Deconvolution of immittance data: Some old and new methods

Macdonald, J. Ross; Tuncer, Enis

doi:10.1016/j.jelechem.2007.01.006

Cited by 23 publications

(17 citation statements)

References 29 publications

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“…(8.4) can be substituted by a sum of discrete functions [378,379]: [378,379] applied this method to study the dispersion of dielectric permittivities. A modification of this procedure was proposed in the literature [389] and applied to determine the time constant distribution function [379]. This method is based on the predistribution of time constants uniformly on the logarithmic scale, and to improve the quality of the analysis, a Monte Carlo technique was used to increase the number of analyzed time constants.…”

Section: Least-squares Deconvolution Methodsmentioning

confidence: 99%

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Electrochemical Impedance Spectroscopy and its Applications

Lasia¹

2014

654

504

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Section: Least-squares Deconvolution Methodsmentioning

confidence: 99%

“…Such information can be obtained even without fitting the experimental impedances to the corresponding models, which might be still unknown. Several methods allow for the determination of the distribution of time constants [378,379], and they will be briefly presented below.…”

Section: Determination Of Time Constant Distribution Functionmentioning

confidence: 99%

Electrochemical Impedance Spectroscopy and its Applications

Lasia¹

2014

654

504

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“…No attempt to model the complex susceptibility is performed in this paper due to difficulties in determining or lack of the electrical properties of the pure, unfilled resin system. One can employ a similar procedure as explained in, 37,[51][52][53][54][77][78][79][80] however the kernel for the Fredholm integral 81 needs to be altered to a temperature-dependent function.…”

Section: Dielectric Mixture Approachmentioning

confidence: 99%

Change in dielectric relaxation with the presence of water in highly filled composites

Tuncer

2017

J. Adv. Dielect.

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It is important to determine the dielectric characteristics of semiconductor encapsulation materials based on epoxy resins. We employed the dielectric spectroscopy technique to investigate the dielectric relaxation in the presence of water and how it changes the relaxation. It was observed that the dielectric relaxation of the material was significantly influenced by absorbed water, the local segmental motion (also known as Johari-Goldstein ( ) relaxation) was influenced most by the presence of the water, it was modified by the wet sample compared to dry one, and required high activation energy. The relaxation related to the glass transition was contributed by the cooperative motion (the -relaxation) of the epoxy resin system. The -relaxation was shifted to a low temperature in the wet sample compared to dry one. The relaxation was modeled with a clear Vogel-Fulcher-Tammann-Hesse (VFTH) behavior; the Vogel temperature of the wet sample was 8 K lower than the dry sample. The presence of water acts as a plasticizer for the molecular relaxation, and speed-up the cooperative process. The measured data were also used to estimate the electrical properties of the resin system by employing an effective-medium model together with a porous media continuum model by taking into account the physical properties of the system. It is already known that the influence of water in semiconductor packaging is important in sensitive applications. The presented measurements and the analysis method would be appreciated within the semiconductor packaging community to improve material selection and performance evaluation efforts.

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“…There exist numerical methods without a priori assumptions to tackle frequency to time and time to frequency conversions using the distribution of relaxation times approach. There are several papers on this topic by different authors (for example, see [27][28][29][30][31]). …”

Section: Resultsmentioning

confidence: 99%

Fractional equations of Curie–von Schweidler and Gauss laws

Tarasov

2008

J. Phys.: Condens. Matter

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The dielectric susceptibility of most materials follows a fractional power-law frequency dependence that is called the 'universal' response. We prove that in the time domain this dependence gives differential equations with derivatives and integrals of noninteger order. We obtain equations that describe 'universal' Curie-von Schweidler and Gauss laws for such dielectric materials. These laws are presented by fractional differential equations such that the electromagnetic fields in the materials demonstrate 'universal' fractional damping. The suggested fractional equations are common (universal) to a wide class of materials, regardless of the type of physical structure, chemical composition, or of the nature of the polarization.

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Deconvolution of immittance data: Some old and new methods

Cited by 23 publications

References 29 publications

Electrochemical Impedance Spectroscopy and its Applications

Electrochemical Impedance Spectroscopy and its Applications

Change in dielectric relaxation with the presence of water in highly filled composites

Fractional equations of Curie–von Schweidler and Gauss laws

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