Results 31 to 40 of about 221,077 (342)

Dielectric and Thermal Properties of Carrot Fibers –Epoxy Composites [PDF]

open access: yesEngineering and Technology Journal, 2011
Epoxy composites were prepared with two sizes of carrot fibers in different weight percent (10%, 20%, 30% and 40%) by hand lay-up technique. The dielectric constant and dissipation factor (tanä) of pure epoxy resin and composites were measured in a ...
Wafaa A. Hussain
doaj   +1 more source

Characteristics of Gel Time and Dielectric Strength of Epoxy Composite According to the Mixing Ratio of Micro-Fillers

open access: yesEnergies, 2020
The dielectric strength and gel time of epoxy composites vary with the mixing ratio of epoxy resin, hardener, additives, filler, etc., and especially the gel time affects the productivity and economics of ultra-high-voltage (UHV) equipment.
Dong-Hun Oh   +5 more
doaj   +1 more source

Influence of Space Charge on Dielectric Property and Breakdown Strength of Polypropylene Dielectrics under Strong Electric Field

open access: yesEnergies, 2022
Space charge accumulation in polypropylene (PP) affect the dielectric properties and breakdown strength of the material. The pre-injected charge in PP under the action of different polarity voltage is quantitatively characterized, and the effects of the ...
Zhaoliang Xing   +6 more
doaj   +1 more source

Local dielectric spectroscopy of near-surface glassy polymer dynamics

open access: yes, 2007
A non-contact scanning-probe-microscopy method was used to probe local near-surface dielectric susceptibility and dielectric relaxation in poly-vinyl-acetate (PVAc) near the glass transition.
Crider, P. S.   +4 more
core   +1 more source

Dielectric Breakdown of a Mott Insulator

open access: yes, 2012
We study the nonequilibrium steady state of a Mott insulator coupled to a thermostat and driven by a constant electric field, starting from weak fields, until the dielectric breakdown, and beyond.
Camille Aron, J. M. Ziman
core   +1 more source

Relaxor behavior and morphotropic phase boundary in a simple model

open access: yes, 2013
A simple model to reproduce strong enhancement of dielectric response near the morphotropic phase boundary (MPB) is proposed. This model consists of long-range dipole-dipole interaction and compositional chemical disorder incorporated by the variation in
Kato, Takeo, Tomita, Yusuke
core   +1 more source

Synthesize Nano ZnO-ZrO2 Composite by Combustion Method and Studying their Dielectric Properties [PDF]

open access: yesEngineering and Technology Journal, 2012
Combustion method had been used to prepare a composite material from doping ZnO by 10 mol% ZrO2 . XRD showed a good crystalline powder comparing with ASTM cards.
Fadhil A.Chyad
doaj   +1 more source

Theory of ac electrokinetic behavior of spheroidal cell suspensions with an intrinsic dispersion

open access: yes, 2005
The dielectric dispersion, dielectrophoretic (DEP) and electrorotational (ER) spectra of spheroidal biological cell suspensions with an intrinsic dispersion in the constituent dielectric constants are investigated. By means of the spectral representation
D.J. Bergman   +27 more
core   +1 more source

Some Factors Effecting on the Dielectric Strength for (PVC- Kaolin) Composites [PDF]

open access: yesEngineering and Technology Journal, 2011
This research includes the effect of kaolin additions to the polymer matrix (PVC) and study some factors affecting to dielectric strength. The kaolin powder was added as percentage by weight (1,2,3 and 4%) to PVC, and the specimens formed by hot pressing
doaj   +1 more source

Effects of Hot Pressing Temperature and Pressure on Dielectric Properties of Aramid Insulating Paper

open access: yesEnergies, 2022
The hot pressing parameters and fiber ratio have an important influence on the dielectric properties of aramid insulating paper. In order to deeply explore its influence and the mechanism behind it, aramid insulating papers were made with different hot ...
Yuanxin Yao   +5 more
doaj   +1 more source

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