Compressive creep tests have been performed on mixed ionic-electronic conducting perovskite-type oxides SrTi1-xFexO3- (STF, x = 0.3, 0.5 and 0.7). Observed activation energies and stress exponents, at 800–1000 ◦C and in the stress range 10 100 MPa, indicate that the steady-state creep rate of STF under these conditions is predominantly limited by cation lattice diffusion (Nabarro-Herring creep). The effective stress exponents reflect a contribution of dislocation creep to the mechanism of creep in STF30 (x = 0.3). The observed creep rates are compared with those exhibited by related perovskite-type oxides, and are discussed in view of the possible application of STF as oxygen transport membrane (OTM).
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - 2015|
ten Donkelaar, S. F. P., Stournari, V., Malzbender, J., Nijmeijer, A., & Bouwmeester, H. J. M. (2015). High-temperature compressive creep behaviour of perovskite-type oxides SrTi1-xFexO3-δ. Journal of the European Ceramic Society, 35, 4203-4209. https://doi.org/10.1016/j.jeurceramsoc.2015.08.002