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dc.contributor.authorDeepa, K S-
dc.contributor.authorShaiju, P-
dc.contributor.authorSebastian, M T-
dc.contributor.authorBhoje Gowd, E-
dc.contributor.authorJose James-
dc.identifier.citationPhysical Chemistry Chemical Physics 16(32):17008-17017;28 Aug 2014en_US
dc.description.abstractDielectric composites composed of poly(vinylidene fluoride) (PVDF) and La0.5Sr0.5CoO3-delta (LSCO) with high permittivity, low loss and high breakdown strength have been developed. The effects of particle size of LSCO (fine (250 nm) and coarse (3 mum)) on the phase crystallization of PVDF and dielectric properties of polymer-LSCO composites are studied. The inclusion of fine LSCO into PVDF readily favours the formation of polar crystals (beta and gamma-phases), which makes the composite suitable for both electromechanical and high charge storage embedded capacitor applications. Moreover, the addition of fine LSCO particles also increases the overall crystallization rate as well as the melting point of PVDF. The composite containing fine LSCO particles gave a percolation threshold at about 25 volume percentage, while that with coarse particles did not show any percolation even at very high volume percentage. As a result of fine LSCO particle loading, the composite exhibited a relative permittivity (epsilonr) of 600, a conductivity of 2.7 * 10(-7) S cm(-1), a dielectric loss (tandelta) of 0.7 at 1 kHz and a breakdown voltage of 100 V even at 20 volume percentage of a filler, demonstrating promising applications in the embedded capacitors.en_US
dc.publisherRoyal Society of Chemistryen_US
dc.subjectDielectric compositesen_US
dc.subjectPoly(vinylidene fluoride)en_US
dc.subjectPolar crystalsen_US
dc.subjectLSCO particlesen_US
dc.titlePoly(vinylidene fluoride)–La0.5Sr0.5CoO3-delta composites: the influence of LSCO particle size on the structure and dielectric propertiesen_US
Appears in Collections:2014

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