Multilayer energy-storage ceramic capacitors (MLESCCs) are studied by multiscale simulation methods. Electric field distribution of a selected area in a MLESCC is simulated at a macroscopic scale to analyze the effect of margin length on the breakdown strength of MLESCC using a finite element method. Phase field model is introduced to analyze the dielectric breakdown mechanism of MLESCC at a mesoscopic scale. The microstructure of selected area is generated through voronoi tessellation random construction routine containing core-shell-structured dielectric materials. The effects of margin length, shell permittivity, and shell volume fraction on the breakdown strength of MLESCC are respectively studied. Results indicate that the breakdown strength of MLESCC can be enhanced by adopting larger margin lengths, or by increasing the shell permittivity or volume fraction.

中文翻译：

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高压多层储能陶瓷电容器的多尺度设计

通过多尺度仿真方法研究了多层储能陶瓷电容器（MLESCC）。在宏观尺度上模拟MLESCC中选定区域的电场分布，以使用有限元方法分析边界长度对MLESCC击穿强度的影响。引入相场模型，以介观尺度分析了MLESCC的介电击穿机理。选定区域的微观结构是通过包含核-壳结构介电材料的伏洛诺瓦镶嵌随机构造程序生成的。分别研究了边长，壳介电常数和壳体积分数对MLESCC击穿强度的影响。结果表明，采用更大的边距长度可以提高MLESCC的击穿强度，