Studying of dielectric spectra of YCu0.15Mn0.85O3 solid solution with the use of complex conductivity

This work presents the results of studying the electrophysical properties of the YCu[Formula: see text]Mn[Formula: see text]O3 solid solution in the range of temperatures of [Formula: see text] = 26–400[Formula: see text]C and frequency range of [Formula: see text] = 102–105 Hz. A model description of the revealed dispersion of dielectric parameters in the material is made. The nonclassical modified Havriliak–Negami model written for complex electrical conductivity was used as an approximation model. It is shown that the application of this model almost exactly describes the frequency behavior of the dielectric constant [Formula: see text]/[Formula: see text], the dielectric loss tangent tg[Formula: see text] as well as the real and imaginary parts of complex conductivity [Formula: see text] and [Formula: see text]. The results of this work are an important step in identifying the opportunities and understanding the applications of this model.

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Preparation and electrical conductivity of (Cu0.5Ag0.5)7SiS5I-based superionic ceramics

10.21203/rs.3.rs-34102/v1 ◽

2020 ◽

Author(s):

Ihor Studenyak ◽

Artem POGODIN ◽

Iryna SHENDER ◽

Serhiy BEREZNYUK ◽

Mykhailo FILEP ◽

...

Keyword(s):

Solid Solution ◽

Electrical Conductivity ◽

Electronic Conductivity ◽

Microstructural Analysis ◽

Structural Studies ◽

Frequency Range ◽

Electronic Components ◽

Total Electrical Conductivity ◽

Ceramic Samples ◽

Average Size

Abstract The ceramics based on (Cu0.5Ag0.5)7SiS5I solid solution of superionic conductor with argyrodite structure were prepared by using the powders with different particles size. The structural studies of powders were performed by XRD technique, while the ceramic samples with different average size of the crystallites were investigated by microstructural analysis. The total electrical conductivity of ceramic samples was measured by impedance spectroscopy in the frequency range from 10 Hz to 2×106 Hz and temperature interval from 292 K to 383 K. The contributions of ionic and electronic components into the total electrical conductivity were separated as well as their temperature behavior was studied. The dependences of ionic and electronic conductivity and their activation energies on average size of the crystallites in (Cu0.5Ag0.5)7SiS5I-based ceramic samples were investigated.

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Structure and Electrical Properties of Superionic Ceramics Based on Silver-Enriched (Cu0.25Ag0.75)7SiS5I Solid Solution

Ukrainian Journal of Physics ◽

10.15407/ujpe66.6.489 ◽

2021 ◽

Vol 66 (6) ◽

pp. 489

Author(s):

A.I. Pogodin ◽

I.O. Shender ◽

S.M. Bereznyuk ◽

M.Y. Filep ◽

O.P. Kokhan ◽

...

Keyword(s):

Solid Solution ◽

Electrical Conductivity ◽

Microstructural Analysis ◽

Structural Studies ◽

Frequency Range ◽

Impedance Measurements ◽

Total Electrical Conductivity ◽

Ceramic Samples ◽

Electronic Conductivities ◽

Temperature Dependences

(Cu0.25Ag0.75)7SiS5I-based superionic ceramics were fabricated by using the micro- and nanopowders. The XRD technique and microstructural analysis are applied for the structural studies of powders and ceramic samples. The impedance measurements of ceramic samples are carried out in the frequency range from 10Hz to 2 × 106 Hz and temperature interval from 292 K to 383 K. The contributions of ionic and electronic conductivities into the total electrical conductivity are determined, and their temperature dependences are investigated. The influence of the size effect on ionic and electronic conductivities and their activation energies in (Cu0.25Ag0.75)7SiS5I-based ceramics is studied.

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Electrophysical properties of composites based on low density polyethylene and zeolite mineral

Perspektivnye Materialy ◽

10.30791/1028-978x-2020-8-65-72 ◽

2020 ◽

pp. 65-72

Author(s):

A. M. Maharramov ◽

◽

V. J. Dzhafarov ◽

M. N. Bayramov ◽

N. Sh. Aliyev ◽

...

Keyword(s):

Electrical Conductivity ◽

Natural Zeolite ◽

Filler Content ◽

Charge Carriers ◽

Electrophysical Properties ◽

Dielectric Parameters ◽

Ice Water ◽

Frequency Dependences ◽

Electrophysical Parameters ◽

Properties Of Composites

Dielectric parameters (ε′, tgδ) and electrical conductivity (σ) of samples composites of 60 vol. % LDPE/40 vol. % zeolite, 40 vol. % LDPE/60 vol. % zeolite was measured at frequencies 25 – 106 Hz and a temperature range 293 – 403 K. Composites based on a homogeneous mixture of LDPE with powdered natural zeolite (clinoptiolite and heilandite — Agdag deposit, Azerbaijan) were obtained in the form of film samples 140 – 200 microns and 20 mm in diameter, by hot pressing at a temperature of 403 – 413 K and a pressure of 15 MPa, followed by quenching in a mixture of ice-water. The temperature dependence of the electrophysical parameters of the samples of the composites revealed that the dielectric loss tgδ and electrical conductivity σ increase with increasing filler content, and this is due to an increase in the concentration of charge carriers and their mobility. The study of the frequency dependences ε′ = ƒ(logν), tgδ = ƒ(logν) and logσ = ƒ(logν) showed the presence of two linear regions of the frequency dependences of the electrical conductivity, which vary according to the law σас (ν) ∼ ν0,73, and this is more consistent with the hopping mechanism of the electrical conductivity of LDPE/zeolite composites.

