scholarly journals Exploring electrical conductivity within mesoscopic phases of semiconducting poly(3,4-ethylenedioxythiophene):poly(4-styrene-sulfonate) films by broadband dielectric spectroscopy

2013 ◽  
Vol 103 (12) ◽  
pp. 123304 ◽  
Author(s):  
A. N. Papathanassiou ◽  
I. Sakellis ◽  
J. Grammatikakis ◽  
E. Vitoratos ◽  
S. Sakkopoulos
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Spectroscopy ◽  
Styrene Sulfonate ◽  
Broadband Dielectric Spectroscopy

scholarly journals Broadband dielectric spectroscopy for monitoring temperature-dependent chloride ion motion in BiOCl plates

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Adrian Radoń ◽  
Dariusz Łukowiec ◽  
Patryk Włodarczyk
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Spectroscopy ◽  
Low Frequency ◽  
Chloride Ion ◽  
Ion Source ◽  
Chloride Ions ◽  
Ion Concentration ◽  
Broadband Dielectric Spectroscopy ◽  
Free Chloride ◽  
Structure Rebuilding

AbstractThe dielectric properties and electrical conduction mechanism of bismuth oxychloride (BiOCl) plates synthesized using chloramine-T as the chloride ion source were investigated. Thermally-activated structure rebuilding was monitored using broadband dielectric spectroscopy, which showed that the onset temperature of this process was 283 K. This rebuilding was related to the introduction of free chloride ions into [Bi2O2]2+ layers and their growth, which increased the intensity of the (101) diffraction peak. The electrical conductivity and dielectric permittivity were related to the movement of chloride ions between plates (in the low-frequency region), the interplanar motion of Cl− ions at higher frequencies, vibrations of these ions, and charge carrier hopping at frequencies above 10 kHz. The influence of the free chloride ion concentration on the electrical conductivity was also described. Structure rebuilding was associated with a lower concentration of free chloride ions, which significantly decreased the conductivity. According to the analysis, the BiOCl plate conductivity was related to the movement of Cl− ions, not electrons.

scholarly journals High AC and DC Electroconductivity of Scalable and Economic Graphite–Diamond Polylactide Nanocomposites

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2835
Author(s):  
Jacek Fal ◽  
Katarzyna Bulanda ◽  
Mariusz Oleksy ◽  
Jolanta Sobczak ◽  
Jinwen Shi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Dielectric Spectroscopy ◽  
Mass Fraction ◽  
Ash Content ◽  
Melt Blending ◽  
Broadband Dielectric Spectroscopy ◽  
Electrical Permittivity ◽  
Magnitude Improvement

Two types of graphite/diamond (GD) particles with different ash content was applied to prepare new electroconductive polylactide (PLA)-based nanocomposites. Four samples of nanocomposites for each type of GD particles with mass fraction 0.01, 0.05, 0.10, and 0.15 were prepared via an easily scalable method—melt blending. The samples were subjected to the studies of electrical properties via broadband dielectric spectroscopy. The results indicated up to eight orders of magnitude improvement in the electrical conductivity and electrical permittivity of the most loaded nanocomposites, in reference to the neat PLA. Additionally, the influence of ash content on the electrical conductivity of the nanocomposites revealed that technologically less-demanding fillers, i.e., of higher ash content, were the most beneficial in the light of nanofiller dispersibility and the final properties.

scholarly journals Breakdown Performance and Partial Discharge Development in Transformer Oil-Based Metal Carbide Nanofluids

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 269
Author(s):  
Konstantinos N. Koutras ◽  
Sokratis N. Tegopoulos ◽  
Vasilios P. Charalampakos ◽  
Apostolos Kyritsis ◽  
Ioannis F. Gonos ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Constant ◽  
Dielectric Spectroscopy ◽  
Partial Discharge ◽  
Transformer Oil ◽  
Spectroscopy Technique ◽  
Sic Nanoparticles ◽  
Base Oil ◽  
Weight Percentage ◽  
Broadband Dielectric Spectroscopy

In this work, the influence of semi-conductive SiC nanoparticles on the AC breakdown voltage and partial discharge development in natural ester oil FR3 is examined. Primarily, the dielectric constant and the electrical conductivity of the nanoparticles are measured following the broadband dielectric spectroscopy technique. The nanoparticles are added into the matrix following the ultrasonication process in three weight percentage ratios in order for their effect to be evaluated as a function of their concentration inside the base oil. The processing of the results reveals that the nanofluid containing SiC nanoparticles at 0.004% w/w demonstrates the highest AC dielectric strength improvement and shows the greatest resistance to the appearance of partial discharge activity. The mechanisms behind the aforementioned results are discussed in detail and confirmed by the broadband dielectric spectroscopy technique, which reveals that this particular nanofluid sample is characterized by lower dielectric constant and electrical conductivity than the one with double the weight percentage ratio.

Broadband dielectric spectroscopy on glycerol and CKN

1996 ◽  
Vol 176 (1) ◽  
pp. 33-41 ◽  
Author(s):  
A. Pimenov ◽  
P. Lunkenheimer ◽  
A. Loidl
Keyword(s):  
Dielectric Spectroscopy ◽  
Broadband Dielectric Spectroscopy
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