Ceramic–Polymer Composites with High Dielectric Constant


  • The research was partially supported by a 3M non-tenured faculty grant and an AU competitive grant.


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Semiconductorlike CaCu3Ti4O12ceramic powders are filled into a poly(vinylidene fluoride-trifluoroethylene) copolymer matrix to form a flexible composite. The dielectric constant of the composites at 100 Hz reaches more than 600 at room temperature and 1200 at 70 °C, as shown in the figure. The contribution of the heterogeneous relaxation is partially responsible for the high dielectric constant observed here.