Journal
JOURNAL OF APPLIED PHYSICS
Volume 107, Issue 12, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3437633
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- CSIR, Government of India
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Homogeneous thick film (similar to 0.10 mm) of high dielectric K0.05Ti0.02Ni0.93O; abbreviated as KTNO/polyvinylidene fluoride (PVDF) composite has been prepared by hot-molding technique. The frequency and temperature dependent dielectric behavior of this composite has been studied by varying the KTNO volume fraction (f(KTNO)). Near the percolation threshold (f(KTNO)=0.40), a large enhancement of effective dielectric permittivity (epsilon(eff)similar to 400 which is 40 times higher than that of pure PVDF) with low loss (similar to 0.20 at 1 kHz) is observed. The experimental epsilon(eff) data have been fitted with different theoretical models and found to follow percolation theory successfully. Such a high epsilon(eff) and low loss flexible dielectric material appears to be suitable for technological applications. (c) 2010 American Institute of Physics. [doi:10.1063/1.3437633]
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