Effects of Fillers on Electrical Properties of PTFE Composites for Circuit Breaker

2007 ◽  
Vol 539-543 ◽  
pp. 1038-1042 ◽  
Author(s):  
Hoy Yul Park ◽  
Dong Pil Kang ◽  
Myeong Sang Ahn ◽  
Hee Woong Lee ◽  
Seog Young Yoon ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Electrical Resistivity ◽  
Electrical Properties ◽  
Circuit Breaker ◽  
Dielectric Strength ◽  
Dissipation Factor ◽  
Ptfe Composites ◽  
Corona Resistance

This paper presents the effects of fillers on electrical properties of PTFE composites for nozzle of circuit breaker. PTFE has been used widely as a material for circuit breaker nozzle. Adding some filler into PTFE material is expected to be efficient for improving the endurance against arc radiation. In this experiment, effects of fillers on electrical properties such as dielectric constant, dissipation factor, electrical resistivity, dielectric strength and corona resistance of PTFE composites were investigated.

Electrical Properties of BaTiO3 Doped with Lanthana and Niobia

2007 ◽  
Vol 280-283 ◽  
pp. 357-360
Author(s):  
M.M. Mosaad ◽  
M.I. Abd El-Ati ◽  
S.A. Olofa ◽  
A. Ismal
Keyword(s):  
Dielectric Constant ◽  
Electrical Resistivity ◽  
Electrical Properties ◽  
Dielectric Loss ◽  
Temperature Range ◽  
Constant E

The electrical resistivity (r), the dielectric constant (e), and the dielectric loss (tan d) were accurately measured in the temperature range 60-200oC for the samples (BaTiO3-La2O3-Nb2O5) with (Nb2O5 = 0.1) wt% and La2O3 = 0.0, 0.1, 0.2, 0.3 and 0.4). It is found that the addition of La content cause increase in resistivity and decrease the dielectric constant.

Effects of Fillers on Electrical Properties of PTFE Composites for Circuit Breaker

2007 ◽  
pp. 1038-1042
Author(s):  
Hoy Yul Park ◽  
Dong Pil Kang ◽  
Myeong Sang Ahn ◽  
Hee Woong Lee ◽  
Seog Young Yoon ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Circuit Breaker ◽  
Ptfe Composites

Dielectric Properties of Importance in Operations of Post-harvest of Sorghum

2017 ◽  
Vol 13 (4) ◽  
Author(s):  
Caciano P. Z. Noreña ◽  
Carlos E. Lescano-Anadón
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Electrical Properties ◽  
Dielectric Loss ◽  
Moisture Content ◽  
Loss Factor ◽  
Dissipation Factor ◽  
Post Harvest ◽  
Moisture Contents ◽  
And Storage

Abstract The knowledge of electrical properties and their relationship with moisture content is of great importance in operations of post-harvest and storage in grains. The dielectric properties of sorghum samples were studied at different moisture contents and temperatures (25 at 41 °C), at frequencies of 1 and 10 kHz. In order to measure changes in the capacitance and dissipation factor of the samples, the method of impedance bridge was used. Both the dielectric constant and the dielectric loss factor of the samples increased with increasing moisture content and temperature; however, they decreased with increasing frequency. Models were proposed to relate the dielectric properties to either the moisture (exponential and polynomial) or temperature (linear).

scholarly journals Study on electrical property relaxations of 10 MeV electron beam irradiated HDPE

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Farhood Ziaie ◽  
M. Borhani ◽  
A. Majdabadi ◽  
Z. Kazemi
Keyword(s):  
Dielectric Constant ◽  
Electron Beam ◽  
Room Temperature ◽  
Charge Trapping ◽  
Life Time ◽  
Dielectric Strength ◽  
Dissipation Factor ◽  
High Energy ◽  
Cross Linking ◽  
High Energy Electron

Abstract Cross linking of the HDPE was performed with high energy electron beam. EPR spectroscopy was used to study the life time of unpaired electron in the irradiated samples. Dielectric constant and dielectric strength almost remained unchanged but, volume resistively and dissipation factor increased and decreased respectively, after irradiation. The results shows that the dissipation factor is going to be recovered slowly with the storing time at room temperature. It is believed that variation of some electrical properties during time after irradiation are due to the effects of free radical and charge trapping remained in the bulk of material.

