Electrical conductivity and the nature of charge carriers in glasses of the Tl2O-B2O3 system

2008 ◽  
Vol 34 (3) ◽  
pp. 227-239 ◽  
Author(s):  
I. A. Sokolov ◽  
I. V. Murin ◽  
V. D. Khripun ◽  
N. A. Valova ◽  
Yu. K. Startsev ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Charge Carriers

Composition-Dependent Electrical Conductivity of Ionic-Electronic Composite

1997 ◽  
Vol 500 ◽  
Author(s):  
M. Park ◽  
G. M. Choi
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Electromotive Force ◽  
Composition Dependence ◽  
Force Measurement ◽  
Ionic Transport ◽  
Charge Carriers ◽  
Stabilized Zirconia ◽  
Ionic Charge ◽  
Polarization Technique

ABSTRACTComposition. dependence of electrical conductivity of ionic-electronic composite was camined using yttria(8mol%) stabilized zirconia-NiO composites. The contributions of ectronic and ionic charge carriers to the electrical conductivity were determined by Hebb-Vagner polarization technique and electromotive force measurement of galvanic cell. Up to 6 sol% NiO addition, the conductivity decreased since the electronic NiO acted as an insulator in onic matrix. However the ionic transport was dominant until NiO content reaches 26 vol%. Mixed conduction was observed between 26 and 68 vol% of NiO. The effects of composition on he electrical properties were explained by the microstructure and thus by the distribution of two hases.

scholarly journals Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 336
Author(s):  
Yu Shang ◽  
Qiang Liu ◽  
Chen Mao ◽  
Sen Wang ◽  
Fan Wang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Moisture Content ◽  
Charge Carriers ◽  
Dynamics Simulation ◽  
Water Molecules ◽  
Stable Operation ◽  
Polarization Current ◽  
Depolarization Current ◽  
Moisture Condition ◽  
Dc Voltage

Cellulose insulation polymer material is widely used in oil immersed bushing. Moisture is one of the important reasons for the deterioration of cellulose polymer insulation, which seriously threatens the safe and stable operation of bushing. It is significant to study the polarization and depolarization behavior of oil-immersed cellulose polymer insulation with different moisture condition under higher voltage. Based on polarization/depolarization current method and charge difference method, the polarization/depolarization current, interfacial polarization current and electrical conductivity of cellulose polymer under different DC voltages and humidity were obtained. Based on molecular-dynamics simulation, the effect of moisture on cellulose polymer insulation was analyzed. The results show that the polarization and depolarization currents become larger with the increase in DC voltage and moisture. The higher applied voltage will accelerate the charge carrier motion. The ionization of water molecules will produce more charge carriers. Thus, high DC voltage and moisture content will increase the interface polarization current. Increased moisture content results in more charge carriers ionized by water molecules. In addition, the invasion of moisture will reduce the band width of cellulose polymer and enhance its electrostatic potential, so as to improve its overall electrical conductivity. This paper provides a reference for analyzing the polarization characteristics of charge carriers in cellulose polymer insulation.

scholarly journals Термоэлектрические свойства твердых растворов (CuInSe-=SUB=-2-=/SUB=-)-=SUB=-1-x-=/SUB=-(In-=SUB=-2-=/SUB=-Te-=SUB=-3-=/SUB=-)-=SUB=-x-=/SUB=-

2022 ◽  
Vol 56 (1) ◽  
pp. 38
Author(s):  
Ч.И. Абилов ◽  
М.Ш. Гасанова ◽  
Н.Т. Гусейнова ◽  
Э.К. Касумова
Keyword(s):  
Thermal Conductivity ◽  
Electrical Conductivity ◽  
Solid Solutions ◽  
Figure Of Merit ◽  
Charge Carriers ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Mobility Of Charge Carriers ◽  
Temperature Dependences ◽  
Thermoelectric Coefficient

The results of studying the temperature dependences of electrical conductivity, thermoelectric coefficient, Hall mobility of charge carriers, total and electronic thermal conductivity, as well as phonon thermal resistance of alloys of (CuInSe2)1-x(In2Te3)x solid solutions at x=0.005 and 0.0075 are presented. The values ​​of these parameters for certain temperatures were used to calculate the values ​​of the thermoelectric figure of merit of the indicated compositions. It turned out that as the temperature rises, the thermoelectric figure of merit tends to grow strongly, from which it can be concluded that these materials can be used in the manufacture of thermoelements.

scholarly journals Fully soluble self-doped poly(3,4-ethylenedioxythiophene) with an electrical conductivity greater than 1000 S cm−1

2019 ◽  
Vol 5 (4) ◽  
pp. eaav9492 ◽  
Author(s):  
Hirokazu Yano ◽  
Kazuki Kudo ◽  
Kazumasa Marumo ◽  
Hidenori Okuzaki
Keyword(s):  
Electrical Conductivity ◽  
Critical Parameter ◽  
Colloidal Particles ◽  
Average Distance ◽  
Charge Carriers ◽  
High Electrical Conductivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Force ◽  
Technical Issues

