Abstract Barium zirconate titanate (Ba(ZrxTi1-x)O3) thick film ceramics were prepared using a tape-casting method. Their structures, morphologies, and electric properties were characterized using XRD, SEM and impedance analysis approaches, respectively. The electrocaloric effects (ECE), i.e., isothermal entropy changes and adiabatic temperature changes, were calculated using a Maxwell relation. It was confirmed by XRD and SEM that the obtained thick film ceramics are pure and dense perovskite structures. The dielectric analyses indicate that the Ba(ZrxTi1-x)O3 thick film ceramics show characteristics of transition from normal to relaxor ferroelectrics with the increasing Zr4+ ionic content. The polarization – electric field (P-E) hysteresis loops reveal larger polarizations and the ceramics can withstand an electric field as high as 12 MV/m. The adiabatic temperature changes ΔT calculated via the Maxwell relation and the polarization as a function of temperature, which is extracted from the P-E hysteresis loops measured at 12 MV m−1 are from 3.7 to 0.28 K with the increasing Zr4+ ionic content.

中文翻译：

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无铅Ba(Zr x Ti 1-x )O 3 厚膜陶瓷的大电热效应

摘要 采用流延法制备了锆钛酸钡(Ba(ZrxTi1-x)O3)厚膜陶瓷。分别使用 XRD、SEM 和阻抗分析方法对它们的结构、形貌和电性能进行了表征。使用麦克斯韦关系计算电热效应(ECE)，即等温熵变化和绝热温度变化。XRD和SEM证实得到的厚膜陶瓷为纯净致密的钙钛矿结构。介电分析表明，随着 Zr4+ 离子含量的增加，Ba(ZrxTi1-x)O3 厚膜陶瓷表现出从正常铁电体过渡到弛豫铁电体的特性。极化 - 电场 (PE) 磁滞回线显示出更大的极化，陶瓷可以承受高达 12 MV/m 的电场。