scholarly journals Factors that affects the dielectric properties of natural fibre reinforced hybrid biocomposite

2019 ◽  
Vol 15 (2) ◽  
pp. 714
Author(s):  
Nishanthi Sunthrasakaran ◽  
Nor Akmal Mohd Jamail ◽  
Rahisham Abd. Rahman ◽  
Md Nor Ramdon Bin Baharom ◽  
Qamarul Ezani Kamarudin ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Electrical Properties ◽  
Loss Factor ◽  
Moisture Absorption ◽  
Dissipation Factor ◽  
Alkaline Treatment ◽  
Natural Fibre ◽  
Fibre Content ◽  
Almost All ◽  
Hybrid Biocomposite

<span>Almost all research on natural fibre reinforced composite has focused on the mechanical properties of the composite. Drawing on the important factors that effect the end product of composite, this paper reviews electrical properties of hybrid biocomposite when fibre content and surface treatment is varied. The compilation of dielectric constant, dissipation factor, loss factor and moisture absorption reported by researchers has been presented in this paper. The intrinsic characteristic of natural fibre which is hydrophilic is the main drawback that affects the electrical properties of the composite. Alkaline treatment on natural fibre has proven to overcome the hydrophilic characteristic and improves the adhesion between matrix and fibre. Besides that, the percentage of fibre content plays an important role in producing a good natural fibre reinforced hybrid composite. The moisture uptake, dielectric constant, dissipation factor and loss factor of the composite decreases with decreased fibre content.</span>

scholarly journals Development of a dielectric ceramic based on diatomite-titania part two: dielectric properties characterization

Cerâmica ◽  
1998 ◽  
Vol 44 (287-288) ◽  
pp. 136-140
Author(s):  
Jamilson Pinto Medeiros ◽  
Elcio Correia de Souza Tavares ◽  
Uilame Umbelino Gomes ◽  
Wilson Acchar
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Temperature Coefficient ◽  
Sintering Temperature ◽  
Dielectric Strength ◽  
Dissipation Factor ◽  
Insulation Resistance ◽  
Dielectric Ceramic ◽  
Dc Voltage ◽  
Titania Content

Dielectric properties of sintered diatomite-titania ceramics are presented. Specific capacitance, dissipation factor, quality factor and dielectric constant were determined as a function of sintering temperature, titania content and frequency; the temperature coefficient of capacitance was measured as a function of frequency. Besides leakage current, the dependence of the insulation resistance and the dielectric strength on the applied dc voltage were studied. The results show that diatomite-titania compositions can be used as an alternative dielectric.

Electrical Behavior of Probertite by Dielectric Spectroscopy

2014 ◽  
Vol 33 (6) ◽  
pp. 545-552 ◽  
Author(s):  
M. Okutan ◽  
Z. Yalçın ◽  
O. İçelli ◽  
F. Ay ◽  
R. Boncukçuoğlu ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Electrical Properties ◽  
Temperature Dependence ◽  
Imaginary Part ◽  
Dielectric Spectroscopy ◽  
Dissipation Factor ◽  
Dielectric Parameter ◽  
Electrical Behavior ◽  
Electrical Parameters ◽  
Electromagnetic Absorption

AbstractIn this work of the material investigation, electrical parameters, which are real part and imaginary part of modulus, dielectric constant, dissipation factor, and conductivity, in the bulk pellet of probertite sample is presented. Electrical properties were investigated via temperature and frequency dependent dielectric spectroscopy. Real and imaginary part of dielectric parameter properties of the probertite were measured at frequencies from 100 to 15M Hz in the temperature range of 25 to 150 °C. Temperature dependence of the real part of the dielectric constant suggests that these compounds exhibit strong electromagnetic absorption and broadband electrical behavior.

scholarly journals Investigation on Dielectric Properties of Press Board Coated with Epoxy Resin, Quartz, and Rice Husk Ash

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Banumathi S. ◽  
Karthik T. S. ◽  
Sasireka M. ◽  
Kiran Ramaswamy ◽  
Vishnu J. ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Epoxy Resin ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Volume Resistivity ◽  
Dielectric Strength ◽  
Dissipation Factor ◽  
Quartz Powder ◽  
The Press

