Shaohua Li, Xidong Liang, A. Prasad, L. Schadler, J. K. Nelson, Yanfeng Gao
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Low Frequency Dielectric Response of Silicone/ZrO2 Nanocomposites
To understand the influence of nanofillers on the dielectric spectra of nanocomposites, this paper examines the low frequency dielectric responses for silicone/ZrO2nanocomposites with different filler loadings. The ZrO2 nanoparticles were grafted with 1k and 10k molecular weight polydimethylsiloxane (PDMS) in order to achieve good dispersion in the PDMS matrix. The relative permittivity at infinite frequency and dc conductance were calculated through Kramers-Kronig relations and successfully differentiated from the measured spectra. The influence of temperature and filler loading on these two parameters and the shape of dielectric spectra is discussed.
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