The conductivity and ionic transport of doped bismuth titanate pyrochlore Bi1.6МxTi2O7 − δ (М - Mg, Sc, Cu)

The high temperature (T > 300 °C) relaxation process was observed in Bi1.6MxTi2O7 − δ at the range of frequency 103-106 Hz. Oxygen mobility and surface reactivity of Bi1.6M0.2Ti2O7 − δ (M - Sc, Mg and Cu) and Bi1.4Mg0.2Ti2O7 − δ samples were studied by using temperature programmed isotope exchange (TPIE) with C18O2 in flow and closed reactors. According to TPIE data the regular lattice oxygen is homogeneous from the point of view of its mobility.