Epoxy resin mixed with rice husk ash and quartz powder increases its dielectric strength. This paper presents the dielectric properties of the press board coated with this epoxy mixture. In this work, the press board, which is used in the transformer, is coated with three components: epoxy resin, rice husk ash, and quartz powder. The nanometer-sized quartz powder and rice husk ash are mixed in the particular ratio with the epoxy resin. The mixture of epoxy resin, quartz powder, and rice husk ash is coated on both sides of the press board. The dielectric constant, volume resistivity, and Tan Delta (dissipation factor) of the coated press board are compared with the noncoated press board. The results reveal that the coated board is having high dielectric constant and volume resistivity when compared to the noncoated board.

scholarly journals STUDY OF EFFECT Al2O3 NANOPARTICLES ON ELECTRICAL PROPERTIES OF EPOXY REINFORCEMENT BY CARBON FIBERS HYBRID COMPOSITES

2019 ◽  
Vol 7 (9) ◽  
pp. 395-401
Author(s):  
W. Y. Khdair ◽  
S. A. Salman ◽  
Z. T. Khdair
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Electrical Properties ◽  
Carbon Fibers ◽  
Hybrid Composites ◽  
Dissipation Factor ◽  
Alumina Nanoparticles ◽  
Al2o3 Nanoparticles ◽  
Volume Fractions ◽  
Composite Samples

In this paper was investigation the electrical properties of the epoxy "Hybrid Composites" as a function of a frequency. The composites constituents were epoxy using a matrix with reinforcement ratio (1:3) and volume fractions as (25% wt). The "Hybrid  Composite" samples  were prepared by addition alumina  nanoparticles on the epoxy composites reinforced by carbon  fibers with different  volume fractions (0.1,0.3,0.5,0.7)w%  by "Hand Lay-Up Molding". The experiments were performed to measure the electrical properties "Dielectric Constant, Dissipation Factor and Electrical Conductivity" in frequency range (10Hz-1MHz). The study showed that  the reinforcement process resulted in an increase in the dielectric constant values of all manufactured models, and the addition of alumina nanoparticles leads to a decrease in the values of both the dielectric constant and the dielectric loss factor with increasing frequency and for all samples and for all values listed. Alternating electrical conductivity values increase significantly with increasing frequency and for all samples when alumina nanoparticles are added.

Preparation and properties of PbO–MgO–Nb2O5 ceramics near the Pb(Mg⅓Nb⅔)O3 composition

1989 ◽  
Vol 4 (4) ◽  
pp. 930-944 ◽  
Author(s):  
M. F. Yan ◽  
H. C. Ling ◽  
W. W. Rhodes
Keyword(s):  
Dielectric Constant ◽  
Electrical Resistivity ◽  
Single Phase ◽  
Dopant Concentration ◽  
Stoichiometric Composition ◽  
Dissipation Factor ◽  
Sintering Behavior ◽  
Second Phase ◽  
Simple Method ◽  
High Electrical Resistivity

We prepared and characterized PbO–MgO–Nb2O5 ceramics near the Pb(Mg⅓Nb⅔)O3 stoichiometric composition. We examined microstructures, sintering behavior, and phase compositions in this system and prepared several new compositions, which have a single phase perovskite structure and a high dielectric constant (28000), by low sintering temperature (950–1020 °C). These compositions have a high electrical resistivity (1013 ohm-cm), which is about 1000 times higher than those of Pb(Fe½Nb½)O3 and Pb(Fe⅔W⅓)O3 based ceramics. The new compositions can be readily prepared into a single phase perovskite without a detectable amount of pyrochlore second phase by a simple method of mixing and calcining the constituent oxide and carbonate powders. Our dielectric measurements and XRD data establish the correlation between the decrease in dielectric constant and the presence of pyrochlore second phase. The effects of PbTiO3 dopant were quantitatively measured and our data showed that at a low (10 mole %) PbTiO3 concentration, the Curie temperature increases 6.6 °C for every mole % PbTiO3 dopant in the new compositions. The dielectric constant increases from 18000 in the undoped composition to 27 100 and 29000 by a PbTiO3 dopant concentration of 5% and 10%, respectively. The maximum dissipation factor also decreases from 0.10 in the undoped composition to 0.055 in the 10% PbTiO3 doped composition. The electrical resistivity, ρ, decreases with the PbTiO3 dopant concentration, t, following the ρ = ρ0 exp (–t/t0) relation where ρ0 ≍ (9.6 ± 0.2) × 1012 Ωcm and t0 ≃ 0.044.

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