Structure and dielectric properties of polyethylene nanocomposites containing calcined zirconia

The current work investigates the effects of filler calcination on the structure and dielectric properties of polyethylene/zirconia (ZrO 2 ) nanocomposites. Calcination temperatures of 600 and 900 °C have been applied to ZrO 2 in an attempt to modify its surface chemistry and structure. Calcination...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2019-10, Vol.26 (5), p.1541-1548
Main Authors: Rahim, N. H., Lau, K. Y., Muhamad, N. A., Mohamad, N., Tan, C. W., Vaughan, A. S.
Format: Article
Language:English
Subjects:
breakdown
Calcination
dielectric
Dielectric properties
Dielectrics
Electric breakdown
Moisture content
Nanocomposites
Organic chemistry
Photomicrography
Polyethylene
Polyethylenes
Roasting
Scanning electron microscopy
zirconia
Zirconium dioxide
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Summary:The current work investigates the effects of filler calcination on the structure and dielectric properties of polyethylene/zirconia (ZrO 2 ) nanocomposites. Calcination temperatures of 600 and 900 °C have been applied to ZrO 2 in an attempt to modify its surface chemistry and structure. Calcination results in a slight reduction in the concentration of physically adsorbed water on ZrO 2 and, in addition, structural reorganization of the ZrO 2 nanopowder. Consequently, the real permittivity of nanocomposites containing calcined ZrO 2 is reduced compared to nanocomposites containing uncalcined ZrO 2 . Furthermore, the DC breakdown strength of nanocomposites containing calcined ZrO 2 improves compared to nanocomposites containing uncalcined ZrO 2 . Since the removed water content is minimal, we primarily attribute the observed dielectric results to structural changes in ZrO 2 rather than water-related effects. As such, calcining can have positive effects in enhancing the dielectric properties of ZrO 2 -based nanocomposites.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2019.008149