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Complex electrical conductivity of KTB samples in the frequency range between 0.001 and 10000Hz - first results

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts ◽

10.1016/0148-9062(92)90633-b ◽

1992 ◽

Vol 29 (4) ◽

pp. 219

Keyword(s):

Electrical Conductivity ◽

Frequency Range ◽

First Results ◽

Complex Electrical Conductivity

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Electrical Conductivity and Dielectric Properties of Bulk Glass V2O5 (ZnO, PbO) SrO FeO

Physics Research International ◽

10.1155/2011/583420 ◽

2011 ◽

Vol 2011 ◽

pp. 1-10 ◽

Cited By ~ 7

Author(s):

M. S. Aziz ◽

A. G. Mostafa ◽

A. M. Youssef ◽

S. M. S. Youssif

Keyword(s):

Activation Energy ◽

Electrical Conductivity ◽

Dielectric Constant ◽

Dielectric Properties ◽

Dielectric Loss ◽

Dielectric Dispersion ◽

Bulk Glass ◽

Frequency Range ◽

Glassy System ◽

Dielectric Parameters

The AC conductivity and dielectric parameters of the glassy system of (70-x) V2O5· x(Zn/Pb)· 10SrO · 20FeO (x = 0, 5, 10, and 15) glasses have been investigated. The frequency and temperature dependence of dielectric constant (ε′) and dielectric loss (ε′′) is studied in the frequency range 100 Hz–5 MHz and in the temperature range 300–460 K. Dielectric dispersion is observed in all samples as Zn/Pb increase content in the (70-x)V2O5· x(Zn/Pb)·10SrO·20FeO systems. These results are explained on the basis of a Debye-type relaxation. It is also observed that the activation energy increases on increasing the Zn/Pb contents in this system.

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Complex dielectric permittivity, electric modulus and electrical conductivity analysis of Au/Si3N4/p-GaAs (MOS) capacitor

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-021-05349-z ◽

2021 ◽

Author(s):

Sema Türkay ◽

Adem Tataroğlu

Keyword(s):

Electrical Conductivity ◽

Dielectric Permittivity ◽

Electric Modulus ◽

Arrhenius Equation ◽

Rf Magnetron Sputtering ◽

Oxide Semiconductor ◽

Complex Dielectric Permittivity ◽

Mos Capacitor ◽

Universal Power Law ◽

Complex Electrical Conductivity

AbstractRF magnetron sputtering was used to grow silicon nitride (Si3N4) thin film on GaAs substrate to form metal–oxide–semiconductor (MOS) capacitor. Complex dielectric permittivity (ε*), complex electric modulus (M*) and complex electrical conductivity (σ*) of the prepared Au/Si3N4/p-GaAs (MOS) capacitor were studied in detail. These parameters were calculated using admittance measurements performed in the range of 150 K-350 K and 50 kHz-1 MHz. It is found that the dielectric constant (ε′) and dielectric loss (ε″) value decrease with increasing frequency. However, as the temperature increases, the ε′ and ε″ increased. Ac conductivity (σac) was increased with increasing both temperature and frequency. The activation energy (Ea) was determined by Arrhenius equation. Besides, the frequency dependence of σac was analyzed by Jonscher’s universal power law (σac = Aωs). Thus, the value of the frequency exponent (s) were determined.

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Effect of Heat Treatment on Microstructure and Properties of Cu-3Ti-1Al Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.749.282 ◽

2013 ◽

Vol 749 ◽

pp. 282-286

Author(s):

Xian Hui Wang ◽

Xiao Chun Sun ◽

Xiao Hong Yang ◽

Shu Hua Liang

Keyword(s):

Heat Treatment ◽

Solid Solution ◽

Electrical Conductivity ◽

Electron Microscope ◽

Treatment Process ◽

Intermetallic Phase ◽

Strengthening Effect ◽

Microstructure And Properties ◽

Optimal Heat Treatment ◽

Transmission Electron

The effect of heat treatment on the microstructure and properties of Cu-3Ti-1Al alloy was investigated. The microstructure was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM), and the hardness and electrical conductivity were tested as well. The results showed that the hardness and electrical conductivity of Cu-3Ti-1Al alloy increased significantly after solid solution and ageing treatment. The strengthening effect of Cu-3Ti-1Al alloy was attributed to the formation of intermetallic phase such as Ti3Al and fine precipitates of coherent β-Cu4Ti. With increase of the aging time and the temperature, the precipitates became coarse and incoherent with Cu matrix, and the discontinuous precipitate β started to grow from grain boundaries toward grain interior, which decreased hardness. As the formation of Ti3Al, β-Cu3Ti and β-Cu4Ti phase can efficiently reduce Ti concentration in Cu matrix. The electrical conductivity of Cu-3Ti-1Al alloy increases. In the range of experiments, the optimal heat treatment process for Cu-3Ti-1Al alloy is solid solution at 850°C for 4h and ageing 500°C for 2h, and the hardness and electrical conductivity are 227HV and 12.3%IACS, respectively.

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