Synthesis, characterization, and properties of lead-based relaxor ferroelectrics

Lead-based relaxor ferroelectrics such as Pb(Mg_1/3Nb_2/3)O₃ (PMN), Pb(Zn_1/3Nb_2/3)O₃ (PZN), and their solid solutions with BaTiO₃ and PbTiO₃ have been prepared by a solution combustion process which involves metal nitrates/oxalate and tetraformal trisazine (TFTA) at 350 °C. Thermal evolution of perovskite relaxors has been investigated at different temperatures of calcination using the powder x-ray diffraction method. Particles are fine and sinter-active at low temperature (1050 °C). Both particulate and dielectric properties are compared.