Effective conductivity in association with model structure and spatial inhomogeneity of polymer/carbon black composites

Garncarek, Zbigniew; Piasecki, R.; Borecki, J.; Maj, A.; Sudoł, M.

doi:10.1088/0022-3727/29/5/036

Cited by 19 publications

(13 citation statements)

References 15 publications

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“…In regularly distributed systems composed of hard spheres (in 3-dimensions) or hard disks (in 2-dimensions) percolation is only observed close to limiting concentrations [11,246,20,22]. Other studies have shown that not only the percolation of one of the phases but the field, charge [288,239,294,48,295] and particle related issues [212,192,296,297,99,298] should also be considered.…”

Section: Percolation Theorymentioning

confidence: 99%

Dielectric mixtures: electrical properties and modeling

Tuncer

Serdyuk

Gubanski

2002

IEEE Trans. Dielect. Electr. Insul.

272

154

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A review of current state of understanding of dielectric mixture properties and approaches to use numerical calculations for their modeling are presented. It is shown that interfacial polarization can yield different non-Debye dielectric responses depending on the properties of the constituents, their concentrations and geometrical arrangements. Future challenges on the subject are also discussed.

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Section: Percolation Theorymentioning

confidence: 99%

Dielectric mixtures: electrical properties and modeling

Tuncer

Serdyuk

Gubanski

2002

IEEE Trans. Dielect. Electr. Insul.

272

154

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“…This model situation has been assumed in Refs. [9][10][11][12]. However, it has been shown [13] that this idealized for blackwhite micrographs method needs a modification in the case of finite-sized objects like pixels.…”

Section: Introductionmentioning

confidence: 99%

Entropic measure of spatial disorder for systems of finite-sized objects

Piasecki

2000

Physica A: Statistical Mechanics and its Applications

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We consider the relative configurational entropy per cell S_Delta as a measure of the degree of spatial disorder for systems of finite-sized objects. It is highly sensitive to deviations from the most spatially ordered reference configuration of the objects. When applied to a given binary image it provides the quantitatively correct results in comparison to its point object version. On examples of simple cluster configurations, two-dimensional Sierpinski carpets and population of interacting particles, the behaviour of S_Delta is compared with the normalized information entropy H' introduced by Van Siclen [Phys. Rev. E 56, (1997) 5211]. For the latter example, the additional middle-scale features revealed by our measure may indicate for the traces of self-similar structure of the weakly ramified clusters. In the thermodynamic limit, the formula for S_Delta is also given.Comment: 18 pages, 4 figure

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“…This approach has already been explored for other types of systems such as polymer/carbon composites. [19] The electrical resistivity was thus predicted as a function of CNT content with different arrangements (relative CNT and electrical current orientation) using diverse established models. These six models, summarized in Table 4, are those valid for conductivity/resistivity modeling, among many others with different applications.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Reinforcement Distribution and Interface on the Electronic Transport Properties of MWCNT‐Reinforced Metal Matrix Composites

et al. 2016

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The transition toward an electricity-driven world is testing electrical contact materials to their limits. Specifically, new alternatives are needed where composites that sacrificed conductivity in exchange for reduced weldability and higher heat dissipation sufficed. Carbon nanotubes (CNT) have the potential to close the gap as ideal fillers due to their outstanding intrinsic properties, pushing the application limits further. However, the reported electrical conductivity measurements show no clear tendency. In the present study, the authors attempt to shed some light on this matter by focusing on the causes behind those results. It is observed that the addition of 1 wt% CNT improves the conductivity of nickel, followed by a drop for higher concentrations, measured by four-point probe testing. Six nanotube orientation models describing different CNT arrangements are contrasted to the experimental data. Corrected values for nickel and CNT resistivities effectively place that of the composites close to the models, providing indications of a preferential orientation. It is concluded that, in contrast to what is widely reported, the main contributing factors to the resistivity are inter-tube coupling, porosity, and interfacial scattering, whereas clustering marginally influences the behavior.

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Effective conductivity in association with model structure and spatial inhomogeneity of polymer/carbon black composites

Cited by 19 publications

References 15 publications

Dielectric mixtures: electrical properties and modeling

Dielectric mixtures: electrical properties and modeling

Entropic measure of spatial disorder for systems of finite-sized objects

Influence of the Reinforcement Distribution and Interface on the Electronic Transport Properties of MWCNT‐Reinforced Metal Matrix Composites

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