温度变化下环氧树脂/SrTiO3纳米复合材料直流击穿性能和介电特性的研究

IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Muhammad Zeeshan Khan, Faisal Alsaif, Farooq Aslam
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引用次数: 0

摘要

由于现代工业的进步,典型的高压环氧树脂(Ep)绝缘已不能满足高温高压的要求。为了克服这一问题,合成了Ep树脂/钛酸锶(SrTiO3)纳米复合材料来减轻绝缘缺陷。采用硅烷偶联剂KH550对纳米srtio3进行了改性。用FTIR分析了纳米srtio3修饰后分子链的变化。Tg证实,在适当的填充水平下,Ep树脂/(SrTiO3)纳米复合材料减少了颗粒间距离,增加了纳米复合材料内部不可移动Ep区域的数量,从而提高了玻璃化转变温度。纳米srtio3的掺入对复合材料的介电常数和介电损耗都有明显的影响。随着改性纳米srtio3的加入,材料的直流击穿强度得到了提高,从而在基体内部形成了更深的陷阱。此外,温度的升高导致电子雪崩的产生,这减少了电荷抑制,从而降低了直流击穿强度。在Ep树脂中加入改性纳米srtio3后,其直流电导率降低。此外,在Ep树脂中加入改性的纳米srtio3提高了局部放电起始电压,从而防止了放电在达到闪络之前分散。此外,温度降低会显著影响局部放电起始电压(PDIV),降低电荷的动能,延长沿表面的脱陷过程,从而增加PDIV。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Study on the DC breakdown performance and dielectric characteristics of epoxy resin/SrTiO3 nanocomposites by varying temperature

Study on the DC breakdown performance and dielectric characteristics of epoxy resin/SrTiO3 nanocomposites by varying temperature

Due to advancements in modern industry, typical high-voltage epoxy (Ep) insulation is inadequate for high temperatures and elevated voltages. To overcome this issue, Ep resin/strontium titanate (SrTiO3) nanocomposites were synthesized to mitigate insulating flaws. Nano-SrTiO3 was modified using the silane coupling agent KH550. The alterations in the molecular chain following the addition of modified nano-SrTiO3 were assessed using FTIR. Tg confirms that Ep resin/(SrTiO3) nanocomposites, at an appropriate filling level, reduces inter-particle distances and increase the amount of immobile Ep areas inside the nanocomposite, hence elevating the glass transition temperature. The incorporation of nano-SrTiO3 has an obvious effect on both the dielectric constant and dielectric loss of composites. The DC breakdown strength improved with the addition of modified nano-SrTiO3, which created deeper traps inside the bulk matrix. Furthermore, the rise in temperature leads to the creation of an electron avalanche, which diminishes charge suppression and hence reduces DC breakdown strength. The DC conductivity decreased after the addition of modified nano-SrTiO3 into Ep resin. Moreover, the addition of modified nano-SrTiO3 into Ep resin elevates the partial discharge initiation voltage, hence preventing discharge dispersion prior to reaching flashover. Additionally, reduced temperature significantly impacts the partial discharge inception voltage (PDIV) by lowering the kinetic energy of the charge, prolonging the de-trapping process along the surface and consequently increasing PDIV.

Graphical abstract

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来源期刊
Colloid and Polymer Science
Colloid and Polymer Science 化学-高分子科学
CiteScore
4.60
自引率
4.20%
发文量
111
审稿时长
2.2 months
期刊介绍: Colloid and Polymer Science - a leading international journal of longstanding tradition - is devoted to colloid and polymer science and its interdisciplinary interactions. As such, it responds to a demand which has lost none of its actuality as revealed in the trends of contemporary materials science.
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