| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1297792 | Solid State Ionics | 2009 | 9 Pages |
Abstract
The oxygen flux through La1.9Sr0.1NiO4 + δ has been measured as a function of oxygen activity gradient and temperature (750-1000 °C). The oxygen nonstoichiometry was determined by thermogravimetry in the temperature range of 400-1000 °C and oxygen partial pressures of 0.0002-1 atm. The total conductivity was measured over a similar range of conditions. The oxide ion partial conductivity derived from the oxygen flux data is approximately 4 orders of magnitude lower than the total, mainly p-type electronic conductivity. The defect structure was derived based on the data. Combining the oxygen flux and oxygen nonstoichiometry, the self diffusion coefficient of oxygen interstitials was evaluated.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Zuoan Li, Reidar Haugsrud, Jens B. Smith, Truls Norby,