Effect of Zn substitution on dielectric responses of 0.2PMT·0.8PMN ceramics

Phase developments and lattice parameters of a perovskite structure as well as dielectric responses in a Pb[(Mg1/3Ta2/3)0.2(Mg1/3Nb2/3)0.8]O3 system with Zn substitution for Mg are reported. Perovskite developments were investigated by X-ray diffractometry, from which phase yields and lattice parameters with compositional change were determined. Weak-field dielectric constant values of the entire system ceramics were measured under low-frequency conditions. Phase transition modes reflected in the dielectric constant spectra were further analyzed closely to explore diffuseness characteristics.