Micro- and nanosized effect of Ba(Fe0.5Nb0.5)O3 fillers on dielectric properties of Ba(Fe0.5Nb0.5)O3/PVDF composites

Author

Mingrui Fang ; Zhuo Wang ; Haijuan Li ; Yongfei Wen ; Chun Wang

Author_Institution

Sch. of Mater. Sci. & Eng., Shaanxi Univ. of Sci. & Technol., Xi´an, China

fYear

2015

fDate

24-27 May 2015

Firstpage

112

Lastpage

115

Abstract

Polymer based composites with high dielectric permittivity and low dielectric loss are realized by employing giant dielectric permittivity Ba(Fe_0.5Nb_0.5)O₃ (BFN) powder as a functional inorganic filler and poly(vinylidene fluoride) (PVDF) as polymer matrix. Micro- and nanosized BFN powders were obtained via the conventional solid-state reaction method and the oxalate coprecipitation method, separately. The morphology and dielectric properties of micro-BFN/PVDF and nano-BFN/PVDF composites have been characterized and investigated comparatively. The nano-BFN/PVDF composites show much higher values of permittivity than micro-BFN/PVDF composites in all of concentrations, which is due to the more interfacial polarization effect causing by larger interfacial areas in the composites containing nanometer scale BFN fillers. At the same time, the dielectric loss of nano-BFN/PVDF composites is as low as that of micro-BFN/PVDF composites.

Keywords

barium compounds; dielectric losses; dielectric polarisation; filled polymers; materials preparation; nanoparticles; permittivity; powders; precipitation (physical chemistry); size effect; Ba(Fe_0.5Nb_0.5)O₃; dielectric loss; filler microsized effect; filler nanosized effect; functional inorganic filler; giant dielectric permittivity powder; interfacial areas; interfacial polarization effect; oxalate coprecipitation method; poly(vinylidene fluoride); polymer based composites; solid-state reaction method; Ceramics; Dielectric constant; Dielectric losses; Permittivity; Polymers; Powders; Microsized BFN; dielectric properties; interfacial polarization; nanosized BFN; polymer-based composites;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectric, International Symposium on Integrated Functionalities and Piezoelectric Force Microscopy Workshop (ISAF/ISIF/PFM), 2015 Joint IEEE International Symposium on the

Conference_Location

Singapore

Type

conf

DOI

10.1109/ISAF.2015.7172682

Filename

7172682