Glass transition temperatures and Charge Transport Characteristics of Epoxy/SiO2 Composites

2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE) Pub Date : 2020-09-06 DOI:10.1109/ICHVE49031.2020.9280052

Xiangnan Hu, Z. Xing, Shihang Wang, Jiucheng Wang, Jiao Xiang, Chuang Zhang, Jianying Li, Jian Gao

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引用次数: 1

Abstract

Epoxy resin based composite insulation materials are widely used in power equipment, and they have also received extensive research. But the effects of the fillers on physical properties of epoxy resin has not yet formed a consistent law, and the mechanism has not been finalized. So, it is necessary to continue to study the characteristics of epoxy resin composites. In this paper, the epoxy/SiO2 composites were studied. By comparing the effects of different nano-SiO2 contents and the effects of the same content of micro-SiO2 and nano-SiO2, the results showed that the glass transition temperature, electrical conductivity and thermal stimulation current all exhibited novel trends. After the introduction of nano-silica, the glass transition temperature decreased, which indicated that the molecular chain was easier to move, and consequently the charge carriers were easier to migrate, leading a higher electrical conductivity. On the contrary, the effects of micro-SiO2 were not obvious.

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环氧/SiO2复合材料的玻璃化转变温度和电荷输运特性

环氧树脂基复合绝缘材料广泛应用于电力设备中，也得到了广泛的研究。但填料对环氧树脂物理性能的影响尚未形成一致的规律，其作用机理也尚未确定。因此，有必要继续研究环氧树脂复合材料的特性。本文对环氧/SiO2复合材料进行了研究。通过对比不同纳米sio2含量和相同微sio2和纳米sio2含量的影响，结果表明，玻璃化转变温度、电导率和热刺激电流均呈现出新的变化趋势。引入纳米二氧化硅后，玻璃化转变温度降低，表明分子链更容易移动，从而使载流子更容易迁移，导致电导率更高。相反，微sio2的影响不明显。

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2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)

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