In this study, we investigated (1-x)Ba(Zr_0.2Ti_0.8)O₃–x(Ba_0.7Ca_0.3)TiO₃ lead-free piezoelectric ceramics for energy harvester applications. The (1-x)BZT-xBCT ceramic is a promising lead-free piezoelectric material in the field of piezoelectric energy harvesting. Piezoelectric and energy properties of (1-x)BZT-xBCT ceramics were analyzed to confirm the possibility of using them as energy-harvesting materials. Especially, the vicinity of the phase convergence region was investigated to improve their piezoelectric properties. In the phase convergence region, cubic, rhombohedral, orthorhombic, and tetragonal regions co-exist within the narrow region. Near the phase transition region between the orthorhombic and tetragonal phase, the highest piezoelectric property d₃₃ = 464 pC/N and the highest energy density of 158.5 μJ/cm³ were observed. This output energy density of 158.5 μJ/cm³ is the recorded highest value among lead-free ceramics. We found that the optimal sintering temperature was 1475 °C and the optimal composition was BZT-0.5BCT.

在这项研究中，我们研究了用于能量收集器的（1- x）Ba（Zr _0.2 Ti _0.8）O ₃ - x（Ba _0.7 Ca _0.3）TiO ₃无铅压电陶瓷。（1- x）BZT- x BCT陶瓷是压电能量收集领域中一种有前途的无铅压电材料。（1- x）BZT- x的压电和能量性质对BCT陶瓷进行了分析，以确认将其用作能量收集材料的可能性。特别地，研究了相会聚区域的附近以改善其压电性能。在相收敛区域中，在狭窄区域内共存立方，菱形，正交和四边形区域。在正交相和四方相之间的相变区域附近，观察到最高压电性能d ₃₃  = 464 pC / N和最高能量密度158.5μJ/ cm ³。158.5μJ/ cm ^3的输出能量密度是无铅陶瓷中记录的最高值。我们发现最佳烧结温度为1475°C，最佳组成为BZT-0.5BCT。