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首页> 外文期刊>Journal of materials science >Dielectric and space charge characteristics of nano-modified liquid silicone rubber for high-voltage DC cable accessories
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Dielectric and space charge characteristics of nano-modified liquid silicone rubber for high-voltage DC cable accessories

机译：高压直流电缆配件纳米改性液体硅橡胶介质和空间电荷特性

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摘要

In order to solve the problem of space charge accumulation in high-voltage DC cable accessories, nanometer titanium dioxide (TiO_2) doping method is used to improve the space charge performance of liquid silicone rubber (LSR). Conductivity, dielectric spectrum and DC breakdown field strength, space charge distribution, and the trap level distribution of nano-TiO_2/ LSR composite samples were tested in this paper. With the increase of the doping concentration of nanoparticles, the DC conductivity increased, and the DC breakdown field strength decreased. The ε_r of the TiO_2/LSR composite sample increased with the increase in the doping concentration of nano-TiO_2. As the frequency increased, tan5 decreased first in the low-frequency region and then increased in the high frequency. When the electric field strength increases from 10 to 20 kV/mm, the same polarity charges appear near the upper and lower electrodes of the sample, and the space charge accumulation doubled. After the addition of nano-TiO_2, under the two electric field strengths, the space charge accumulation of 4 wt%-TiO_2 LSR composite materials decreased by 24.55 nc and 81.03 nc, respectively. The trap energy level of the 4 wt% nano-Tid composites becomes smaller, and shallow traps are introduced, it was verified that the addition of 4 wt% nano-TiOn particles reduced the space charge inside the composite sample and achieved the effect of suppressing space charge.
机译：为了解决高压DC电缆附件中的空间电荷累积问题，使用纳米二氧化钛（TiO_2）掺杂方法来改善液体硅橡胶（LSR）的空间电荷性能。在本文中测试了电导率，介电光谱和直流击穿场强，空间电荷分布和纳米TiO_2 / LSR复合材料样品的捕集水平分布。随着纳米颗粒的掺杂浓度的增加，DC电导率增加，直流击穿场强度降低。 TiO_2 / LSR复合样品的ε_R随着纳米TiO_2的掺杂浓度的增加而增加。随着频率的增加，TAN5在低频区域中首先减小，然后在高频中增加。当电场强度从10到20kV / mm增加时，相同的极性电荷在样品的上部和下电极附近出现，并且空间电荷累积加倍。在添加纳米TiO_2之后，在两个电场强度下，4wt％-ti_2 LSR复合材料的空间电荷累积分别降低了24.55nc和81.03nc。 4wt％纳米TID复合材料的捕集能级变小，引入浅陷阱，验证了4wt％纳温颗粒的加入减少了复合样品内的空间电荷，并达到了抑制的效果空间充电。

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  • 来源
    《Journal of materials science》 |2020年第19期|16819-16829|共11页
  • 作者

    Qingguo Chen; Banggen Xi; Jinfeng Zhang; Xinyu Wang; Hongda Yang;

  • 作者单位

    Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education. Harbin University of Science and Technology Harbin 150080 Heilongjiang China;

    Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education. Harbin University of Science and Technology Harbin 150080 Heilongjiang China;

    School of Electrical Engineering and Automation Qilu University of Technology (Shandong Academy of Sciences). Jinan 250353 China;

    Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education. Harbin University of Science and Technology Harbin 150080 Heilongjiang China;

    Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education. Harbin University of Science and Technology Harbin 150080 Heilongjiang China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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