期刊
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
卷 671, 期 1, 页码 67-77出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/15421406.2018.1542086
关键词
Polymer composites; barium titanate; graphite nanoplatelets; conductivity; permittivity
The electrical properties of L285 epoxy composite materials (CMs) with a mixed filler including graphite nanoplatelets (GNP)/barium titanate(BT) at various GNP concentrations and at 35 wt.% of BT are measured using the AC impedance spectroscopy with frequencies ranging from 1 kHz to 2 MHz. The complex permittivity and its frequency dependence increase with the GNP content. The addition of a BT filler in GNP/L285 CM increases the percolation threshold in addition to a slight increase in the permittivity, allowing a higher GNP content in the composite without the formation of a conductive network. The AC conductivity increases and its dependence on the frequency decreases, as the GNP content increases.
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