0000000000377328

AUTHOR

A. Dardano

showing 4 related works from this author

Space Charge Dynamics in Nanostructured Epoxy Resin

2008

The results of a comparative analysis performed on specimens of nanostructured epoxy resins obtained by different filler concentrations are reported in this paper. The specimens were prepared by dispersion of bohemite nanoparticles into a cycloaliphatic epoxy resin cross linked under UV. Dielectric properties, in particular space charge accumulation, are measured as a function of nanofiller content. Results indicate that space charge build up and charge mobility are affected largely by filler content. Concentrations of nanofiller of 5-7 wt% show a significant decrease of the space charge with respect to the base epoxy-resin and an increased mobility of negative carriers .

chemistry.chemical_classificationFiller (packaging)Materials scienceBase (chemistry)NanoparticlePolymerEpoxyDielectricSpace chargechemistryvisual_artvisual_art.visual_art_mediumComposite materialDispersion (chemistry)2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena
researchProduct

Electrical Aging Tests on Enameled Wire Exposed to Gamma Irradiation

2011

Electrical agingIndustrial plantsMaterials sciencebusiness.industryStatorsGamma raysTestingGAMMA IRRADIATION ELECTRICAL AGINGElectrical engineeringElectrical treeingWindingThermosetsElectric brazingInsulating materialsPartial dischargesElectromechanical devicesIrradiationElectric brazing; Electromechanical devices; Gamma rays; Industrial plants; Insulating materials; Irradiation; Partial discharges; Stators; Testing; Thermosets; WindingComposite materialbusinessSettore ING-IND/19 - Impianti NucleariGamma irradiation
researchProduct

Electrical tree growth in EVA-layered silicate nanocomposites

2006

This work deals with the growth of electrical treeing in different EVA-layered silicate nanostructured compounds. The experimental activity evidenced that the intercalated nanocomposites have longer lifetimes than pure EVA under the same constant AC stress conditions. A monitoring of the tree growth morphology allowed to evidence very interesting features of the intercalated nano-compounds showing a barrier effect to the treeing path. A preliminary investigation on the possible arrangement of the filler particles inside the matrix was also carried out.

chemistry.chemical_compoundNanocompositeMorphology (linguistics)Materials sciencechemistryBarrier effectElectrical treeingStress conditionsComposite materialSilicate2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena
researchProduct

Electrical treeing in EVA-bohemite and EVA-montmorillonite nanocomposites

2009

The present experimental work focuses on the growth of electrical treeing inside different Ethylene-vinyl acetate (EVA) nanocomposites containing Bohemite (an aluminum oxide hydroxide) and Montmorillonite (a phyllosilicate clay mineral) nanoparticles. Bohemite and Montmorillonite particles have different aspect ratios: the first one has a nanometric cube-like symmetry, while the latter has a typical layered structure. The results evidence that the growth of the electrical treeing inside the original polymer can be altered significantly by the dispersion of inorganic nanoparticles.

chemistry.chemical_classificationBoehmiteMaterials scienceNanocompositeNanoparticlePolymerElectrical treeing.chemistry.chemical_compoundMontmorillonitechemistryChemical engineeringClay mineralsDispersion (chemistry)
researchProduct