Mn_1.95Co_0.21Ni_0.84O₄‒core@LaMnO₃‒shell microbeads were in‒situ processed by an ink‒jet printing method. The composition of the LaMnO₃ on the electrical properties compared with the only core Mn_1.95Co_0.21Ni_0.84O₄ (MCN) ceramic were studied. X‒ray diffraction analysis showed that the ceramics were composed mainly of cubic spinel NiMn₂O₄ with rhombohedral perovskite LaMnO₃ phase. The X-ray photoelectron spectroscopy (XPS) results explained the ion migration occurred in the composite materials. These ceramics had negative temperature coefficients and B_25/50 and E_a values of 1456–5972 K and 0.0814–0.5148 eV, respectively. Moreover, the aging coefficients (△R/R) of the bilayer core@shell structure ceramics were <0.51%, which is much lower than that of uncoated Mn_1.95Co_0.21Ni_0.84O₄ microbeads (4.1%). The grain boundaries were verified to dominate important role in the electrical property of the Mn_1.95Co_0.21Ni_0.84O₄–core@LaMnO₃‒shell ceramics.

Mn _1.95 Co _0.21 Ni _0.84 O ₄ ‒core@LaMnO ₃ ‒壳微珠通过喷墨印刷方法原位处理。研究了与单芯Mn _1.95 Co _0.21 Ni _0.84 O ₄ (MCN)陶瓷相比，LaMnO _{3的组成对电性能的影响。}X-射线衍射分析表明陶瓷主要由立方尖晶石 NiMn ₂ O ₄和菱面体钙钛矿 LaMnO _3组成阶段。X射线光电子能谱（XPS）结果解释了复合材料中发生的离子迁移。这些陶瓷具有负温度系数，B _25/50和E_值分别为 1456-5972 K 和 0.0814-0.5148 eV。此外，双层核@壳结构陶瓷的老化系数（△ R / R）<0.51%，远低于未包覆的Mn _1.95 Co _0.21 Ni _0.84 O ₄微珠（4.1%）。经证实，晶界在 Mn _1.95 Co _0.21 Ni _{0.84的电性能中起着重要作用}O ₄ –core@LaMnO ₃ –壳陶瓷。