Thermal Conductivity and Insulating Property of Epoxy Composites with Micro-BN and Nano-Al<sub>2</sub>O<sub>3</sub>

YAO Tong; BIAN Wancong; YANG Ying

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Thermal Conductivity and Insulating Property of Epoxy Composites with Micro-BN and Nano-Al₂O₃

更新时间：2025-12-08

- Thermal Conductivity and Insulating Property of Epoxy Composites with Micro-BN and Nano-Al₂O₃
- Vol. 47, Issue 1, Pages: 251-259(2021)
- 作者机构：
  
  清华大学电机工程与应用电子技术系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 January 2021，
  
  Published：2021
- 稿件说明：
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YAO Tong, BIAN Wancong, YANG Ying. Thermal Conductivity and Insulating Property of Epoxy Composites with Micro-BN and Nano-Al₂O₃[J]. 2021, 47(1): 251-259.
DOI：

YAO Tong, BIAN Wancong, YANG Ying. Thermal Conductivity and Insulating Property of Epoxy Composites with Micro-BN and Nano-Al₂O₃[J]. 2021, 47(1): 251-259. DOI：

摘要

环氧树脂（epoxy resin

EP）以其粘附力强、绝缘性能好等优点

在电气领域中得到广泛应用。但环氧树脂的低热导率限制其在器件中的使用

尤其在高频条件下。文中通过多巴胺改性微米氮化硼和纳米氧化铝

将制备的微纳米二元填料填充环氧树脂

研究环氧树脂复合材料的导热性能和电气绝缘性能。结果表明

质量分数22.5%BN和7.5%Al

环氧树脂复合材料的导热系数可以达到1.35 W/（m·K）

相比于纯EP增加了812.5%

而介电损耗维持在较低水平。高频击穿实验结果展示出复合材料击穿时间明显提高

比纯环氧树脂提高了387%。该种方法制备所得的环氧树脂复合材料

具有热导率高、介电损耗低、高频击穿强度大等优点

为开发适用于高频电力电子器件的导热绝缘材料提供参考。

Abstract

Epoxy resin is widely used in the electrical industries because of its strong adhesion and excellent insulating properties. However

the low thermal conductivity of epoxy resin limits its application

especially in a high-frequency condition. In this paper

the thermal conductivity and electrical insulating property of the epoxy resin composite were studied by filling the epoxy resin with the micro-nano binary filler prepared by dopamine modified micro-BN and nano-Al

. The results showed that the thermal conductivity of 22.5 wt% BN and 7.5 wt% Al

composite could reach 1.35 W/（m·K）

which was 812.5% higher than that of neat EP

while the dielectric loss was kept at a low level. The results of high frequency breakdown experiments showed t

hat the breakdown time of the composite was significantly increased

which was 38.7% higher than that of neat EP. The composite prepared by this method has the advantages of high thermal conductivity

low dielectric loss

high frequency breakdown strength

providing a reference for the development of thermally conductive but electrically insulating materials for high frequency power electronic equipment.

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LI Jinzhong

QIN Yifan

LIU Xuandong

ZHANG Qiaogen

WEN Hao

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Related Institution

China Electric Power Research Institute

State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University

Wuhan Branch, China Electric Power Research Institute

School of Electrical Engineering and Automation, Wuhan University

Department of Electrical Engineering, Xi’an University of Technology

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Thermal Conductivity and Insulating Property of Epoxy Composites with Micro-BN and Nano-Al2O3

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Thermal Conductivity and Insulating Property of Epoxy Composites with Micro-BN and Nano-Al₂O₃