Abstract: A series of Pb(Mg1/3Nb2/3)O3-Pb(Mn1/3Nb2/3)O3-PbZrO3-PbTiO3+0.3%CeO2 (in mass fraction)+xSr (PMN-PMnN-PZT-Ce-xSr, x=0.00,0.03,0.05,0.07) ceramics were prepared by a columbite precursor method, and phase structures, energy-storage properties and relaxation behaviors of the as-prepared PMN-PMnN-PZT ceramics varied in SrCO3 contents were stu-died. According to the results by X-ray diffraction, all samples are a single perovskite phase and possess a morphotropic phase boundary (MPB). The sample with x=0.07 obtained satisfactory energy storage performance, as its energy storage density and energy storage efficiency were 0.31 J/cm3 and 0.47, respectively under 60 kV/cm electric field. A modified Curie-Weiss law can describe the diffuse phase transition properly, and when Sr addition increases the dispersion coefficient of phase transformation γ increases. The sample with x=0.07, γ reaches a maximum value of 1.972 8, indicating that the dielectric relaxation behavior of ceramic is more evident.
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2017, Vol. 31 
