| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1298536 | Solid State Ionics | 2005 | 9 Pages |
Abstract
Materials formulated Ln2 − x − yyCaxNiO4 + δ (with (i) x = y = 0 for Ln = La, Pr, Nd, (ii) x ≠ 0 when y = 0 or y ≠ 0 when x = 0 for Ln = Nd) have been prepared and characterized using various techniques with respect to their mixed ionic/electronic conducting properties. These oxides exhibit high electronic conductivity (≈ 100 S cm− 1 at T = 700 °C) as well as high values of oxygen diffusion and surface exchange coefficients (D* and k, determined using SIMS analysis of the 18O isotope). The oxygen diffusion performances of Pr2NiO4 + δ are the highest ones among those of the studied compounds. Interestingly, in the Nd-series they are slightly improved by the creation of Nd vacancies, while they are affected by the substitution of Nd by Ca.
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Authors
E. Boehm, J.-M. Bassat, P. Dordor, F. Mauvy, J.-C. Grenier, Ph. Stevens,