Synthesis and characterization of BaIn_(0.3-x)Y_xCe_(0.7)O_(3-δ)(x = 0, 0.1, 0.2, 0.3) proton conductors

摘要

The morphological and electrical properties of yttrium (Y) and indium (In) doped barium cerate perovskites of the form BaIn_(0.3-x)Y_xCe_(0.7)O_(3-δ) (with x = 0-0.3) prepared by a modified Pechini method were investigated as potential high temperature proton conductors with improved chemical stability and conductivity. The sinterability increased with the increase of In-doping, and the perovskite phase was found in the BaIn_(0.3-x)Y_xCe_(0.7)O_(3-δ) solid solutions over the range 0≤ x≤ 0.3. The conductivities decreased from x = 0.3 to 0 while the tolerance to wet CO_2 improved for BaIn_(0.3-x)Y_xCe_(0.7)O_(3-δ) samples with an increase of In-doping. BaIn_(0.1)Y_(0.2)Ce_(0.7)O_(3-δ) was found to have relatively high conductivity as well as acceptable wet CO_2 stability.