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Title: Fabrication and characterization of BST 60/40/PVDF ceramic-polymer composite
Authors: Osińska, Katarzyna
Adamczyk, Małgorzata
Dzik, Jolanta
Bernard, H.
Czekaj, Dionizy
Keywords: BST; PVDF; ceramic-polymer composite; dielectric permittivity
Issue Date: 2012
Citation: "Archives of Metallurgy and Materials" Vol. 56 (4) (2011), s. 1083-1091
Abstract: In this paper BST//PVDF composites with 0-3 connectivity were prepared from (Ba0:6Sr0:4)O3 (BST60/40) ceramic powder and polyvinylidene fluoride (PVDF) powder by a hot pressing method, for different concentration of the ceramic phase (cV ). Morphology of BST//PVDF composites was observed by transmission electron microscopy and scanning electron microscopy, whereas the crystalline structure was studied by the X-ray diffraction method. The temperature dependence of dielectric permittivity of BST//PVDF composites was measured in the frequency range of f =10kHz-1MHz. The split-post dielectric resonator (SPDR) was used for the measurements of the real and imaginary part of dielectric permittivity of BST//PVDF composites in the microwave frequency range of f =3-10GHz. It was found, that the dielectric properties of the ceramic-polymer composite for cV >20% change significantly for both small ( f =10kHz-1MHz) and high ( f =3-10GHz) frequencies. The abrupt increase in permittivity may indicate an excess of the percolation threshold, so the ceramic-polymer composite for the concentrations of the active ceramic phase cV >20% cannot be indexed as composites with 0-3 connectivity.
DOI: 10.2478/v10172-011-0121-x
ISSN: 1733-3490
Appears in Collections:Artykuły (WNŚiT)

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