Investigation on the thermal properties, space charge and charge trap characteristics of silicone rubber nano–micro composites

The micro-aluminium trihydrate (ATH) and nano-alumina fillers in the silicone rubber (SR) significantly improve the electrical, thermal and mechanical properties. ATH fillers improved the resistance to the corona ageing and water droplet-initiated erosion. Scanning electron microscopy (SEM) analysis...

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Bibliographic Details
Published inElectrical engineering Vol. 103; no. 3; pp. 1779 - 1790
Main Authors Vinod, Pabbati, Desai, Belaguppa Manjunath Ashwin, Sarathi, R., Kornhuber, Stefan
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2021
Springer Nature B.V
Subjects
Aluminum hydroxide
Charge distribution
Composite materials
Droplets
Economics and Management
Electric fields
Electrical Engineering
Electrical Machines and Networks
Energy Policy
Engineering
Fillers
Mechanical properties
Original Paper
Power Electronics
Silicone resins
Silicone rubber
Silicones
Space charge
Thermal conductivity
Thermal stability
Thermodynamic properties
Water damage
Water drops
ATH
Space charge
Thermal conductivity
Corona
Alumina
Silicone rubber
Surface potential
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Summary:The micro-aluminium trihydrate (ATH) and nano-alumina fillers in the silicone rubber (SR) significantly improve the electrical, thermal and mechanical properties. ATH fillers improved the resistance to the corona ageing and water droplet-initiated erosion. Scanning electron microscopy (SEM) analysis was carried out to understand degradation condition caused due to corona ageing and damage caused due to water droplet-initiated discharges. The inclusion of these fillers significantly altered the surface and bulk charge distribution characteristics of the polymer. A right shift is observed in the trap distribution characteristics. The reduced electric field threshold limit for space charge formation is observed with composites, due to increment in impurities/agglomerations with respect to increment in filler concentration. Performance of composites subjected to polarity reversal is improved on inclusion of nano-filler in addition to micro-filler. The inclusion of fillers enhanced the thermal conductivity and improved significantly thermal stability of the SR composite.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-020-01195-0