Electric field enhancement of ceramics including microdefects

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2025-05-28 DOI:10.1111/jace.20690

Kaishi Matsunaga, Jin Araki, Yuki Nakashima, Manabu Fukushima, Kiyoshi Hirao, Norimitsu Murayama, Wataru Nakao

引用次数: 0

Abstract

In this study, a finite element analysis was performed to evaluate the effect of aspect ratios and dielectric constants of microdefects, such as pores, secondary phases, and grain boundary phases, on the electric field enhancement using the maximum field enhancement factor. For defect part with a lower dielectric constant than the solid part, including pores and secondary phases, as the aspect ratio of the defect part decreases (it becomes longer in the direction perpendicular to the electric field), the maximum electric field enhancement factor at the lateral surface of the defect part becomes higher. On the other hand, for defect part with a higher dielectric constant than the solid part, including grain boundary phases, the exact opposite behavior was observed. Moreover, it was also predicted that fine grain boundary phases act as a stronger electric field enhancement source than coarse pores.

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含微缺陷陶瓷的电场增强

本文利用最大电场增强因子，对微缺陷（如气孔、二次相和晶界相）的宽高比和介电常数对电场增强的影响进行了有限元分析。对于介电常数低于固体部分的缺陷部分，包括气孔和二次相，随着缺陷部分长径比的减小（在垂直于电场的方向上变长），缺陷部分侧表面的最大电场增强因子变大。另一方面，对于介电常数高于固体部分的缺陷部分，包括晶界相，则观察到完全相反的行为。此外，还预测细晶界相比粗孔具有更强的电场增强源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.