High temperature proton transport in BaCe0.95Yb0.05O3−δ perovskite

The phase transitions and proton transport in BaCe0.95Yb0.05O3−δ perovskite were studied by Raman spectroscopy, X-ray diffraction and synchrotron radiation X-ray diffraction. Proton mobility in this material appears to be intimately associated to the crystal phases of the framework host. Therefore, in the present paper the phase transformations of the BaCe0.95Yb0.05O3−δ perovskite were studied during heating and under hydrogen diffusion. One of the objectives of the present research was to establish the expanse across the phase fields. But, more significantly, the effect of hydrogen diffusion on structure applying a careful structural refining analysis was studied with the help of the Pawley and Rietveld methods.