Enhanced dielectric permittivity of BaTiO₃/epoxy resin composites by particle alignment

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• 作者：Dong Seok Kim ; Changyeon Baek ; Ho Jin Ma ; Do Kyung Kim ; ^{dkkim@kaist.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Ceramic/polymer composite ; Dielectric ; Ice-templating ; Barium titanate ; Permittivity
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：42
• 期：6
• 页码：7141-7147
• 全文大小：4706 K

文摘

Barium titanate (BaTiO₃)/epoxy resin composites with a novel structure, in which the BaTiO₃ particles were directionally aligned in the epoxy resin matrix, were fabricated using the ice-templating method. The effects of the filler particle alignment and the filler fraction on the dielectric permittivity as well as the dielectric loss of the composites were studied. The results show that the aligning filler particles can significantly improve the dielectric permittivity while maintaining the dielectric loss compared with the traditional composite structure (homogeneously distributed). Due to the feasibility of the enhancement of the dielectric properties of the composites, the particle alignment that is achieved via the ice-templating method can be used in the field of high energy density capacitors.