Dielectric properties of epoxy and polyethylene nanocomposites

Zhang, Chao; Mason, Ralf; Stevens, G.C.

doi:10.1109/iseim.2005.193571

Cited by 9 publications

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

The effect of SiO₂ nano-filler on dielectric properties of epoxy resin

Kúdelčík

Jahoda

Kurimský

2019

Eur. Phys. J. Appl. Phys.

View full text Add to dashboard Cite

The paper presents the impact of SiO2 nano-filler in epoxy resin (ER) on changes of dielectric properties and time to the breakdown. Several composites were tested with the mass fraction of 0.5 wt%, 1 wt% and 2 wt% of SiO2, respectively. The frequency spectra of the real and imaginary parts of complex dielectric constant were measured by a capacitance method within the frequency range from 1 mHz to 1 MHz. The mass fraction 0.5 wt% nanoparticles (NPs) in ER caused the evident decrease of the complex permittivity, while 1 wt% or 2 wt% yielded similar permittivity as measured in the pure ER sample. This change of the permittivity with the nano-filler concentration is discussed on the basis of the multi-core model. Moreover, SiO2 NPs also caused the frequency shift of the local maximum of permittivity to lower frequencies which corresponds with the α-polarization process. The internal partial discharges in the ER and its mixtures with the SiO2 nano-filler by the galvanic method and acoustic method are presented. The decrease of the time to breakdown with the increase of SiO2 the mass fraction is reported, too.

show abstract