 9 electrolyte
L Ge, R Li, S He, H Chen, L Guo - international journal of hydrogen energy, 2012 - Elsevier
L Ge, R Li, S He, H Chen, L Guo
international journal of hydrogen energy, 2012•ElsevierThe effect of titania (TiO2) addition on the densification, crystal structure and electrical
property of Ce0. 8Gd0. 2O1. 9 (GDC) are examined. TiO2 addition reduces GDC sintering
temperature by∼ 200° C and considerably improves grain boundary conduction. The
minimum grain boundary resistivity is obtained at 0.8 mol% TiO2 concentration. XRD
analysis suggests that the solubility limit of TiO2 in GDC is∼ 0.6 mol%. The optimum doping
level (0.8 mol%) is slightly higher than the solubility limit (0.6 mol%), which implies that a …
property of Ce0. 8Gd0. 2O1. 9 (GDC) are examined. TiO2 addition reduces GDC sintering
temperature by∼ 200° C and considerably improves grain boundary conduction. The
minimum grain boundary resistivity is obtained at 0.8 mol% TiO2 concentration. XRD
analysis suggests that the solubility limit of TiO2 in GDC is∼ 0.6 mol%. The optimum doping
level (0.8 mol%) is slightly higher than the solubility limit (0.6 mol%), which implies that a …
The effect of titania (TiO2) addition on the densification, crystal structure and electrical property of Ce0.8Gd0.2O1.9 (GDC) are examined. TiO2 addition reduces GDC sintering temperature by ∼200 °C and considerably improves grain boundary conduction. The minimum grain boundary resistivity is obtained at 0.8 mol% TiO2 concentration. XRD analysis suggests that the solubility limit of TiO2 in GDC is ∼0.6 mol%. The optimum doping level (0.8 mol%) is slightly higher than the solubility limit (0.6 mol%), which implies that a small amounts of TiO2 (∼0.2 mol%) at the grain boundaries benefits the grain–boundary conduction.
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