Wet-processable and highly conductive polymers are promising candidates for key materials in organic electronics. Poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is commercially available as a water dispersion of colloidal particles but has some technical issues with PSS. Here, we developed a novel fully soluble self-doped PEDOT (S-PEDOT) with an electrical conductivity as high as 1089 S cm−1without additives (solvent effect). Our results indicate that the molecular weight of S-PEDOT is the critical parameter for increasing the number of nanocrystals, corresponding to the S-PEDOT crystallites evaluated by x-ray diffraction and conductive atomic force microscopic analyses as having high electrical conductivity, which reduced both the average distance between adjacent nanocrystals and the activation energy for the hopping of charge carriers, leading to the highest bulk conductivity.

scholarly journals Highly Conductive Ceramics with Multiple Types of Mobile Charge Carriers

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1148
Author(s):  
Sebastian Wachowski ◽  
Gilles Gauthier ◽  
Jong-Sook Lee ◽  
Sandrine Ricote
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Physical Properties ◽  
Ferroelectric Properties ◽  
Ceramic Materials ◽  
Charge Carriers ◽  
Mobile Charge ◽  
Conductive Ceramics ◽  
Functional Ceramic

Functional ceramic materials are of interest in many applications due to their structural and chemical richness and the huge range of physical properties that can be generated and modified by the control of the former (electrical conductivity, thermo-mechanical properties, dielectric, piezoelectric, ferroelectric properties, etc [...]

Die elektrische Leitfähigkeit hydratisierter Sulfate zwei- und dreiwertiger Kationen.

1976 ◽  
Vol 31 (10) ◽  
pp. 1313-1316
Author(s):  
Heinz P. Fritz ◽  
Dagmar Laschka
Keyword(s):  
Electrical Conductivity ◽  
Hydrogen Bonds ◽  
Proton Conductivity ◽  
Activation Energies ◽  
Charge Carriers ◽  
Elektrische Leitfähigkeit

The electrical conductivity of polycrystalline pellets of ZnSO4 · 7 H2O, MgSO4 · 7 H2O, CuSO4 · 5 H2O, KAl(SO4)2 · 12 H2O, NH4Al(SO4)2 · 12 H2O and KCr(SO4)2 · 12 H2O was measured. By coulometry the role of protons as charge carriers was determined. A correlation is given between the strength of hydrogen bonds and the activation energies for the proton conductivity.

Excess conductivity and the pseudogap state in Hf-doped YBa2Cu3O7−δ ceramics

2016 ◽  
Vol 30 (04) ◽  
pp. 1650034 ◽  
Author(s):  
S. V. Savich ◽  
A. V. Samoilov ◽  
R. V. Vovk ◽  
O. V. Dobrovolskiy ◽  
S. N. Kamchatna ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Temperature Dependence ◽  
Charge Carriers ◽  
Excess Conductivity ◽  
Broad Temperature Range ◽  
Pseudogap State ◽  
Temperature Range ◽  
Scattering Centers ◽  
Exponential Temperature Dependence

The electrical conductivity of hafnium (Hf)-doped YBa2Cu3O[Formula: see text] ceramics is investigated. Hf doping has been revealed to lead to an increase of the number of effective scattering centers for the normal charge carriers. In a broad temperature range, the excess conductivity of the investigated samples obeys an exponential temperature dependence, while near [Formula: see text] it is satisfactorily described by the Aslamazov–Larkin model. Meanwhile, Hf doping has been shown to lead to a notable broadening of the temperature range for the manifestation of the pseudogap anomaly in the [Formula: see text]-plane.

Effect of HCl Concentration and Acetone Washing on the Dielectric and Conduction Properties of Polyaniline Salts

2021 ◽  
Vol 14 ◽  
Author(s):  
Jayashree Mohanty ◽  
S.R. Mishra ◽  
Tanmaya Badapanda ◽  
S. Anwar
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Acid Concentration ◽  
Charge Carriers ◽  
Short Chain ◽  
Water Medium ◽  
Distilled Water ◽  
Chain Polymer ◽  
Pani Salt ◽  
Long Chain

Aims: The aim of the work is to study the effect of acid concentration and acetone washing on electrical properties of Polyaniline (PANI) salts prepared through chemically oxidative polymerization. Background: The frequency dependent conductivity and dielectric permittivity provide important information on the electrical properties of conducting polymers which gives information regarding their utility in electronic applications. Objective: Hence, the present study is based on the comparative the electrical properties study (dielectric and electrical conductivity) of PANI salts prepared in two different media like water and 1M HCl along with study regarding effect acetone washing on the said electrical properties of the polymer samples. Methods: PANI salts are synthesized through chemical oxidative polymerisation of aniline hydrochloride with the oxidant ammonium persulphate in two different media like water and 1M HCl. One part of the PANI salt samples were washed with distilled water after synthesis and another part of the polymer samples were washed with distilled water followed by acetone to study the effect of acetone washing on the electrical properties of polymer samples. Results: Non-acetone washed PANI salt prepared in water medium shows the highest dielectric as well as electrical conductivity due to the increased charge carriers provided both by long chain polymer as well as short chain oligomers. When the acid concentration is increased to 1M there may be loss of protons accompanied by pairing of free radicals to form quinoimine units that leads to the loss of charge carriers consequently decreasing the dielectric constant and electrical conductivity. Conclusion : PANI salt prepared in water shows the highest dielectric as well as conductivity due to the increased charge carriers provided both by long chain polymer as well as short chain oligomers.

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