Thermal and electrical properties of epoxy composite with expanded graphite-ceramic core-shell hybrids
Source abstract
Abstract
Abstract Expanded graphite (EG) was coated with an insulating ceramic shell (SiO2 or boron nitride (BN)/SiO2) using a simple sol-gel process, and epoxy composites were prepared with these hybrid fillers. The electrical and thermal properties of the epoxy composite were investigated. The surface resistivity of the EG-BN-epoxy composite decreased rapidly to 100 Ω/sq. with filler contents greater than 5 wt%. However, the surface resistivity showed 1013 Ω/sq. for epoxy composites with SiO2/EG or BN/SiO2/EG contents greater than 5 wt%. Furthermore, the breakdown strength of the ceramic/EG-BN-epoxy composite was greater than that of the EG-BN-epoxy composite. Although coating of SiO2 with low thermal conductivity, the thermal conductivity of epoxy composites with low SiO2/EG or BN/SiO2/EG filler content was greater than that of the BN-epoxy composite due to improved adhesion between SiO2 and polymer resin interface.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Thermal properties of materials · Graphene research and applications · High voltage insulation and dielectric phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
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