M. A. Olariu

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The present paper is presenting a study regarding the dielectric behavior of a polymeric matrix based on polypropylene (PP) reinforced with 5% wt of multi-walled carbon nanotubes (MWCNTs). A complex qualitative and quantitative analysis of real and imaginary permittivity evolution as function of frequency and temperature allowing the understanding of(More)
Samples composed of a polymer matrix were loaded with different fractions from 0% to 30% of Fe oxide magnetic nanoparticles with an average size ranging from 5 to 25 nm. The permittivity and permeability of the composites were determined upon a very wide frequency range, spanning from DC to 30 GHz using different methods with overlapping frequency(More)
Focused on the analysis of some parameters derived from pulse electroacoustic measurements, the article tries to identify the evolution of space charge and field in paper-oil systems submitted to gamma radiation, and to emphasize, by comparing to unaged structures, some aspects susceptible to lead to a higher reliability of DC cables insulation for nuclear(More)
This paper illustrates the effects of ferromagnetic nanoparticles on dielectric and magnetic properties of a polyolefinic adhesive polymer. The dielectric characteristics analyzed were the real and imaginary part of complex permittivity and dielectric losses of adhesive samples containing iron oxide nanoparticles. The analyzed magnetic parameters analyzed(More)
—Nowadays, because the synthesis of new materials is a very active field of research and industrial development, the different types of materials available for electromagnetic shielding structures is always increasing. Conducting polymers exhibit excellent electrical, electrochemical and optical properties; however the common usage of these materials has(More)
This work is part of an extended study about space charge features of polymeric based insulation for different applications, and deals peculiarly with the influence of cyclic poling field upon charge accumulation processes. The materials involved in the present paper are PET and PTFE of different thickness and for the determination of the electric field and(More)
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