Optimization of the Temperature-Dependent Electrical Resistivity in Epoxy/Positive Temperature Coefficient Ceramic Nanocomposites

被引：15

作者：

Teng, Chenyuan ^{[1
,2
]}

Zhou, Yuanxiang ^{[1
,2
,3
]}

Wu, Chao ^{[4
]}

Zhang, Ling ^{[1
]}

Zhang, Yunxiao ^{[1
]}

Zhou, Wenjun ^{[2
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst & Generat Equipment, Beijing, Peoples R China

[2] Wuhan Univ, Sch Elect Engn & Automat, Wuhan, Hubei, Peoples R China

[3] Xinjiang Univ, Wind Solar Storage Div, State Key Lab Power Syst & Generat Equipment, Sch Elect Engn, Urumqi, Xinjiang, Peoples R China

[4] Univ Connecticut, Inst Mat Sci, Elect Insulat Res Ctr, Storrs, CT USA

来源：

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION | 2021年 / 28卷 / 02期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

epoxy resin; positive temperature coefficient nanoparticles; resistivity-temperature characteristics; electric field distribution; trap characteristic;

D O I：

10.1109/TDEI.2020.009214

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nano-size positive temperature coefficient (PTC) ceramic particles and epoxy composites doped with 0, 0.5, 1, 5, 10 and 20 phr of PTC nanoparticles are prepared to suppress the decrease of electrical resistivity with temperature. Electrical resistivity under 30, 50, 70, 90, and 110 degrees C, DC breakdown strength, and trap characteristic are measured. DC electric field distribution under radical temperature gradient is simulated using a simplified bushing model insulated with prepared materials. The mechanism for the regulating of electrical resistivity-temperature characteristic of epoxy composites is discussed. The electrical resistivity at 110 degrees C, DC breakdown strength at 110 degrees C, and electric field distortion of the epoxy composite with 1 phr PTC nanoparticles is 454, 131 and 74%, respectively of the neat epoxy resin, which exhibits potential to be used as insulating materials in high voltage DC electrical systems.

引用

页码：468 / 475

页数：8

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