Studies on the dielectric behavior and AC conductivity of Zn2+ doped α-PbO nanoparticles synthesized by precipitation method

2017 ◽  
Vol 28 (12) ◽  
pp. 8921-8927
Author(s):  
N. Mythili ◽  
K. T. Arulmozhi
Keyword(s):  
Ac Conductivity ◽  
Dielectric Behavior ◽  
Precipitation Method ◽  
Pbo Nanoparticles

AC conductivity and dielectric behavior in mixed electronic-ionic 30Li2O–4MoO3–(66–x)TeO2–xV2O5 glass system

Ionics ◽  
2017 ◽  
Vol 23 (6) ◽  
pp. 1423-1437 ◽  
Author(s):  
Rosdiyana Hisam ◽  
Ahmad Kamal Yahya ◽  
Halimah Mohamed Kamari ◽  
Zainal Abidin Talib
Keyword(s):  
Ac Conductivity ◽  
Dielectric Behavior ◽  
Glass System

scholarly journals Ac conductivity, electric modulus analysis, dielectric behavior and Bond Valence Sum analysis of Na3Nb4As3O19 compound

2020 ◽  
Vol 13 (6) ◽  
pp. 5627-5638
Author(s):  
Saïda Fatma Chérif ◽  
Amira Chérif ◽  
Wassim Dridi ◽  
Mohamed Faouzi Zid
Keyword(s):  
Ac Conductivity ◽  
Electric Modulus ◽  
Dielectric Behavior ◽  
Bond Valence ◽  
Modulus Analysis ◽  
Bond Valence Sum

Structural and Dielectric Properties of Zn1-xMoxO Nanoparticles

2020 ◽  
Vol 13 (2) ◽  
pp. 165-170
Keyword(s):  
Zinc Oxide ◽  
Dielectric Properties ◽  
Ac Conductivity ◽  
Hexagonal Wurtzite Structure ◽  
Dielectric Constants ◽  
Precipitation Method ◽  
Dielectric Parameters ◽  
Mo Doping ◽  
Lcr Meter ◽  
Co Precipitation

Abstract: In this work, samples of zinc oxide nanoparticles doped by molybdenum (Zn1-xMoxO with 0 ≤ x ≤ 0.1) were prepared by using the wet co-precipitation method. The characterization of the prepared samples was carried out by means of X-ray powder diffraction (XRD). The samples reserved their hexagonal wurtzite structure with Mo doping and showed a decrease in the crystallite size up to x = 0.04 followed by a further increase. On the other hand, dielectric measurements were performed using an LCR meter. The effect of frequency and temperature on the dielectric properties such as the real and imaginary parts of dielectric constant (ε^' and ε'', respectively), dielectric loss (tanδ) and ac-conductivity (σ_ac) of Mo-doped zinc oxide samples, was studied in the frequency range (100 Hz - 1 MHz) and at temperatures (300 - 773 K). The values of room temperature dielectric parameters were found to be strongly dependent on the Mo-doping. However, the increase in temperature caused an enhancement in the values of the dielectric parameters, particularly at 773 K. Keywords: Zinc oxide, XRD, Dielectric constants, Ac-conductivity.

scholarly journals AC conductivity and dielectric behavior of poly (o-phenylenediamine)/TiO2 nanocomposites

2017 ◽  
Vol 5 (1) ◽  
pp. 29
Author(s):  
Archana S.
Keyword(s):  
Thermal Stability ◽  
Polymer Nanocomposites ◽  
Ac Conductivity ◽  
Oxidative Polymerization ◽  
Dielectric Behavior ◽  
High Thermal Stability ◽  
Spectral Techniques ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
The Stability

Poly (o-phenylenediamine) and their nanocomposites with TiO2 nanoparticles were synthesized using oxidative polymerization technique and the polymer nanocomposites were characterized using spectral techniques like FT-IR, UV-VIS spectroscopy and the morphology have been analyzed by XRD, SEM and TEM. The stability of the prepared polymer nanocomposites was studied using TGA, DTA and found to have high thermal stability. The study of ac conductivity, dielectric property revealed that the formed nanocomposites are semiconducting in nature and can be widely used in the field of energy storage and semiconductor devices, in diodes, batteries etc.

