Effects of nano- and micro-filler mixture on electrical insulation properties of epoxy based composites

Electrical and Thermal Characterization of Organic Varnish Filled with ZrO2Nano Filler Used in Electrical Machines

“…Here the dielectric measurements were carried out by Impedance spectroscopy (LCR HITESTER 3532-50) measuring instrument. It was also an experimental method of characterizing electrochemical systems [9][10][11][12]. This technique was also used to measure the impedance of a system over a range of frequencies, and the frequency response of the system including the energy storage and dissipation properties.…”

“…Process of tracking the specimen. In SEM, the image may be produced in a number of ways from variations in the intensity of secondary electrons back-scattered from the specimen through to Xray emission produced by inelastic collisions of the primary beam with bound electrons in the specimen [8][9][10]. From the analyzed SEM image the particles were in the form of nano metric range varies for one area to other.…”

“…PD was usually beginning within voids, cracks, or inclusions within a solid dielectric, at conductor-dielectric interfaces within solid or liquid dielectrics, or in bubbles within liquid dielectrics. For solid insulating materials, certain criteria were available for the measurement of the breakdown voltage or the breakdown field strength on plate-like samples in a homogeneous or weakly inhomogeneous field [10][11][12]. A standardized testing arrangement for the determination of the breakdown field strength of plates or foils up to sample thickness of 3mm as per IEC 60243-1 was as shown in Figs.…”

Mechanical and Thermal Properties of Epoxy Composites Containing Zirconium Oxide Impregnated Halloysite Nanotubes

“…Based on this, Tcure was determined to be 170 °C for all the composite samples. A low CTE is desired to achieve dimensional stability [17]. The dimensional change curves for the epoxy composites with various amounts of the HNT and Zr/HNT fillers are shown in Figure 7.…”

Three dimensional imaging of electrical trees in micro and nano-filled epoxy resin

“…Visible light could penetrate such a thin sample and thus, trees were observed using optical microscopy. Others have sliced the sample near the needle tip and optically imaged the treeing area [7]. A different situation is encountered when imaging electrical trees in nano-filled materials.…”