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The complex permittivity of epoxy based nanocomposites with alumina and magnesium oxide fillers at very low temperatures

The complex permittivity of epoxy based nanocomposites with alumina and magnesium oxide fillers at very low temperatures
The complex permittivity of epoxy based nanocomposites with alumina and magnesium oxide fillers at very low temperatures
Delivery of energy in areas with a large population density and little space for high voltage equipment is an issue for utility companies in metropolises. Gas insulated switchgear is an alternative to conventional cable systems, enabling higher energy densities. However, the sulfur hexafluoride used in GIS causes environmental problems, which may not be acceptable anymore in a society with emphasis on sustainability. An alternative to this are superconducting cables. High temperature superconducting cables operate at temperatures close to the boiling point of nitrogen, which is 77 K. Not much is known about the dielectric behavior of insulating polymers at such temperatures. This exploratory work investigates how the complex permittivity of epoxy based nanocomposites changes at very low temperatures. A broadband dielectric spectrometer was utilized to acquire the real and imaginary part of the complex permittivity, along with the loss factor. The base polymer for all samples is a commercially available bisphenol-A epoxy with anhydrite hardener. As filler material magnesium oxide powder was used with an average particle size of 22 nm and alumina filler with 50 nm average diameter. Both particle types were modified with a silane coupling agent, in order to achieve a uniform dispersion of particles in the host material. Neat epoxy samples were used as a reference.
978-1-4577-0985-2
306-309
Andritsch, T.
8681e640-e584-424e-a1f1-0d8b713de01c
Kochetov, R.
5647ae09-395a-4845-a4a9-51837a5c9aa0
Morshuis, P.H.F.
59248480-efdb-444e-b3f5-b39a3355315a
Smit, J.J.
21d902fe-6d70-4dff-ad29-3eb8146c0ea5
Andritsch, T.
8681e640-e584-424e-a1f1-0d8b713de01c
Kochetov, R.
5647ae09-395a-4845-a4a9-51837a5c9aa0
Morshuis, P.H.F.
59248480-efdb-444e-b3f5-b39a3355315a
Smit, J.J.
21d902fe-6d70-4dff-ad29-3eb8146c0ea5

Andritsch, T., Kochetov, R., Morshuis, P.H.F. and Smit, J.J. (2011) The complex permittivity of epoxy based nanocomposites with alumina and magnesium oxide fillers at very low temperatures. 2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Cancun, Mexico. 16 - 19 Oct 2011. pp. 306-309 . (doi:10.1109/CEIDP.2011.6232657).

Record type: Conference or Workshop Item (Paper)

Abstract

Delivery of energy in areas with a large population density and little space for high voltage equipment is an issue for utility companies in metropolises. Gas insulated switchgear is an alternative to conventional cable systems, enabling higher energy densities. However, the sulfur hexafluoride used in GIS causes environmental problems, which may not be acceptable anymore in a society with emphasis on sustainability. An alternative to this are superconducting cables. High temperature superconducting cables operate at temperatures close to the boiling point of nitrogen, which is 77 K. Not much is known about the dielectric behavior of insulating polymers at such temperatures. This exploratory work investigates how the complex permittivity of epoxy based nanocomposites changes at very low temperatures. A broadband dielectric spectrometer was utilized to acquire the real and imaginary part of the complex permittivity, along with the loss factor. The base polymer for all samples is a commercially available bisphenol-A epoxy with anhydrite hardener. As filler material magnesium oxide powder was used with an average particle size of 22 nm and alumina filler with 50 nm average diameter. Both particle types were modified with a silane coupling agent, in order to achieve a uniform dispersion of particles in the host material. Neat epoxy samples were used as a reference.

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Published date: October 2011
Venue - Dates: 2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Cancun, Mexico, 2011-10-16 - 2011-10-19
Organisations: EEE

Identifiers

Local EPrints ID: 354475
URI: https://eprints.soton.ac.uk/id/eprint/354475
ISBN: 978-1-4577-0985-2
PURE UUID: 64b0f29d-b4a4-49a2-8c87-b8910d9ca487
ORCID for T. Andritsch: ORCID iD orcid.org/0000-0002-3462-022X

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Date deposited: 30 Jul 2013 13:31
Last modified: 20 Jul 2019 00:38

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