Effects of interface on electrical conduction in epoxy resin composites

Kawamoto, Atsushi; Suzuoki, Yasuo; Ikejiri, Tadao; Mizutani, Tomoko; Ieda, Masayuki

doi:10.1109/icpadm.1991.172136

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…However, the characteristics above 100 • C are very different indeed for the two filler sizes. This is the region identified as due to the release of space charge in epoxy resins [18]-the ρ peak shown in figure 11.…”

Section: Thermally Stimulated Currentsmentioning

confidence: 96%

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Internal charge behaviour of nanocomposites

Nelson¹,

Fothergill²

2004

Nanotechnology

483

304

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The incorporation of 23 nm titanium dioxide nanoparticles into an epoxy matrix to form a nanocomposite structure is described. It is shown that the use of nanometric particles results in a substantial change in the behaviour of the composite, which can be traced to the mitigation of internal charge when a comparison is made with conventional TiO 2 fillers. A variety of diagnostic techniques (including dielectric spectroscopy, electroluminescence, thermally stimulated current and photoluminescence) have been used to augment pulsed electro-acoustic space charge measurement to provide a basis for understanding the underlying physics of the phenomenon. It would appear that, when the size of the inclusions becomes small enough, they act cooperatively with the host structure and cease to exhibit interfacial properties, leading to Maxwell-Wagner polarization. It is postulated that the particles are surrounded by high charge concentrations in the Gouy-Chapman-Stern layer. Since nanoparticles have very high specific areas, these regions allow limited charge percolation through nano-filled dielectrics.The practical consequences of this have also been explored in terms of the electric strength exhibited. It would appear that there was a window in which real advantages accrue from the nano-formulated material. An optimum loading of about 10% (by weight) is indicated.

show abstract

Section: Thermally Stimulated Currentsmentioning

confidence: 96%

“…This is the region identified as due to the release of space charge in epoxy resins [18]-the ρ peak shown in figure 11.…”

Section: Thermally Stimulated Currentsmentioning

confidence: 99%

Internal charge behaviour of nanocomposites

Nelson¹,

Fothergill²

2004

Nanotechnology

483

304

View full text Add to dashboard Cite

show abstract

High-humidity deterioration and internal structure change of epoxy resin for electrical insulation

Kumazawa

Oishi

Todoki

1994

IEEE Trans. Dielect. Electr. Insul.

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Electrical properties of TiO/sub 2/ nanocomposites

Nelson

Thiticharoenpong

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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The incorporation of 38 nm titanium dioxide nanoparticles into an epoxy matrix to form a nanocomposite structure is described. The practical use of such materials has been evaluated through careful measurements of their electric strength made using recessed specimens as a function of particulate loading in comparison with an equivalent conventional resin formulated with micro-scale Ti02 ffler. The results would suggest that significant advantages accrue from the nano-formulated material in keeping with the known reduction in internal space charge accumulation earlier determined by pulse electroacoustic measurements. Furthermore, it is demonstrated that an optimum loading is indicated at about 10 % (by weight).Based on additional thermally stimulated current and electroluminescence data, some suggestions are advanced which explain the improved performance in terms of the mitigating effects of trapped entanglement on the Maxwell-Wagner effect.

show abstract

Effects of interface on electrical conduction in epoxy resin composites

Cited by 8 publications

References 3 publications

Internal charge behaviour of nanocomposites

Internal charge behaviour of nanocomposites

High-humidity deterioration and internal structure change of epoxy resin for electrical insulation

Electrical properties of TiO/sub 2/ nanocomposites

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