Enhanced thermal conductivity and dielectric properties of Al/β-SiCw/PVDF composites

被引：129

作者：

Zhou, Wenying ^{[1
,2
]}

Chen, Qingguo ^{[2
]}

Sui, Xuezhen ^{[1
]}

Dong, Lina ^{[1
]}

Wang, Zijun ^{[1
]}

机构：

[1] Xian Univ Sci & Technol, Coll Chem & Chem Engn, Xian 710054, Peoples R China

[2] Harbin Univ Sci & Technol, Minist Educ, Key Lab Engn Dielectr & Its Applicat, Harbin 150080, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2015年 / 71卷

基金：

美国国家科学基金会;

关键词：

Polymer-matrix composites (PMCs); Thermal properties; Electrical properties; Functional composites; ELECTRICAL-PROPERTIES; FABRICATION; CONSTANT; FILM;

D O I：

10.1016/j.compositesa.2015.01.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polymeric composites with high thermal conductivity, high dielectric permittivity but low dissipation factor have wide important applications in electronic and electrical industry. In this study, three phases composites consisting of poly(vinylidene fluoride) (PVDF), Al nanoparticles and beta-silicon carbide whiskers (beta-SiCw) were prepared. The thermal conductivity, morphological and dielectric properties of the composites were investigated. The results indicate that the addition of 12 vol% beta-SiCw not only improves the thermal conductivity of Al/PVDF from 1.57 to 2.1 W/m K, but also remarkably increases the dielectric constant from 46 to 330 at 100 Hz, whereas the dielectric loss of the composites still remain at relatively low levels similar to that of Al/PVDF at a wider frequency range from 10(-1) Hz to 10(7) Hz. With further increasing the beta-SiCw loading to 20 vol%, the thermal conductivity and dielectric constant of the composites continue to increase, whereas both the dielectric loss and conductivity also rise rapidly. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：184 / 191

页数：8

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