Study of space charge characteristics in epoxy resin and its nanocomposites

Das, Supriyo; Gupta, Nandini

doi:10.1109/icsd.2010.5568066

Cited by 9 publications

(5 citation statements)

References 11 publications

(12 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To improve the properties of dielectrics, many scholars have modified dielectrics materials with corresponding nanoscale or microscale fillers. Epoxy resin has been modified with nanoscale or microscale particles in order to improve the space charge, partial discharge resistance, breakdown strength, and resistivity [4,5,6]. Katayama et al use nano-SiO 2 and micron-SiO 2 to improve the discharge resistance and inhibits pace charge interactions [7].…”

Section: Introductionmentioning

confidence: 99%

Dielectric Properties of Epoxy Resin Impregnated Nano-SiO2 Modified Insulating Paper

et al. 2019

View full text Add to dashboard Cite

Epoxy resin-impregnated insulation paper (RIP) composites are used as the inner insulation of dry condenser bushing in the ultra-high voltage direct current (UHVDC) power transmission system. To improve the dielectric properties of RIP, nano-SiO2 is added to the insulation paper at concentrations of 0–4wt % before impregnation with pure epoxy resin. X-ray diffraction (XRD), scanning electron microscopy observations as well as the typical dielectric properties of relative permittivity, DC volume conductivity, DC breakdown strength, and thermally stimulated depolarization current (TSDC), were obtained. The effects of trap parameters on the breakdown field strength and volume conductivity were investigated. The DC breakdown electric field strength of the sample increased as the trap level increased. The maximum DC breakdown strength of nano-SiO2-modified RIP was increased by 10.6% the nano-SiO2 content of 2 wt %. The relative permittivity and DC volume conductivity were first decreased and then increased with increasing nano-SiO2 content. These changes occurred near the interfaces between nano-SiO2 and RIP. The increased DC breakdown strength was mainly attributed to the increased trap level.

show abstract

Section: Introductionmentioning

confidence: 99%

Dielectric Properties of Epoxy Resin Impregnated Nano-SiO2 Modified Insulating Paper

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Deep traps are likely to be formed in the second layer of the multi-core model. This may mean the increase in space charge because the deeper traps will trap carriers only after all shallow trap levels have been filled up [19]. Tanaka elaborated this approach in a further paper, where he remarked that treeing is affected by such deep traps.…”

Section: The Role Of Nanoparticle Interfacesmentioning

confidence: 99%

A Review of Two Nanocomposite Insulating Materials Models: Lewis’ Contribution in the Development of the Models, their Differences, their Similarities and Future Challenges

Danikas

Bairaktari

Sarathi

et al. 2014

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

Nanocomposite polymers are nowadays a major field of research. This paper investigates the interpretational possibilities of two models developed, namely, Tsagaropoulos’ model and Tanaka’s model. Particular emphasis is given to Lewis’ model, which was the first one to be proposed and whose contribution to the aforementioned models was significant. The two models were developed separately and independently from each other. They both consider various layers around the nanoparticles. They both consider well bonded and more loosen layers. Similarities and differences between the two models are pointed out and discussed as well as possibilities for further research in order to shed light on some aspects of electrical phenomena in these materials. Particular emphasis is given to the interfaces between the nanoparticles and the surrounding base material. Comments are offered regarding the challenges facing the two models w.r.t. the interpretation of discharges on nanocomposite surfaces. Possible new areas of research are suggested and new challenges for the aforementioned models are pointed out.

show abstract

“…The additives include magnesium oxide [5], silica [6], alumina [7], titania [8], boehmite [9], glass fiber [10] and so on. But there is rarely research about epoxy-creped paper composites.…”

Section: Introductionmentioning

confidence: 99%

Space charge characteristics of epoxy-creped paper composites

Ning

Xiang

Liu

et al. 2013

2013 IEEE International Conference on Solid Dielectrics (ICSD)

View full text Add to dashboard Cite

In order to study the interfacial effect on space charge distribution in HVDC bushings which impregnated with epoxy resin, samples just like epoxy-impregnated paper-epoxy were prepared by vacuum casting process. Space charge characteristics have been studied by the method of pulsed electroacoustic (PEA) technique at different electric fields and temperatures, including charge polarity, charge amount, the threshold for space charge accumulation. It was found that the polarity of the interfacial charge was related to electric field and temperature. When at 20kV/mm, 313K, there was heterocharge at the interface between epoxy and impregnated paper. But when temperature went up to 353K, homocharge accumulated at both interfaces. However, when at 10kV/mm, there was heterocharge whether the temperature was 313K or 353K. At the same time, threshold for charge accumulation reduced when temperature went up. Above phenomenons were thought to be the result of dielectric polarization and charge injection.

show abstract

Study of space charge characteristics in epoxy resin and its nanocomposites

Cited by 9 publications

References 11 publications

Dielectric Properties of Epoxy Resin Impregnated Nano-SiO2 Modified Insulating Paper

Dielectric Properties of Epoxy Resin Impregnated Nano-SiO2 Modified Insulating Paper

A Review of Two Nanocomposite Insulating Materials Models: Lewis’ Contribution in the Development of the Models, their Differences, their Similarities and Future Challenges

Space charge characteristics of epoxy-creped paper composites

Contact Info

Product

Resources

About