Journal
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
Volume 11, Issue 1, Pages 85-88Publisher
UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS
DOI: 10.1590/S1516-14392008000100016
Keywords
polymer-matrix composites (PMCs); electrical properties; composites
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Funding
- National Research Council of Science and Technology of Argentina (CONICET)
- FAPESP
- CNPq
- CAPES
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The dielectric behavior of composite materials (epoxy resin-barium titanate and epoxy-CCTO) was analysed as a function of ceramic amount. Composites were prepared by mixing the components and pouring them into suitable moulds. In some compositions, the matrix was reduced by tetrahydrofuran (THF) incorporation. Samples containing various amounts of ceramic filler were examined by TG/DTA and scanning electron microscopy analysis. Dielectric measurements were performed from 20 Hz to 1 MHz and 30 to 120 degrees C. It was demonstrated that the epoxy-CCTO composites possessed higher permittivity than classic epoxy-BaTiO3 composites. However, the low resin permittivity prevailed in the composite dielectric performance.
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