The effect of oxygen vacancies on the elastic properties of BaCe0.9Y0.1O3−δ was

studied by measuring the complex Young's modulus between 80 and 850K varying

the content of O vacancies from 0 to nearly 0.05. The Young's modulus measured

at a fixed temperature above 300K may change by more than 20% but this was due

to a shift of the rhombohedral-orthorhombic transition by 250K and to proton and

vacancy hopping. Below 100K, these effects were frozen and the filling of the O

vacancies with OH ions increases the Young's modulus by ~1.3%.

Effect of O Vacancies on the Young's Modulus of the BaCe1−xYxO3−δ Perovskite.

F.Cordero, F.Trequattrini, F.Deganello, V.La Parola, E.Roncari, A.Sanson:

Applied Physics Letters, 2009, 94[18], 181905