Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-08T07:20:37.506Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure and dielectric behavior of the three-phase Ag@SiO2/BaTiO3/PVDF composites with high permittivity

Published online by Cambridge University Press:  29 February 2012

Xianwen Liang ,
Shuhui Yu ,
Rong Sun ,
Suibin Luo ,
Jie Wan ,
Shuhui Yu ,
Rong Sun ,
Suibin Luo ,
Xianwen Liang  and
Jie Wan
...Show all authors
Xianwen Liang
Affiliation:
Center for Precision Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen University Town, Shenzhen 518055, China
Shuhui Yu*
Affiliation:
Center for Precision Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen University Town, Shenzhen 518055, China
Rong Sun*
Affiliation:
Center for Precision Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen University Town, Shenzhen 518055, China
Suibin Luo
Affiliation:
Center for Precision Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen University Town, Shenzhen 518055, China
Jie Wan
Affiliation:
Center for Precision Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen University Town, Shenzhen 518055, China
Shuhui Yu*
Affiliation:
The Chinese University of Hong Kong, Shatin, N.T. Hong Kong 999077, China
Rong Sun*
Affiliation:
The Chinese University of Hong Kong, Shatin, N.T. Hong Kong 999077, China
Suibin Luo
Affiliation:
The Chinese University of Hong Kong, Shatin, N.T. Hong Kong 999077, China
Xianwen Liang
Affiliation:
Department of Materials Science and Engineering, South China University of Technology, Tianhe District, Guangzhou 510641, China
Jie Wan
Affiliation:
Department of Materials Science and Engineering, South China University of Technology, Tianhe District, Guangzhou 510641, China
Zhiqiang Zhuang
Affiliation:
Department of Materials Science and Engineering, South China University of Technology, Tianhe District, Guangzhou 510641, China
*
a)Address all correspondence to thses authors. e-mail: [email protected]
b)e-mail: [email protected]
a)Address all correspondence to thses authors. e-mail: [email protected]
b)e-mail: [email protected]
Get access

Abstract

Ag nanoparticles were prepared via a wet chemical reduction method and treated with tetraethoxysilane (TEOS) to form an insulating SiO2 layer on the surface (Ag@SiO2). The Ag@SiO2 nanoparticles were introduced in to the BaTiO3/poly (vinylidene fluoride) matrix to prepare the three-phase Ag@SiO2/BaTiO3/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 SiO2 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@SiO2 and 20 vol% BaTiO3, respectively. The microcapacitor network model and “Maxwell-Wagner-Sillars” (MWS) effect were used to investigate dielectric properties of the three-phase composite.

