Piezoelectric and ferroelectric properties in Ba(Zr,Ti)O3 and CuO-Ba(Zr,Ti)O3 ceramics

• Optimized sintering process can improve the piezoelectric and structural properties.
• Clear SEM images proved that sintering temperature effects on the grain size.
• CuO dopants can improve the crystalline properties of Ba(Zr0.04Ti0.96)O3 ceramics.

In this paper, we have investigated the piezoelectric and ferroelectric properties of Ba(Zr0.04Ti0.96)O3 and CuO-Ba(Zr0.04Ti0.96)O3 ceramics prepared by the conventional solid solution method. Ba(Zr0.04Ti0.94)O3 ceramics were sintered at 1400, 1450, and 1500 °C to optimize the sintering temperature of pure BZT. BZT ceramics with 1 mol% of CuO added were sintered at 1300, 1350, 1400, 1450, and 1500 °C. It was found that the optimal sintering temperature was decreased by 50 °C, while the piezoelectric properties were enhanced, compared to those of pure BZT ceramics. The ceramics showed excellent piezoelectric properties with d33 302 pC/N and ferroelectric properties with dielectric constant 2135. The piezoelectric CuO-BZT ceramics were investigated according to the change of sintering temperature by considering the microstructure and the piezoelectric and ferroelectric properties compared with those of pure BZT.

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