Dielectric response of materials: extension to the Debye model

Mantas, P.Q.

doi:10.1016/s0955-2219(98)00273-8

Cited by 93 publications

(43 citation statements)

References 8 publications

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“…Both " r and tan increase with temperature due to the increase of conduction electrons due to thermal activation. 26 No dielectric anomaly has been observed for the studied composites for selected range of temperatures (25-450 C). …”

Section: Dielectric Properties Studymentioning

confidence: 86%

Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO₃–PbTiO₃ composites

Sahu

Behera

2017

J. Adv. Dielect.

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The polycrystalline samples of 0.8BiSm x Fe 1Àx O 3 -0.2PbTiO 3 (x ¼ 0:05; 0:10; 0:15 and 0.20) were prepared by using the conventional solid-state reaction technique and sintered at high temperature (850 C). X-ray diffraction (XRD) confirms the distorted rhombohedral crystal structure for all the composites at room temperature. The surface morphology was checked by field-emission scanning electron microscope (FESEM) technique and homogeneous mixing of the components was confirmed by energydispersive analysis of X-ray (EDAX). The detailed study of dielectric properties of the composites reveals an increasing nature of dielectric constant (" r ) and loss tangent (tan) with the increase of temperature due to thermal activation. The Arrhenius plots of temperature dependence of AC conductivity yield the activation energy within the material at high-temperature range. The ferroelectric study shows that the remnant polarization decreases with the increase of Samarium (Sm) concentration.

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Section: Dielectric Properties Studymentioning

confidence: 86%

Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO₃–PbTiO₃ composites

Sahu

Behera

2017

J. Adv. Dielect.

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“…In more complex situations, care should be taken in proposing an equivalent circuit to model the observed behavior [6], [7]. While the data of impedance and phase can be used to derive other physical quantities for any equivalent circuit, capacitance, resistance and permittivity given by the IS GUI here described should only be used on the assumption that the parallel RC equivalent circuit is valid.…”

Section: A Theoretical Backgroundmentioning

confidence: 99%

Python GUI for impedance spectroscopy analysis

Rech¹,

Perottoni²

2018

Sci. cum Ind.

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A graphical user interface (GUI) for a widely used instrument, namely the Keysight 4294A impedance analyzer, was developed in Python language. This GUI allows control of instrument, acquisition and processing of impedance spectra from dielectric materials and electric circuits. Examples of analysis of electric circuits and porous alumina are provided to illustrate some of the GUI possible applications.

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“…It is also clear that Љ increases slightly by increasing temperature. Fitting of the data was performed by a computer program based on all the different spectral functions commonly used in dielectric research, such as Debye, 23 Cole-Cole, 24 Cole-Davidson, 25 Havriliak-Negami, 22 Fröhlich, 26 and Rocard-Powles. 22 The best fitting of the data was done by a superposition of Havriliak-Negami and Fröhlich functions in addition to the conductivity term.…”

Section: Electric Propertiesmentioning

confidence: 99%

Thermal stability and dielectric relaxation of natural rubber/soda lignin and natural rubber/thiolignin composites

Botros

Eid

Nageeb

2005

J of Applied Polymer Sci

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ABSTRACT:The influence of soda lignin and thiolignin on the mechanical properties (tensile strength and elongation at rupture) as well as on the dielectric properties (conductivity (), permittivity (Ј), dielectric loss (Љ), and dielectric relaxation time ()) of their composites with natural rubber (NR) was investigated. All measurements were carried out on NR, NR/soda lignin (20 phr), and NR/thiolignin (20, 30, and 40 phr) composites. The mechanical properties reveal that NR/thiolignin composite possesses the best thermal stability and 20 phr is the optimum thiolignin loading. The dielectric study was carried out over a frequency range from 100 Hz to 100 kHz at temperature range from 20 to 80°C. Dielectric data were fitted in the frequency domain using Havriliak-Negami and Frö hlich functions in addition to the conductivity term. The different relaxation mechanisms in the system were also discussed according to these functions.

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Dielectric response of materials: extension to the Debye model

Cited by 93 publications

References 8 publications

Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO₃–PbTiO₃ composites

Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO₃–PbTiO₃ composites

Python GUI for impedance spectroscopy analysis

Thermal stability and dielectric relaxation of natural rubber/soda lignin and natural rubber/thiolignin composites

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Dielectric response of materials: extension to the Debye model

Cited by 93 publications

References 8 publications

Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO3–PbTiO3 composites

Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO3–PbTiO3 composites

Python GUI for impedance spectroscopy analysis

Thermal stability and dielectric relaxation of natural rubber/soda lignin and natural rubber/thiolignin composites

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Product

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Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO₃–PbTiO₃ composites

Investigation on structural, dielectric and ferroelectric properties of samarium-substituted BiFeO₃–PbTiO₃ composites