In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 27, No. 7 ( 2012-04-14), p. 991-998
Abstract:
Ag nanoparticles were prepared via a wet chemical reduction method and treated with tetraethoxysilane (TEOS) to form an insulating SiO 2 layer on the surface (Ag@SiO 2 ). The Ag@SiO 2 nanoparticles were introduced in to the BaTiO 3 /poly (vinylidene fluoride) matrix to prepare the three-phase Ag@SiO 2 /BaTiO 3 /poly (vinylidene fluoride) composite, and the dielectric behavior of the composite was investigated. The results showed that the typical “conductor/polymer” percolation effect was not observed in the composite as a result of the SiO 2 layer, which prevented Ag particles from contacting with each other directly and restricted the movement of electrons under external field. The high dielectric constant of 723 and a relatively low loss of 0.82 were achieved at 100 Hz with 40 vol% Ag@SiO 2 and 20 vol% BaTiO 3 , respectively. The microcapacitor network model and “Maxwell-Wagner-Sillars” (MWS) effect were used to investigate dielectric properties of the three-phase composite.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2012
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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