This work highlights the electrocaloric (EC) and energy storage (ES) properties of 1-x(0.6Ba(Zr_0.2Ti_0.8)O₃-0.4(Ba_0.7Ca_0.3)TiO₃)-x(BiTa_0.5La_0.5)O₃ (1-xBZCT-xBTL) ceramics with x = 0 to 0.05. The XRD studies revealed that inclusion of BTL content in BZCT does not induce any impurity phase. The peak splitting of BZCT near 2θ = 45\(^\circ\) and 66\(^\circ\) confirms the presence of morphotropic phase boundary corresponding to tetragonal and rhombohedral phases. Further, the solid solution formation of BZCT-BTL has suppressed its morphotropic phase boundary behaviour. The XRD, Raman and temperature dependent dielectric studies suggest the presence of pseudocubic phase in 1-xBZCT-xBTL at higher values of x = 0.025 and 0.05. Moreover, the inclusion of BTL boosts the diffused phase transition behaviour of BZCT ceramics. Further, BTL strengthened its relaxor nature due to a reduction in grain size as evidenced from SEM analysis. It is observed that the 0.99BZCT-0.01BTL ceramics show 95% efficiency and a maximum recoverable energy density of 479 mJ/cm³ at 100 kV/cm. Moreover, the electrocaloric temperature change and responsivity are found to be 1.06 K and 0.01 Kcm/kV near the transition temperature.

_{这项工作重点介绍了 1-x(0.6Ba(Zr 0.2} Ti _0.8 )O ₃ -0.4(Ba _0.7 Ca _0.3 )TiO ₃ )-x(BiTa _0.5 La _0.5 )O的电热 (EC) 和储能 (ES) 特性₃ (1-xBZCT-xBTL) 陶瓷，x = 0 至 0.05。XRD 研究表明，BZCT 中包含 BTL 含量不会产生任何杂质相。BZCT 在 2θ = 45 \(^\circ\)和 66 \(^\circ\)附近的峰值分裂证实了对应于四方相和菱面体相的同形相界的存在。此外，BZCT-BTL 的固溶体形成抑制了其同形相界行为。XRD、拉曼和温度相关介电研究表明，在 x = 0.025 和 0.05 的较高值时，1-xBZCT-xBTL 中存在赝立方相。此外，BTL 的加入增强了 BZCT 陶瓷的扩散相变行为。此外，SEM 分析证明，由于晶粒尺寸减小，BTL 增强了其弛豫性质。观察到0.99BZCT-0.01BTL陶瓷表现出95%的效率和在100 kV/cm下的最大可恢复能量密度479 mJ/cm ³。此外，在转变温度附近，电热温度变化和响应度分别为1.06 K和0.01 Kcm/kV。