摘要详情

ID / 提交时间

231 / 2021-11-03 10:58:24

标题

Effect of Na+ on molecular relaxation of epoxy/alumina resin composites

关键字

composite insulation materials; dielectric properties; epoxy resin; impurity ions; Molecular chain

主题及专题

High voltage and insulation technology > Other topics in high voltage and insulation technology

状态

终稿

作者

Yafang Gao / Xi'An Jiaotong University

Mingru Li / Xi'an Jiaotong University

Shengtao Li / Xi'an Jiaotong University

Wang Kun / Global Energy Interconnection Research Institute

摘要

Abstract – Epoxy resin is an insulating material widely used in high-voltage electrical equipment, and Na⁺ is one of the main impurity ions in epoxy resin. In this research, we added different mass fraction Na⁺ into epoxy/alumina composites. After that, we measured the gel time, glass transition temperature and broadband dielectric spectrum. Besides, we used H-N function to fit the data of dielectric spectrum,used VFT function to calculate the activation energy of macromolecular chains. The gel time data showed that Na⁺ can promote the gelation of epoxy composite castables. The glass transition temperature proved that Na⁺ can promote crosslinking. The calculation results of dielectric fitting showed that Na⁺ can increase the activation energy of macromolecular chains and increases the intensity of ion ionization. This research reveal the effect of Na⁺ on molecular relaxation in epoxy composites and provide reference for the control of Na⁺ content in epoxy composites.

This work was supported by Science and Technology Project of SGCC Project Numbers (5500-201958322A-0-0-00)

Yafang Gao, State Key Laboratory of Electrical Insulation and Power Equipment, Xi`an Jiaotong University Xi`an, China. (Email: 979088042@qq.com)

Mingru Li, State Key Laboratory of Electrical Insulation and Power Equipment, Xi`an Jiaotong University Xi`an, China. (Email: 549675145@qq.com)

Shengtao Li*, State Key Laboratory of Electrical Insulation and Power Equipment, Xi`an Jiaotong University Xi`an, China. (Email:sli@mail.xjtu.edu.cn)

Kun Wang,State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co., Ltd Beijing, China wangkun278@163.com

重要日期

会议日期

07月11日

2023

至

08月18日

2023
11月10日 2021

初稿截稿日期
12月10日 2021

注册截止日期
12月11日 2021

报告提交截止日期

主办单位

IEEE IAS

承办单位

IEEE IAS Student Chapter of Southwest Jiaotong University (SWJTU)
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
IEEE PELS (Power Electronics Society) Student Chapter of HUST