(Ba_1−xSr_x)(Mn_yTi_1−y)O₃ (BSMT) ceramics with x = 35, 40 mol% and y = 0, 0.1, 0.2, 0.3, 0.4, 0.5 mol% were prepared using a conventional solid-state reaction approach. The dielectric and ferroelectric properties were characterized using impedance analysis and polarization-electric field (P–E) hysteresis loop measurements, respectively. The adiabatic temperature drop was directly measured using a thermocouple when the applied electric field was removed. The results indicate that high permittivity and low dielectric losses were obtained by doping 0.1–0.4 mol% of manganese ions in (BaSr)TiO₃ (BST) specimens. A maximum electrocaloric effect (ECE) of 2.75 K in temperature change with electrocaloric strength of 0.55 K·(MV/m)⁻¹ was directly obtained at ∼21 °C and 50 kV/cm in Ba_0.6Sr_0.4Mn_0.001Ti_0.999O₃ sample, offering a promising ECE material for practical refrigeration devices working at room temperature.

使用x射线制备（Ba _{1- x} Sr _x）（Mn _y Ti _{1- y}）O ₃（BSMT）的x = 35、40 mol％和y = 0、0.1、0.2、0.3、0.4、0.5 mol％的陶瓷。常规的固态反应方法。使用阻抗分析和极化电场（P – E）磁滞回线测量。当去除施加的电场时，使用热电偶直接测量绝热温度降。结果表明，通过在（BaSr）TiO ₃（BST）样品中掺杂0.1–0.4 mol％的锰离子，可以获得高介电常数和低介电损耗。在0.55的K电热强度·（MV / m）的温度变化2.75 k的最大电热效应（ECE）^{- 1}直接在Ba中~21℃和50千伏/厘米得到_0.6锶_0.4的Mn _0.001钛_0.999 ö _3个样本，为在室温下工作的实用制冷设备提供了一种有希望的ECE材料。