Keywords

Core/shellDielectric propertiesComposite
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 7 , 14 April 2012 , pp. 991 - 998
Copyright
Copyright © Materials Research Society 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Pecharroman, C., Fatima, E.B., and Moya, J.S.: New percolative BaTiO3-Ni composites with a high and frequency-independent dielectric constant (epsilon(r) approximate to 80,000). Adv. Mater. 13, 1541 (2001).3.0.CO;2-X>CrossRefGoogle Scholar
2.Wu, J.J. and McLachlan, D.S.: Percolation exponents and thresholds obtained from the nearly ideal continuum percolation system graphite-boron nitride. Phys. Rev. B 56, 1236 (1997).CrossRefGoogle Scholar
3.Wu, J.J. and McLachlan, D.S.: Scaling behavior of the complex conductivity of graphite boron nitride percolation systems. Phys. Rev. B 58, 14880 (1998).CrossRefGoogle Scholar
4.Brosseau, C.: Generalized effective medium theory and dielectric relaxation in particle-filled polymeric resins. J. Appl. Phys. 91, 3197 (2002).CrossRefGoogle Scholar
5.Li, Q., Xue, Q.Z., Hao, L.Z., Gao, X.L., and Zheng, Q.B.: Large dielectric constant of the chemically functionalized carbon nanotube/polymer composites. Compos. Sci. Technol. 68, 2290 (2008).CrossRefGoogle Scholar
6.Shen, Y., Lin, Y.H., and Nan, C.W.: Interfacial effect on dielectric properties of polymer nanocomposites filled with core/shell-structured particles. Adv. Funct. Mater. 17, 2405 (2007).CrossRefGoogle Scholar
7.Xu, J.W. and Wong, C.P.: Effects of the low loss polymers on the dielectric behavior of novel aluminum-filled high-K nNanocomposites. in 9th International Symposium on Advanced Packaging Materials: Processes, Properties and Interfaces, Las Vegas, NV, 2004, p. 496.Google Scholar
8.Gong, J.L., Liang, Y., Huang, Y., Chen, J.W., Jiang, J.H., Shen, G.L., and Yu, R.Q.: Ag/SiO2 core-shell nanoparticle-based surface-enhanced Raman probes for immunoassay of cancer marker using silica-coated magnetic nanoparticles as separation tools. Biosens. Bioelectron. 22, 1501 (2007).CrossRefGoogle ScholarPubMed
9.Xu, K., Wang, J.X., Kang, X.L., and Chen, J.F.: Fabrication of antibacterial monodispersed Ag-SiO2 core-shell nanoparticles with high concentration. Mater. Lett. 63, 31 (2009).CrossRefGoogle Scholar
10.Dang, Z.M., Shen, Y., and Nan, C.W.: Dielectric behavior of three-phase percolative Ni-BaTiO3/polyvinylidene fluoride composites. Appl. Phys. Lett. 81, 4814 (2002).CrossRefGoogle Scholar
11.Graf, C., Vossen, D.L., Imhof, A., and Blaaderen, A.V.: A general method to coat colloidal particles with silica. Langmuir 19, 6693 (2003).CrossRefGoogle Scholar
12.Arlt, G., Hennings, D., and Dewith, G.: Dielectric properties of fine-grained barium titanate ceramics. J. Appl. Phys. 58, 1619 (1985).CrossRefGoogle Scholar
13.Maxwell, J.C.: Electricity and Magnetism, 1st ed. (Oxford: Clarendon Press, Oxford, England, 1892) p. 452, 1.Google Scholar
14.Wagner, K.W.: Study on the interfacial polarization of the dielectrics based on Maxwell-Wagner-Sillars. Archiv. Für. Elektrotechnik. 2, 87 (1914).Google Scholar
15.Sillars, R.W.: The behavior of polar molecules in solid paraffin wax. Proc. R. Soc. London, Ser. A 169, 66 (1939).Google Scholar
16.Nan, C.W.: Physics of inhomogeneous inorganic materials. Prog. Mater Sci. 37, 1 (1993).CrossRefGoogle Scholar
17.Kakimoto, K., Furuhashi, J., Ogawa, H., and Aki, M.: Microstructure and dielectric response of (Ba, Sr)TiO3 filler-dispersed resin composites. J. Eur. Ceram. Soc. 30, 2 (2010).CrossRefGoogle Scholar
18.Kochervinskii, V., Malyshkina, I., Gavrilova, N., Sulyanov, S., and Bessonova, N.: Peculiarities of dielectric relaxation in poly (vinylidene fluoride) with different thermal history. J. Non-Cryst. Solids 353, 51 (2007).CrossRefGoogle Scholar
19.Dang, Z.M., Lin, Y.H., and Nan, C.W.: Novel ferroelectric polymer composites with high dielectric constants. Adv. Mater. 15, 1625 (2003).CrossRefGoogle Scholar
20.Sun, L.L., Li, B., Zhang, Z.G., and Zhong, W.H.: Achieving very high fraction of β-crystal PVDF and PVDF/CNF composites and their effect on AC conductivity and microstructure through a stretching process. Eur. Polym. J. 46, 2112 (2010).CrossRefGoogle Scholar