Electrical and dielectric properties study of CaZrO3-CaTiO3 composite system by impedance spectroscopy

Hkiri, Khaoula; Salem, M. Ben; Othmani, Abdelhak; Zouaoui, M.

doi:10.1007/s11581-020-03596-4

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…For each temperature, only one peak (Z' max ) was observed, confirming the single semicircle shape of the Nyquist plot. [33] It was also observed that with increasing temperature, the frequency of this peak shifted to higher values, representative of a relaxation process [34] in the synthesized PSÀ NHÀ Im/Ba 2 + .…”

Section: Resultsmentioning

confidence: 79%

The Study of Impedance and Conductivity of New Modified Polystyrene Used as an Effective Adsorbent of Ba(II) Ions

Nourhene

Othmani

Abderrahim

2023

Chemistry & Biodiversity

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In the research described here we prepared a novel, modified polystyrene (PS) with iminoether as the complexing agent for Ba 2 + . Most heavy metals cause environmental, atmospheric pollution. [1][2] They cause consequence for humans health and aquatic life due to their toxicity. They become strongly toxic by mixing with different environmental elements and their removal from contaminated water is very important. The structure of all modified polystyrene such as nitrated polystyrene (PSÀ NO 2 ), aminated polystyrene (PSÀ NH 2 ), aminated polystyrene with imidate group (PSÀ NHÀ Im) and the complex with barium metal (PSÀ NHÀ Im/Ba 2 + ) were analyzed by Fourier transform infrared spectroscopy (FT-IR), and the formation of N-2-Benzimidazolyl iminoether grafted PS was proved. The thermal stability and structure of the polystyrene and modified polystyrene were studied by differential thermal analysis (DTA) and X-ray diffractometry (XRD), respectively. The elemental analysis was used for the determination of the chemical composition of the modified PS. The grafted polystyrene was used in order to adsorb barium from wastewater with an acceptable cost before the wastewater distribution in the environment. The impedance analysis of the polystyrene complex PSÀ NHÀ Im/Ba 2 + indicated an activated thermal conduction mechanism.The conductivity analysis of the complex with barium metal PSÀ NHÀ Im/Ba 2 + was studied; the activation energy was deduced from an Arrhenius plot and corresponded to, E a ¼ 0:85 eV, suggesting PSÀ NHÀ Im/Ba 2 + was a proton-type of semiconductor.

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Section: Resultsmentioning

confidence: 79%

The Study of Impedance and Conductivity of New Modified Polystyrene Used as an Effective Adsorbent of Ba(II) Ions

Nourhene

Othmani

Abderrahim

2023

Chemistry & Biodiversity

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“…The appropriate equivalent circuit modeling the impedance spectra given in figure 2b, consists of a resistance Rs associated serially to a parallel R//CPE [62,63]. The time relaxation, which is time dependent, corresponds to [64,65]. Figure 3 represents the variation of z' (real part) and of z" (imaginary part) of the impedance as a function of the frequency, measured at different temperatures.…”

Section: Electrical and Dielectric Investigations 421 Complex Impedan...mentioning

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

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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.

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Electrical transport properties of YBa2Cu3Oy implanted by CdS nanoparticles: nanoparticle size effect

Hkiri,

Mohamed,

Shahzad

et al. 2023

J Mater Sci: Mater Electron

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Cadmium sulfide nanoparticles size effects on the superconducting properties of YBa2Cu3Oy compound were investigated in details. Solid-state reaction method was used for the synthesis of samples with additional amounts of CdS nanoparticles with sizes 6 nm and 12 nm and an additional amount x = 0.1 wt%. Synthesis of cadmium nanoparticles was done by using aqueous methods and they were characterized by using transmission electron microscopy (TEM), X-ray diffraction (XRD). Optical absorption measurement of the as-synthesized nanoparticles was carried out, and the specific surface areas of the sample were analyzed using a surface area and porosity analyzer. Electrical resistivity and transport critical current densities were measured by using the four-probe technique. The measurements revealed that CdS (6 nm) added samples exhibit higher energy pinning and current densities as compared to pure YBa2Cu3Oy and with additional CdS (12 nm). This implies that the size reduction of CdS can give rise to effective pinning centers which can enhance the superconducting properties in the Y-123 materials.

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Electrical and dielectric properties study of CaZrO3-CaTiO3 composite system by impedance spectroscopy

Cited by 6 publications

References 33 publications

The Study of Impedance and Conductivity of New Modified Polystyrene Used as an Effective Adsorbent of Ba(II) Ions

The Study of Impedance and Conductivity of New Modified Polystyrene Used as an Effective Adsorbent of Ba(II) Ions

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

Electrical transport properties of YBa2Cu3Oy implanted by CdS nanoparticles: nanoparticle size effect

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