The behavior of 33PbYb$_{1/2}$Nb$_{1/2}$O$_{3}$–22PbZrO$_{3}$–45PbTiO$_{3}$ ceramic solid solutions in an electric field

The temperature dependences of the dielectric parameters were studied, as well as the changes in the dielectric constant with time in ceramic 33PbYb$_{1/2}$Nb$_{1/2}$O$_{3}$–22PbZrO$_{3}$–45PbTiO$_{3}$ samples in electric fields (0 $<E<$ 8 kV/cm). It is shown that in the phase existing below the temperature of the morphotropic phase transition, in addition to the rhombohedral and tetragonal phases, a small fraction of the relaxor pseudocubic phase is present. It was found that, unlike other relaxors, the dielectric constant practically does not change with time when an electric field is applied in the phase below the temperature of the morphotropic phase transition. Possible reasons for this behavior are discussed.