Ac conductivity and dielectric behavior of a−Si:H/c−Si1−yGey/p−Si thin films synthesized by molecular beam epitaxial method

2017 ◽  
Vol 705 ◽  
pp. 708-713 ◽  
Author(s):  
Emna Kadri ◽  
Khaled Dhahri ◽  
Amira Zaafouri ◽  
Monem Krichen ◽  
Mohammed Rasheed ◽  
...  
Keyword(s):  
Thin Films ◽  
Ac Conductivity ◽  
Molecular Beam ◽  
Dielectric Behavior ◽  
Molecular Beam Epitaxial

Growth, structure, dielectric behavior and AC-conductivity of pyrochlore lead-scandium tantalate single crystals

1997 ◽  
Vol 32 (11) ◽  
pp. 1543-1549 ◽  
Author(s):  
D. Petrova ◽  
S. Dobreva ◽  
M. Veleva ◽  
J. Macicek ◽  
M. Gospodinov
Keyword(s):  
Single Crystals ◽  
Ac Conductivity ◽  
Dielectric Behavior ◽  
Growth Structure

Dielectric Behavior and Impedance Spectroscopy of Bi2Sr2GdCu2Oy

2003 ◽  
Vol 17 (21) ◽  
pp. 3847-3856 ◽  
Author(s):  
M. Chandrasekhar
Keyword(s):  
Activation Energy ◽  
Temperature Region ◽  
Ac Conductivity ◽  
Room Temperature ◽  
Complex Impedance ◽  
Frequency Dispersion ◽  
Solid State Reaction Method ◽  
Dielectric Behavior ◽  
Nominal Composition ◽  
Present System

Samples with the nominal composition Bi 2 Sr 2 GdCu 2 O y in Bi -2212 where Gd replaces Ca as well as samples without Gd were prepared by solid-state reaction method. From the room temperature X-ray diffraction data, the samples were found to be similar to the single phase Bi -2212 structure. Impedance studies were performed from room temperature to 423 K at different frequencies in the range of 10 to 700 KHz. The AC conductivity increases with temperature and frequency, exhibiting frequency dispersion at low temperature region. The activation energy from AC conductivity in the high temperature region is found to be 0.432 eV. The permitivity increases with the increase in temperature and at 373 K it shows a maximum value exhibiting a dielectric loss. Complex impedance spectra are analyzed in terms of bulk relaxation and interfacial effects. The activation energy of the dipoles involved in the relaxation was estimated to be 0.482 eV. The universal power law of Jonscher is verified in the present system.

scholarly journals Influence of SiO2 nanofillers on polymer-based ZnO nanocomposite flexible sheets as high dielectric and thermally stable materials

2021 ◽  
Author(s):  
S. Pervaiz ◽  
N. Kanwal ◽  
A. Rasheed ◽  
Ijaz Ahmad Khan ◽  
M. Saleem
Keyword(s):  
Dielectric Constant ◽  
Energy Storage ◽  
Ac Conductivity ◽  
Loss Factor ◽  
Precipitation Method ◽  
Low Loss ◽  
Energy Storage Devices ◽  
Light Emitting ◽  
Storage Devices ◽  
High Dielectric

Abstract Polymer-based nanocomposite (NCs) with high dielectric constant and low-loss factor have remarkable applications in light emitting and energy storage devices. Flexible sheets of polymer-based zinc oxide silica (PB-ZnO-SiO 2 ) NCs are synthesized by co-precipitation method. The development of ZnO and SiO 2 planes confirms the synthesis of polycrystalline PB-ZnO-SiO 2 NCs. Peak intensity of ZnO planes is decreased with increasing wt.% of SiO 2 nanofillers. Surface morphology of synthesized PB-ZnO-SiO 2 NCs is associated with increasing wt.% of nanofillers. EDX spectrum confirms the presence of C, O, Zn and Si in the synthesized sheets. FTIR analysis confirms the presence of chemical bounding between the involved elements. Above 450 o C, the weight loss of S-1 is found to be 90.42% which is decreased to 49.32% for sample S-6. Dielectric properties like dielectric permittivity (13.71) with low loss factor (0.025), impedance (Z′=0.16 MΩ) and large AC conductivity (19.92 mS/m) are observed for sample S-6. The values of dielectric constant, low loss factor, low impedance and high AC conductivity of S-6 are 5.11, 0.53, 0.029 and 2.98 times higher than the value of S-1 respectively. These finding confirm that the synthesized flexible sheets are promising candidates for better light emitting and energy storage devices at high temperature.

Dielectric behavior and ac conductivity study of NiO∕Al2O3 nanocomposites in humid atmosphere

2006 ◽  
Vol 100 (9) ◽  
pp. 094323 ◽  
Author(s):  
Mohamad M. Ahmad ◽  
Salah A. Makhlouf ◽  
Kamal M. S. Khalil
Keyword(s):  
Ac Conductivity ◽  
Dielectric Behavior ◽  
Humid Atmosphere
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