Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
817826 | Composites Part B: Engineering | 2014 | 10 Pages |
Abstract
New composites with high dielectric constant and low dielectric loss, based on expanded graphite (EG), CaCuTi4O12 (sCCTO) and cyanate ester (CE) resin, were developed by controlling the interaction between EG and sCCTO. Difference from EG, surface modified EG (mEG) has an additional strong chemical interaction with sCCTO, this not only improves the dispersion of fillers, but also enhances the filler-matrix interfacial adhesion, leading to different micro-structures and dielectric properties. Specifically, the percolation thresholds of mEG/sCCTO/CE and EG/sCCTO/CE composites are 3.45Â vol% and 2.86Â vol%, respectively. When the loading of conductors approaches the percolation threshold, mEG/sCCTO/CE composite has much higher dielectric constant and lower dielectric loss than EG/sCCTO/CE composite. The nature behind these attractive data was revealed by building an equivalent circuit.
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Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Longcheng Gu, Guozheng Liang, Yanping Shen, Aijuan Gu, Li Yuan,