The effect of MnCO₃ additions on crystal structure, grain growth behavior, and dielectric properties were studied in the La₂O₃-doped BaTiO₃ system. La₂O₃-doped BaTiO₃ powders were prepared by conventional solid-state reaction routes and then after the addition of MnCO₃, the powder compacts were sintered at 1250 ℃ in air. The tetragonality (c/a) of the samples increased with the amount of up to 0.5 mol% MnCO₃ and then decreased above 0.5 mol%. The 3D grain shape became more spherical polygons with increasing amounts of MnCO₃. The grain growth behavior changed from suppressed growth to abnormal grain growth and finally normal grain growth with increasing amounts of MnCO₃ when the powder compacts were sintered. The correlation between the grain growth behavior and the grain shape change is discussed from the perspective of two-dimensional nucleation grain growth theory. Further, the dielectric properties are discussed in terms of the crystal structure, microstructural control, and charge compensation.

_{在La 2} O ₃掺杂的BaTiO ₃体系中研究了添加MnCO ₃对晶体结构、晶粒生长行为和介电性能的影响。采用常规固相反应路线制备La ₂ O ₃掺杂的BaTiO _{3粉末，加入MnCO 3}后，在空气中1250 ℃烧结。样品的四方性(c/a)随着MnCO ₃的添加量增加而增加至0.5 mol% ，然后在超过0.5 mol%时下降。_{随着 MnCO 3}含量的增加，3D 晶粒形状变得更加球形多边形. 当粉末压块烧结时，随着MnCO ₃量的增加，晶粒生长行为从抑制生长转变为异常晶粒生长，最后是正常晶粒生长。从二维形核晶粒长大理论的角度讨论了晶粒长大行为与晶粒形状变化的相关性。此外，介电特性在晶体结构、微观结构控制和电荷补偿方面进行了讨论。