Dielectric and ferroelectric properties modification of 0.7Pb(Mg1/3Nb2/3)O3–0.3Pb(Zr0.52Ti0.48)O3 ceramics by Ba(Zn1/3Nb2/3)O3

• Synthesized ceramics with used two-step sintering process.
• The ceramics were modified microstructure and dielectric properties.
• Ferroelectric behavior showed the normal ferroelectric changed to relaxor.

(1 − x)[0.7Pb(Mg1/3Nb2/3)O3–0.3Pb(Zr0.52Ti0.48)O3]–xBa(Zn1/3Nb2/3)O3 of which x = 0, 0.025, 0.05, 0.075, and 0.1 ceramics were studied by a composite powder method and using a two-step sintering process. The morphology showed that the largest grain size was about 1.866 μm at x = 0.1, and the largest grain size of 3.81 μm at x = 0.05. The 0.7PMN–0.3PZT showed a decreased dielectric constant, posed dispersive phase transition and indicated relaxor ferroelectric when modified by BZN contents. The polarization from hysteresis loop measurements showed that saturated polarization, remnant polarization and coercive field decreased with increasing BZN. Increasing BZN not only exhibits electrostrictive behaviors with linear hysteresis loop shape but it is also a good candidate for lower power energy application. The largest strain of 0.122% was found at x = 0.025. These results clearly demonstrated the significance of the 0.7PMN–0.3PZT system activated by BZN.

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