Greatly enhanced permittivity in BaTiO3-epoxy dielectric composites with improved connectivity of ceramic phase

被引：18

作者：

Cao, Meng ^{[1
]}

Li, Lei ^{[1
]}

Hong, Wen Bin ^{[1
]}

Wu, Shu Ya ^{[1
]}

Chen, Xiang Ming ^{[1
]}

机构：

[1] Zhejiang Univ, Sch Mat Sci & Engn, Lab Dielect Mat, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF MATERIOMICS | 2021年 / 7卷 / 01期

关键词：

Ceramic-polymer composite; Connectivity; High permittivity; CONSTANT; FILMS;

D O I：

10.1016/j.jmat.2020.07.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

BaTiO3-epoxy dielectric composites were prepared by curing the liquid epoxy monomer that infiltrated into the partially-sintered BaTiO3 porous ceramics. The BaTiO3 volume fraction of the composites maintained around 58.6% with increasing the sintering temperature from 600 degrees C to 1000 degrees C, while the significant microstructure evolution, improved connectivity of BaTiO3 phase and dramatical increase in permittivity from 102 to 697 were observed. The permittivity and BaTiO3 volume fraction further increased to 2328 and 83.5% for the sintering temperature of 1250 degrees C. The present composites had the permittivity 1-2 orders of magnitude higher than the 0-3 type ones, and the extraordinary results were mainly attributed to the improved connectivity of BaTiO3 phase that benefited from partial sintering. The connectivity also had a significant effect on the temperature dependence of permittivity, and good combination of temperature-stable high permittivity, low dielectric loss and relatively low ceramic fraction could be obtained by regulating the connectivity of BaTiO3 ceramic phase. (C) 2020 The Chinese Ceramic Society. Production and hosting by Elsevier B.V.

引用

页码：1 / 7

页数：7

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