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Epoxy resin (EP) is widely used as an insulating material in power equipment. Its dielectric relaxation and carrier transport properties are important factors affecting breakdown and surface flashover performance. The dielectric relaxation and carrier transport properties of EP based alumina (Al2O3) microcomposite were investigated through broadband dielectric spectroscopy. The glass transition temperature...
Analyzing the frequency dependences of real and imaginary part of the dielectric permittivities measured at various temperatures we can study the transport mechanisms connected with the ionic hopping motion of charge in ion conductive glasses. The experimental results getting from electric measurements on LiPON phosphate glasses are analyzed, discussed and compared. Arrhenius graphs constructed from...
Hyaluronic acid is a high-molecular-weight polysaccharide found mostly in a human body and widely used in biomedical applications. Our study was focused on its electrical properties in the temperature range 25 K - 325 K and in the frequency range 100 Hz - 1 MHz. Three conductivity regions were found: DC conductivity, universal dielectric response and the super linear power law with the observed frequency...
This paper attempts to summarize the basic molecular mechanisms which control the dielectric properties of glasses and glass-ceramic materials. An analysis of these polarizations reveals that alkali ions are the principal constituents which determine the dielectric loss properties. In glassy materials containing alkali ions in rather large quantities, these ions control the losses over most of the...
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