Simulation of Impedance Spectra for a Full Three‐Dimensional Ceramic Microstructure Using a Finite Element Model
Simulation of Impedance Spectra for a Full Three‐Dimensional Ceramic Microstructure Using a Finite Element Model
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DOI：
10.1111/jace.12750
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发表时间：
2014-03
影响因子：
3.9
通讯作者：
J. Dean;J. Harding;D. Sinclair
中科院分区：
文献类型：
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作者：
J. Dean;J. Harding;D. Sinclair
提出了一种表征随机形状颗粒的完整三维集合的电异质电陶瓷的方法。有限元建模，在空间和时间上求解麦克斯韦方程组，用于模拟阻抗谱 (IS) 数据。该技术克服了与先前用于模拟 IS 数据的方法相关的几个缺陷，并允许对陶瓷微观结构的完整三维颗粒表示进行综合处理，而不需要基于 Brickwork 层模型 (BLM) 的等效电路或引入恒定相位元素来描述 IS 响应的任何非理想性。这适用于具有不同晶粒尺寸和电性能的全三维陶瓷微观结构，以生成突出 BLM 在数据分析中的局限性的 IS 图。
A method of characterizing electrically heterogeneous electroceramics for a full three-dimensional collection of randomly shaped grains is presented. Finite element modeling, solving Maxwell's equations in space and time is used to simulate impedance spectroscopy (IS) data. This technique overcomes several deficiencies associated with previous methods used to simulate IS data and allows comprehensive treatment of a full three-dimensional granular representation of ceramic microstructure without the requirement for equivalent circuits based on the Brickwork layer model (BLM) or the introduction of constant phase elements to describe any nonideality of the IS response. This is applied to a full three-dimensional ceramic microstructure with varying grain size and electrical properties to generate IS plots that highlight limitations of the BLM in data analysis.