Journal ArticleDOI
Dielectric permittivity and loss of an aluminum-filled epoxy resin
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TLDR
In this paper, the dielectric behavior of an epoxy resin filled with 0-30 wt% aluminum powder is reported. But the results are limited to the case when the filler is filled with an interfacial or Maxwell-Wagner-Sillars polarization effect.Abstract:
Dielectric behaviour of an epoxy resin filled with 0–30 wt% aluminum powder is reported. Permittivity, loss index and dissipation factor are characterized as a function of temperature in the range 20–150°C and frequency in the range 20 Hz–20 kHz. The filled resin shows a higher permittivity and higher dielectric loss. An interfacial or Maxwell-Wagner-Sillars polarization effect is clearly evident and glass transition temperature is unaffected by the filler.read more
Citations
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Journal ArticleDOI
Electric modulus and interfacial polarization in composite polymeric systems
TL;DR: In this paper, the applicability of the electric modulus formalism is investigated on a Debye type relaxation process, the interfacial polarization or Maxwell-Wagner-Sillars effect.
Journal ArticleDOI
Dielectric dispersion and ac conductivity in—Iron particles loaded—polymer composites
TL;DR: In this paper, an epoxy resin matrix with randomly dispersed iron micro-particles in various amounts were prepared and their dielectric spectra were measured in the frequency range 5 Hz −13 MHz and temperature interval from ambient to 140 °C.
Journal ArticleDOI
Hopping conductivity in polymer matrix–metal particles composites
TL;DR: In this paper, the authors investigated the temperature and frequency dependence of conductivity of polymer matrix-metal particles composites and provided evidence for the charge carriers transport mechanism via the occurred agreement of experimental results with the employed hopping models (variable range hopping model and random free energy barrier model).
Journal ArticleDOI
Electrical relaxations in polymeric particulate composites of epoxy resin and metal particles
TL;DR: In this article, two relaxation processes are revealed in the frequency range and temperature interval of the measurements, one is an interfacial dielectric relaxation (Maxwell-Wagner-Sillars), MWS and the other is a conductivity relaxation.
Journal ArticleDOI
Dielectric properties of polystyrene–aluminum-nitride composites
Suzhu Yu,Peter Hing,Xiao Hu +2 more
TL;DR: In this article, a composite of aluminum-nitride (AlN) particles dispersed around polystyrene matrix particles has been synthesized in order to improve the thermal properties of the polymer at the low-filler content with a minimal increase in the dielectric constant.
References
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Book
Dielectric Materials and Applications
TL;DR: Theory of dielectric measuring techniques and their applications as mentioned in this paper Theoretical and practical applications of die-lectric materials include: insulation strength of high pressure gases and of vacuum liquid dielectrics plastics as dielectors ceramics dielectrices in equipment, capacitors in capacitors rubber and plastics in cables problems of the cable engineer, and the requirements of the armed forces.
Book
Electrical properties of polymers
TL;DR: In this paper, the authors present applications of electro-active and conductive polymers in static fields and static charges, including Ionic conduction, particulate and molecular composites.
Book
Principles of dielectrics
TL;DR: In this article, the relative permittivity of dielectrics in static and time-dependent fields is calculated for the case of static dielectric saturation in dipolar liquids.
Journal ArticleDOI
Generalized combining rules for predicting transport properties of composite materials
TL;DR: In this article, a general relationship is presented to predict the effective transport properties of composite materials in terms of the properties and concentration of the components and the internal microstructure of the composite materials.
Patent
Composite polymeric materials
Gerd M. Lenke,Donald R. Wiff +1 more
TL;DR: In this paper, the rigid rod polymer is formed from a solution of its precursor(s) in a liquid precursor of the matrix polymer eg molten caprolactam, and a particularly intimate blend of the polymeric structure is achieved by forming the rigid rods polymer in situ.