Understanding electrical discharge endurance of epoxy micro- and nano-composites through thermal analysis

Iyer, G.; Gorur, R.S.; Krivda, A.

doi:10.1109/tdei.2014.6740744

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…Moreover, it was found that thermogravimetric analysis (TGA) and corona resistance are related. Particularly, the micro‐nano silica addition can improve the thermal performance and corona resistance of hybrid composite materials 20 . The electrical and mechanical properties of hybrid composites can be significantly improved by coating micro‐silica with nano titanium dioxide 21 .…”

Section: Introductionmentioning

confidence: 99%

Charge dynamics and thermal properties of epoxy based micro and nano hybrid composites at high temperatures

Chen

Dai

Hong

et al. 2021

J of Applied Polymer Sci

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This paper presents the effects of the filler type and testing temperature on the charge dynamics and thermal properties of the epoxy resin. The micro‐nano hybrid composites with different content of the micro and nano aluminum nitride (AlN) fillers are fabricated. The morphology of micro‐nano hybrid composites is characterized. Electrical testing and thermal analysis methods are adopted to analyze its electrical and thermal performance. The results show that the space charge accumulation is suppressed and the charge decay process is facilitated in the hybrid composites. The electrical performances of the hybrid composites are enhanced by the nano‐fillers. The apparent mobility and activation energy are decreased with nano‐AlN fillers in the composites at the high temperature. The glass transition temperature and thermal stability of the materials is improved with the nano‐AlN. A hypothetical mechanism is proposed to explain the charge carrier injection and transport of the composites at different temperatures.

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Section: Introductionmentioning

confidence: 99%

Charge dynamics and thermal properties of epoxy based micro and nano hybrid composites at high temperatures

Chen

Dai

Hong

et al. 2021

J of Applied Polymer Sci

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“…Couderc et al 33 studied the effects of quartz and montmorillonite on the dielectric relaxation and breakdown strength of EP. Iyer et al 34 found that the micro‐nano silica can improve the thermal properties and corona resistance of composites. Babu et al 12 studied the improvement due to nano‐titanium dioxide and micro‐silica addition on the electrical and mechanical properties of composite materials.…”

Section: Introductionmentioning

confidence: 99%

Influences of nanoparticle content on electrical and thermal performances of micro‐nano hybrid composites for packaging materials

Dai

Chen

Meng

et al. 2021

J of Applied Polymer Sci

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This paper presents electrical and thermal properties of a novel type of micro‐nano hybrid composites to be potential for packaging. The micro‐nano hybrid composites contain 20 wt% of micro‐aluminium nitride (AlN) with 1, 3, and 5 wt% of nano‐AlN, respectively. Electrical measurement and thermal analysis are used to analyze the performances. The results show that the nano‐AlN in the hybrid composites can suppress the space charge accumulation near the cathode and facilitate the conversion of hetero charge into the homo‐charge accumulations near the anode. No apparent electric field distortion can be observed in the M20N3 sample, whereas it exhibits a minimum electrical conductivity and highest thermal conductivity amongst all samples. Furthermore, the nano‐filler addition can enhance the DC breakdown strength and the thermal stability of the hybrid composites. The thermal and electrical conduction mechanism of the micro and nano fillers in the hybrid composites is also elucidated.

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“…Epoxy resin and its composites are gaining considerable importance in electrical applications such as bushings, spacers, cable terminations, machine insulations etc., because of their inherent properties such as light weight, high density, low wettability, viscosity with excellent thermal endurance and a costeffective material [1][2][3]. In addition, as compared to their counterpart microcomposites epoxy nanocomposites have better electrical properties such as improved conductivity, permittivity, dielectric loss, and breakdown strength [1,4,5].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of epoxy nanocomposites due to water droplet‐initiated discharges under AC and DC voltages and localisation of discharges

Mishra¹,

Desai²,

Sarathi³

et al. 2019

IET Science, Measurement & Technology

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Corona inception voltage (CIV) due to water droplet sitting over the surface of epoxy nanocomposite material depends on supply voltage frequency, the conductivity of water droplet and the contact angle of the test specimens. The contact angle of the specimen and CIV due to water droplet has a direct correlation. It is realised that the CIV is high under negative DC and the least under AC voltages. Surface charge accumulation studies indicate that the accumulated charge and its decay time constant reduces in the damage-caused zone due to corona activity. The ultra-high frequency (UHF) signal generated due to water droplet-initiated corona activity has frequency content in the range of 0.8-1 GHz. The localisation of incipient discharges is demonstrated by using the non-iterative technique and the cross recurrence plot (CRP) technique is used to estimate the time difference of arrival (TDOA) of UHF signals generated due to water droplet-initiated discharge. Laser-induced breakdown spectroscopy (LIBS) depicts the elemental composition and reveals the difference in plasma temperature and threshold fluence between all the test specimens. In short, the performance of ion trapping particle filled epoxy nanocomposite performance is found to be best followed by titania filled epoxy nanocomposite and the base epoxy resin.

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Understanding electrical discharge endurance of epoxy micro- and nano-composites through thermal analysis

Cited by 8 publications

References 15 publications

Charge dynamics and thermal properties of epoxy based micro and nano hybrid composites at high temperatures

Charge dynamics and thermal properties of epoxy based micro and nano hybrid composites at high temperatures

Influences of nanoparticle content on electrical and thermal performances of micro‐nano hybrid composites for packaging materials

Performance analysis of epoxy nanocomposites due to water droplet‐initiated discharges under AC and DC voltages and localisation of discharges

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