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Applied Physics Letters / Volume 93 / Issue 18 / DIELECTRICS AND FERROELECTRICITY

Appl. Phys. Lett. 93, 182905 (2008); http://dx.doi.org/10.1063/1.3013833 (3 pages)

BaTiO3-carbon nanotube/polyvinylidene fluoride three-phase composites with high dielectric constant and low dielectric loss

Sheng-Hong Yao1, Zhi-Min Dang1, Mei-Juan Jiang1, and JinBo Bai2

1Key Laboratory of Beijing City for Preparation and Possessing of Novel Polymer Materials and Key Laboratory of the Ministry of Education on Nanomaterials, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
2Lab. MSSMAT, CNRS UMR 8579, Ecole Centrale Paris, Grande Voie des Vignes, Châtenay Malabry CEDEX 92295, France

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(Received 4 June 2008; accepted 15 October 2008; published online 4 November 2008)

A three-phase composite with multiwall carbon nanotube (MWNT) and BaTiO3 particles embedded into polyvinylidene fluoride (PVDF) was prepared. The uniform dispersion of fillers was realized, and the dielectric constant was as high as 151 at 102 Hz when the volume fraction of MWNT and BaTiO3 were 0.01 and 0.15, respectively. The BaTiO3-MWNT/PVDF composite with high dielectric constant displayed relatively low dielectric loss and good flexibility due to the low concentrations of MWNT and BaTiO3. The results can be explained by the space charge polarization at the interfaces between the conductor and the insulator and the evolutions of conductive pathway and microcapacitance structure.

© 2008 American Institute of Physics

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KEYWORDS and PACS

Keywords

barium compounds, carbon nanotubes, dielectric losses, dielectric materials, filled polymers, permittivity

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3013833

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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