Effect of poling process on piezoelectric properties of BCZT – 0.08 wt.% CeO2 lead-free ceramics

Electromechanical properties of Ce-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics

“…In order to surmount this problem, a number of additives have been considered, among which CuO [21] and Bi 2 O 3 [22] were used to densify and lower the sintering temperature of BCZT ceramics. In addition, CeO 2 has been considered for lowering the sintering temperature and improving the small signal piezoelectric coefficients of BCZT [23][24][25], but no comprehensive studies of large signal piezoelectric properties, which are crucial for actuator applications, were reported. Since Ce can exhibit different valence states, either 3+ or 4+, it can enter both A-and B-sites of the perovskite BCZT structure.…”

“…It should be mentioned that in the above study, CeO 2 was added to BCZT as a sintering additive, without any compensation at A-or B-sites, and the highest small signal d 33 of 600 pC/N was obtained for BCZT sample with 0.04 wt% CeO 2 . Chandrakala et al [25] also studied the effects of CeO 2 on dielectric and piezoelectric properties of sol-gel synthesized BCZT. They used the same method of addition and the same amount as Cui et al [23], but the samples were sintered at a higher sintering temperature (1550 ℃).…”

A critical review: the impact of electrical poling on the longitudinal piezoelectric strain coefficient

“…The experimental results showed that d 33 and k p increased with the poling field, temperature, and poling period, where the optimized values for pure KNN are 40 kV cm −1 , 140 °C, and 20–25 min, respectively. Chandrakala et al 84 studied the optimized the poling parameters of the synthesized lead-free CeO 2 -doped barium calcium zirconate titanate (BCZT–0.08 wt% CeO 2 ) system to obtain an improved piezoelectric outcome. Under these tuned conditions (50 °C, 3 E c , and 30 min), respective maximum d 33 and k p values nearly equal to 670 pC N −1 and 60% were achieved.…”

Anisotropic Piezoelectric Properties of Porous (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 Ceramics with Oriented Pores through TBA-Based Freeze-Casting Method

“…BCZT ceramics are a lead-free piezoelectric material that has attracted much attention for its high piezoelectric coefficient, which surpasses that of the currently common PZT-based piezoelectric ceramics [ 12 ]. To date, the methods of texture [ 13 , 14 ] and doping [ 15 ] were adopted for regulating the piezoelectric coefficient and relative permittivity of dense BCZT ceramic materials. Zhang et al [ 16 ] constructed the pore structure of BCZT piezoelectric ceramics in an oriented manner using water-based freeze casting, preparing a lamellar structure with ceramic connections at the edges of the lamellae.…”