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Cited by 351

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Thermal Percolation Threshold and Thermal Properties of Composites with High Loading of Graphene and Boron Nitride Fillers

Open access
Kargar, Fariborz, Barani, Zahra, Salgado, Ruben, Debnath, Bishwajit, Lewis, