Surface trap effects on flashover voltages of epoxy/Al2O3 nanocomposites for high voltage insulation

Yu, Shihu; Wang, Shihang; Nazir, M. Tariq; Wang, Weiwang; Li, Shengtao; Phung, B.T.; Takada, Tatsuo

doi:10.1007/s10854-019-02166-3

Cited by 11 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is speculated to be caused by more impurities in samples with more nanoparticles, and electric resistivity may be significantly reduced if more nanoparticles are added. As to the breakdown strength, a very important parameter of insulating materials, it reached the maximum at a relatively low nanofiller content as reported [13,19,20]. Therefore, a wide range of physics properties of epoxy/TiO 2 nanocomposites including maximum service temperature should all be considered to determine the best loading content of nano-TiO 2 in the engineering application as high voltage insulating materials.…”

Section: Discussionmentioning

confidence: 99%

Effects of Functionalized Nano-TiO2 on the Molecular Motion in Epoxy Resin-Based Nanocomposites

Wang

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

Epoxy resin-based nanocomposites have been widely researched for being potential insulating materials in high voltage power equipment. In this paper, nano-TiO2 particles were chosen and surface-modified by a silane coupling agent containing an epoxy group. The effect of functionalized nano-TiO2 doping on the physical properties of epoxy resin was studied. The results of differential scanning calorimetry show that Tg increased significantly and can be increased by up to 35 °C. Therefore, it is believed that the suppression of molecular motion by the addition of nanofillers works effectively in the case of this functionalized nano-TiO2 and a strong interaction between the epoxy resin and the nano-TiO2 was formed after surface modification. Consequently, dynamic mechanical properties, thermal conductivity, electrical conductivity, and trap characteristics of epoxy resin are all adjusted after introducing functionalized nano-TiO2. All of these physical properties were analyzed from the perspective of suppression of molecular motion, and it is of significance to establish the theory of a nanocomposite dielectric. Besides, the results show that the epoxy/TiO2 nanocomposite is expected to be applied in the insulation system of electrical equipment.

show abstract

Section: Discussionmentioning

confidence: 99%

Effects of Functionalized Nano-TiO2 on the Molecular Motion in Epoxy Resin-Based Nanocomposites

Wang

et al. 2020

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…As shown in figure 8, we compare the increase of flashover voltage with the existing works on flashover voltage improvement in recent years. Studies [14,33,36,37] and [29,[38][39][40][41] refer to the doping of chemically modified and plasmamodified fillers, respectively. Research of [25,[42][43][44][45][46] chose direct surface modification by coating or plasma treatment.…”

Section: Surface Flashovermentioning

confidence: 99%

Enhanced surface insulation for SiO₂/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma

Cheng

Sun

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

To enhance the surface insulation properties of SiO2/epoxy resin composites, the SiO2 filler is co-modified with a chemical method and dielectric barrier discharge (DBD) plasma in this work. The effects on the micro-structures, electrical parameters and surface insulation properties of the materials are studied. The results show that chemical modification using the silane coupling agent (KH550) can effectively introduce organo-functional groups into SiO2 filler. On the other hand, plasma modification shows little effect on the organo-functional group but significantly increases the dispersity of the nanoparticles, therefore reducing filler conglobation in epoxy resin composite. The composite samples with SiO2 doping concentration of 1 wt.%, 2 wt.%, 3 wt.%, 5 wt.% and 7 wt.% are prepared and characterized. It is found that the synergy of chemical and plasma methods could significantly improve the surface insulation of composite samples. Through doping 2 wt.% of the co-modified SiO2 filler, the direct current flashover voltage of the composites in dry air at atmospheric pressure can be increased to 1.53 times of the pure epoxy. The enhanced surface insulation properties are explained by the trap effect and the change of electrical parameters through the co-modification process.

show abstract

“…The financial support for this work was provided by DST, Government of India (grant no EMR/20l6/005246) and FIST grant of DST, Government of India (grant no SR/FST/ETI-362/2014(C)). Gao et al [39] 0.70-0.85 Yu et al [40] 0.90-1.05 Neelmani et al [38] 0…”

Section: Acknowledgmentsmentioning

confidence: 99%

Investigations on the effect of ageing on charge de‐trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements

Maur

Haque

Pottekat

et al. 2020

IET Nanodielectrics

View full text Add to dashboard Cite

Surface trap effects on flashover voltages of epoxy/Al2O3 nanocomposites for high voltage insulation

Cited by 11 publications

References 26 publications

Effects of Functionalized Nano-TiO2 on the Molecular Motion in Epoxy Resin-Based Nanocomposites

Effects of Functionalized Nano-TiO2 on the Molecular Motion in Epoxy Resin-Based Nanocomposites

Enhanced surface insulation for SiO₂/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma

Investigations on the effect of ageing on charge de‐trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements

Contact Info

Product

Resources

About

Surface trap effects on flashover voltages of epoxy/Al2O3 nanocomposites for high voltage insulation

Cited by 11 publications

References 26 publications

Effects of Functionalized Nano-TiO2 on the Molecular Motion in Epoxy Resin-Based Nanocomposites

Effects of Functionalized Nano-TiO2 on the Molecular Motion in Epoxy Resin-Based Nanocomposites

Enhanced surface insulation for SiO2/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma

Investigations on the effect of ageing on charge de‐trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements

Contact Info

Product

Resources

About

Enhanced surface insulation for SiO₂/epoxy resin composites through co-modification of nanofiller with silane coupling agent and plasma