Khon Kaen University; National Science & Technology Development Agency - Thailand; National Metal & Materials Technology Center (MTEC); Khon Kaen University; King Khalid University; Suranaree University of Technology
Type
Article
Source Title
NANOSCALE RESEARCH LETTERS
Year
2013
Volume
8
Open Access
Green Published, gold
Publisher
SPRINGEROPEN
DOI
10.1186/1556-276X-8-494
Format
PDF
Abstract
Non-Ohmic and dielectric properties of a novel CaCu3Ti4O12/Au nanocomposite were investigated. Introduction of 2.5 vol.% Au nanoparticles in CaCu3Ti4O12 ceramics significantly reduced the loss tangent while its dielectric permittivity remained unchanged. The non-Ohmic properties of CaCu3Ti4O12/Au (2.5 vol.%) were dramatically improved. A nonlinear coefficient of a parts per thousand aEuro parts per thousand 17.7 and breakdown electric field strength of 1.25 x 10(4) V/m were observed. The maximum stored energy density was found to be 25.8 kJ/m(3), which is higher than that of pure CaCu3Ti4O12 by a factor of 8. Au addition at higher concentrations resulted in degradation of dielectric and non-Ohmic properties, which is described well by percolation theory.
Nanotechnology Center (NANOTEC), NSTDA, Ministry of Science and Technology, Thailand through program of Center of Excellence Network; Thailand Graduate Institute of Science and Technology (TGIST)
