Modeling of Dielectric Relaxation in Clays at Negative and Positive Temperatures

Repin, A. V.; Родионова, О. В.; Kroshka, E. S.

doi:10.1007/s11182-021-02301-w

Cited by 4 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At low temperatures (24-30 o C), the intensity of the peaks where significantly low which indicate less adjustment between the frequency of applied field and the slow motion of the new charge carriers. Due to the steric effect of the intercalated organic molecule which somehow blocks the charge carrier movements, low temperatures could not provide enough energy to rotate or change the conformation of new organic substitution within bentonite layers to allow the charge carriers to have more freedom of motion [21]. However, at higher temperatures 40-60 o C, the intensities are noticeably higher due to higher energies provided by increasing the temperature and enough energy for rotating the organic conformation as well as reducing the constriction of charge carriers.…”

Section: Dielectric Permittivitymentioning

confidence: 99%

“…Bore et al [24] used a high frequency dielectric relaxation spectroscopy to estimate the interfacial water molecules on the clay interlayers, whereas belyaeva et al [22] studied the saline soils by monitoring the complex dielectric permittivity at frequency 10 KHz to 8 GHz. Repin et al [21] proposed a modeling approach to calculate the dielectric relaxation of different clay mentals at various temperatures. The aim of this study is to investigate the effect of intercalating organic species, particularly Schiff base derivative, within the layer of montmorillonite clay minerals on the electrical and dielectric properties of the formed composite, as well as to estimate the activation energy of charge carriers and the relaxation time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Untitled

2022

J. Med. Chem. Sci.

View full text Add to dashboard Cite

In this work, the dielectric properties of intercalated 1-(4-nitrophenyl)-N-(ptolyl) methanimine into bentonite interlayers were investigated in the frequency range 10 2 to 10 6 Hz at five different temperatures between 24 o C and 60 o C. The impedance of the composite decreased with increasing the temperature from 24 o C to 60 o C, as it drops 7*10 3 Ω at 100 Hz and 1.5*10 3 Ω at 1 MHz. The composite showed a very low conductivity with little effect of increasing temperature in the low frequencies, yet the high frequencies make the effect of maximizing the temperature more obvious. The imaginary dielectric permittivity exhibited peaks of energy losses which reached the highest magnitude with 60 o C, whereas the dielectric breakdowns were shifted toward higher frequencies with increasing temperature. Moreover, the activation energy of relaxation time was obtained by using Arrhenius equation from the slope of ln(τ) vs. (KT) -1 curve and the value was (965.24 J). In the same approach, the activation energies of charge carriers were estimated in three different frequency regions; high, moderate, and low regions and the values were 529.31, 698.09, and 541.98 J, respectively.

show abstract

Section: Dielectric Permittivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Untitled

2022

J. Med. Chem. Sci.

View full text Add to dashboard Cite

show abstract

“…Many studies had been carried out to investigate the electrical behavior of clay minerals and its complexes with organic species. Bore et al [39] used a high frequency dielectric relaxation spectroscopy to estimate the interfacial water molecules on the clay interlayers, whereas belyaeva et al [40,41] proposed a modeling approach to calculate the dielectric relaxation of different clay mentals at various temperatures.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant activity, Dielectric and Electrical Properties of N-benzyl-N'-(5-methyl-1H-pyrazol-3-yl) propanimidamide.

Louiz,

Labiadh,

Abderrahim

et al. 2023

Preprint

View full text Add to dashboard Cite

This article mainly focuses on recent advances in the study of the interesting electronic and biological powers of the N-benzyl-N'-(5-methyl-1H-pyrazol-3-yl) propanimidamide. The selected amidine has been previously synthesized, characterized in a previous publication and we present in this research the study of the antioxidant application, electrical activity and dielectric studies of the cristal. In this context, the amidine and the corresponding imidate were compared with ascorbic acid as a reference and showed an interesting antioxidant power, especially in Ferrous ion chelating (FIC) activity and Hydroxyl Radical (OH.) Scavenging. We also studied electrical activity as a function of frequency, impedance and alternating conductivity. The obtained results showed that the compound can be used in order to complex and impedance spectroscopy showed that synthesized amidine is a good short-range proton conductor. Impedance measurements approve the input of the resistive grain frontier on the conduction mechanism. Then, it evidences the existence of many electrical relaxation phenomena in the studied sample. The dielectric constant is temperature dependent indicating that the crystal is a polar dielectric compound and the dipole orientation is governed by increasing temperature.

show abstract

Error in Measuring the Permittivity of Conducting Media by the Broadband Method

Бобров

Родионова

2022

Russ Phys J

View full text Add to dashboard Cite

Modeling of Dielectric Relaxation in Clays at Negative and Positive Temperatures

Cited by 4 publications

References 11 publications

Untitled

Untitled

Antioxidant activity, Dielectric and Electrical Properties of N-benzyl-N'-(5-methyl-1H-pyrazol-3-yl) propanimidamide.

Error in Measuring the Permittivity of Conducting Media by the Broadband Method

Contact Info

Product

Resources

About