RETRACTED ARTICLE: Effect of temperature on the dielectric properties of carbon black-filled polyethylene matrix composites below the percolation threshold

Shin, Soon-Gi; Kwon, In-Kyu

doi:10.1007/s13391-011-0913-1

Cited by 15 publications

(9 citation statements)

References 11 publications

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“…Commercially available paper made of recycled fibers, with a thickness of 97 μm, was used as the substrate for the surface coating process. The volume fraction of carbon black and graphite was estimated by assuming that their densities were 1.8 and 2.2 g/cm 3 , respectively (Shin and Kwon 2011). Deionized water was used for all experiments.…”

Section: Methodsmentioning

confidence: 99%

Percolation for Coated Conductive Paper: Electrical Conductivity as a Function of Volume Fraction of Graphite and Carbon Black

Li¹,

Qian²,

Li³

et al. 2015

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Conductive papers were prepared via surface coating with graphite or carbon black using either carboxylated styrene butadiene latex or starch as the binder. It is of practical interest to determine the percolation threshold for the coated paper product made using a binary system consisting of conductive filler and binder. In this study, the electroconductivity threshold of various conductive papers was determined based on experimental data according to the percolation law. Results showed that the conductivity of coated, conductive paper is a function of the volume fraction of conductive filler, which can be described well by the percolation theory. The percolation thresholds of graphite/latex, graphite/starch, carbon black/latex, and carbon black/starch coatings were 17.66, 12.36, 11.71, and 8.69 vol.%, respectively. At concentrations higher than the percolation threshold, the conductivity of conductive paper using graphite as the conductive filler was much higher than that achieved using carbon black at a similar volume fraction. The present paper has significant practical implications for conductive paper technology using graphite filler based on surface coating technology.

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Section: Methodsmentioning

confidence: 99%

Percolation for Coated Conductive Paper: Electrical Conductivity as a Function of Volume Fraction of Graphite and Carbon Black

Li¹,

Qian²,

Li³

et al. 2015

BioResources

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“…2. As it is evident, the closer the value of the bulk fraction of semiconductor particles p V to the threshold of its value p C ¼ 1=3, 33,35 the larger the absolute values " expression (12) can be transformed into the following form:…”

Section: Statistical Mixturementioning

confidence: 99%

High-frequency capacitance-voltage characteristics of the heterogeneous structure based on the model of spherical semiconductor particles in a dielectric

Тонкошкур

Иванченко

2016

J. Adv. Dielect.

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The dependence of the parameters of the capacitance effect in heterogeneous dispersed two-component structures based on semiconductors from the bulk fraction of the semiconductor component is modeled. The used method for determining the changes of the energy bands bending on the surface of the spherical semiconductor particle by applying dc electric field allowed to calculate the changes of the dipole moment and effective (taking into account the polarization of the free charge) dielectric constant of this semiconductor particle. This result allowed to use the known models of the dielectric constant of two-component structures for the description of the capacitance field effect in the heterogeneous structures. The relations allowing to estimate the value of the bulk donor concentration in the semiconductor component of the matrix of the heterogeneous system and the statistical mixture have been obtained. The approbation of the obtained calculation relations to evaluate the donor concentration in the ZnO grains of zinc oxide varistor ceramics leads to the correct values that are consistent with estimates of other methods and models. It is established that the sensitivity of the relative dielectric constant to the applied dc electric field is dependent on the bulk fraction of the semiconductor particles in the heterogeneous structures. The bulk fraction of the semiconductor particles significantly affects on the dielectric constant beginning with the values from $ 0:8 for matrix systems and $ 0:33 for statistical mixtures.

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“…The excellent high temperature strength of the δ-phase in the composite was considered to arise from the δ-phase being dislocation free, 8,13) because the lamellar thickness of the δ-phase is extremely small and its shear modulus is larger than that of the β-phase.…”

Section: Analysis Of the Strengthmentioning

confidence: 99%

Analysis of the Strength Property for TiC-Mo Composites at High Temperature

Shin¹

2014

Korean. J. Mater. Res.

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TiC-21 mol% Mo solid solution (δ-phase) and TiC-99 mol% Mo solid solution (β-phase), and TiC-(80~90) mol% Mo hypo-eutectic composite were deformed by compression in a temperature range from room to 2300 K and in a strain rate range from 4.9 × 10 −5 to 6.9 × 10 −3 /s. The deformation behaviors of the composites were analyzed from the strengths of the δ-and β-phases. It was found that the high strength of the eutectic composite is due primarily to solution hardening of TiC by Mo, and that the δ-phase undergoes an appreciable plastic deformation at and above 1420 K even at 0.2% plastic strain of the composite. The yield strength of the three kinds of phase up to 1420 K is quantitatively explained by the rule of mixture, where internal stresses introduced by plastic deformation are taken into account. Above 1420 K, however, the calculated yield strength was considerably larger than the measured strength. The yield stress of β-phase was much larger than that of pure TiC. A good linear relationship was held between the yield stress and the plastic strain rate in a double-logarithmic plot. The deformation behavior in δ-phase was different among the three temperature ranges tested, i.e., low, intermediate and high. At an intermediate temperature, no yield drop occurred, and from the beginning the work hardening level was high. At the tested temperature, a good linear relationship was held in the double logarithmic plot of the yield stress against the plastic strain rate. The strain rate dependence of the yield stress was very weak up to 1273 K in the hypo-eutectic composite, but it became stronger as the temperature rose.

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RETRACTED ARTICLE: Effect of temperature on the dielectric properties of carbon black-filled polyethylene matrix composites below the percolation threshold

Cited by 15 publications

References 11 publications

Percolation for Coated Conductive Paper: Electrical Conductivity as a Function of Volume Fraction of Graphite and Carbon Black

Percolation for Coated Conductive Paper: Electrical Conductivity as a Function of Volume Fraction of Graphite and Carbon Black

High-frequency capacitance-voltage characteristics of the heterogeneous structure based on the model of spherical semiconductor particles in a dielectric

Analysis of the Strength Property for TiC-Mo Composites at High Temperature

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