The effect of particle size distribution on the formation of percolation clusters

Dovzhenko, A. Yu.; Zhirkov, P. V.

doi:10.1016/0375-9601(95)00465-f

Cited by 13 publications

(5 citation statements)

References 4 publications

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“…[35,36] Here, we attribute the 2% variation from the theoretical prediction to the non-ideal shape and size distribution of the silver clusters. [37][38][39] …”

Section: Electrical Conductivitymentioning

confidence: 99%

Photopatternable Conductive PDMS Materials for Microfabrication

Cong

Pan

2008

Adv Funct Materials

175

122

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Conductive photodefinable polydimethylsiloxane (PDMS) composites that provide both high electrical conductivity and photopatternability have been developed. The photosensitive composite materials, which consist of a photosensitive component, a conductive filler, and a PDMS pre‐polymer, can be used as a negative photoresist or a positive photoresist with an additional curing agent. A standard photolithographic approach has been used to fabricate conductive elastomeric microstructures. Feature sizes of 60 µm in the positive photoresist and 10 µm in the negative photoresist have been successfully achieved. Moreover, as the conductive filler, silver powders significantly improve the electrical conductivity of the PDMS polymer, but also provide enhanced mechanical and thermal properties as well as interesting biological properties. The combined electrical, mechanical, thermal, and biological properties along with photopatternability make the PDMS‐Ag composite an excellent processable and structural material for various microfabrication applications.

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“…[35,36] Here, we attribute the 2% variation from the theoretical prediction to the non-ideal shape and size distribution of the silver clusters. [37][38][39] …”

Section: Electrical Conductivitymentioning

confidence: 99%

Photopatternable Conductive PDMS Materials for Microfabrication

Cong

Pan

2008

Adv Funct Materials

175

122

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“…In percolation theory, it can be seen that the size of the particles required to fill a space has an obvious effect on the percolation phenomenon [8]. This is because the pixels representing one aggregate are correlated.…”

Section: Modelsmentioning

confidence: 99%

Mechanical threshold of cementitious materials at early age

Torrenti

Benboudjema

2005

Mat. Struct.

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At early age, the mechanical characteristics of concrete, such as Young's modulus, follow a rapid rate of change. If strains are restricted or in the event of strain gradients, tensile stresses are generated and there is a risk of cracks occurring. Besides relaxation, change in Young's modulus as a function of the degree of hydration is a major parameter for the modeling of this phenomenon. In this evolution, a threshold of the degree of hydration has to be taken into account, below which concrete displays negligible stiffuess. For cement pastes, a simplified hydration model shows that percolation of the solid phases depends on the w/c ratio, which is in accordance with experimental results. On the other hand, for mortar or concrete, the presence of aggregates means that the solid volumetric fraction is such that percolation is observed before hydration occurs. Therefore another parameter is introduced: cohesion due to hydration products. By coupling our model with a finite-element code (CAST3M), it is shown that the threshold for Young's modulus in mortar is almost independent of the w/c ratio, which is in accordance with experimental results.

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“…This is attributed to the integration of major accommodating characteristics of the two ceramic components resulting in better adsorption of paraffin by the biceramic powder. Also, according to the percolation theory, the percolation threshold of particles decreases by using the mixture of powders with bimodal PSD [29] which in turn increases the chance of formation of longer-range pathways for heat conduction. This is also evidenced by energy dispersive X-ray spectrometry (EDS, Oxford Instruments, United Kingdom) of composites' cross-sectional area.…”

Section: Particle Size Analysismentioning

confidence: 99%

Effects of Biceramic AlN-SiC Microparticles on the Thermal Properties of Paraffin for Thermal Energy Storage

Badakhsh

Park

et al. 2018

Journal of Nanomaterials

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Herein, simplified time-efficient production of AlN-coated SiC (SiC@AlN) ceramic powder was practiced. Short-term vibratory ball milling with high frequency was employed to integrate the microsize particles. Also, paraffin as a significant phase change material (PCM) was reinforced using the manufactured SiC@AlN in order to enhance the thermal conductivity (TC) and stability of the final composite. Various characterization methods were used to clarify the changes in particle size of the biceramic powder as well as the thermal features of the paraffin-based composite. Manufactured SiC@AlN was found to be the most effective in the improvement of interfacial adhesion of composite components and the subsequent enhancement of TC, compared with singular ceramic powders as the reinforcing agents. Also, differential scanning calorimetry (DSC) indicated a very slight increase in latent heat of the fabricated composite PCM.

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The effect of particle size distribution on the formation of percolation clusters

Cited by 13 publications

References 4 publications

Photopatternable Conductive PDMS Materials for Microfabrication

Photopatternable Conductive PDMS Materials for Microfabrication

Mechanical threshold of cementitious materials at early age

Effects of Biceramic AlN-SiC Microparticles on the Thermal Properties of Paraffin for Thermal Energy Storage

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