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Transport Properties of Composite Cathode Materials La 0 . 8 Sr 0 . 2 Fe 0 . 7 Ni 0 . 3 O 3 δ / Ce 0 . 9 Gd 0 . 1 O 1
| Content Provider | Semantic Scholar |
|---|---|
| Author | Δ. Ce. Gd. O. |
| Abstract | Full conductivity, diffusion and oxygen exchange properties in the composites (100 õ) La0.8Sr0.2Fe0.7Ni0.3O3 δ/xCe0.9Gd0.1O1.95 (LSFN/CGO, x is volume fraction, 0 < x < 71.1 %) were studied by means of the relaxation of electrical conduction at 700 °C for partial oxygen pressure within the range (0.23) ⋅ 10 atm. It was demonstrated that the electric conduction of the composites decreases monotonously with an increase in the concentration of CGO, while the coefficient of the chemical diffusion of oxygen (Dchem) increases. The constant of oxygen exchange (kchem) is higher for composites than for individual phases LSFN and CGO. The dependence of kchem value on the composition of the composite may be due to the effect of interphase boundaries on oxygen exchange processes. The total efficiency of oxygen transport in LSFN/CGO composites at a temperature of 700 °C is maximal for the composites with the volume fraction of CGO close to 70 %. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://sibran.ru/upload/iblock/800/800a418093c2da2091fa97199b71f623.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
