Publications

Combined x-ray/neutron Rietveld refinement of Ln-doped PZT perovskites

Rodriguez, Marko A.; Rodriguez, Marko A.; Boyle, Timothy J.; Tuttle, Bruce T.

Combined XRD/neutron Rietveld refinements were performed on PbZr{sub 0.30}Ti{sub 0.70}O{sub 3} powder samples doped with nominally 4% Ln (where Ln = Ce, Nd, Tb, Y, or Yb). Resulting refined structural parameters indicated that the lattice parameters and volume changes in the tetragonal perovskite unit cell were consistent with A and/or B-site doping of the structure. Ce doping is inconsistent with respect to its rather large atomic radius, but is understood in terms of its oxidation to the Ce{sup +4} oxidation state in the structure. Results of the B-site displacement values for the Ti/Zr site indicate that amphoteric doping of Ln cations in the structure results in superior properties for PLnZT materials.