Ionic Conductivity of Rare Earth Doped Phase Stabilized Bi_2O_3: Effect of Ionic Radius

摘要

Nanostructured Bi_2O_3 was prepared through citrate auto ignition method and stabilized down to room temperature into rhombohedral phase by 30% doping of rare earth cations (Eu~(3+), Sm~(3+),Nd~(3+), La~(3+)), which was experimentally confirmed by the XRD patterns of the doped compositions. The average crystallite size increases with increase of ionic radius. The ionic conductivity of the La-doped compound was found to be highest among other doped compounds. The change in structural and electrical properties were discussed and correlated with the ionic radius of the dopants.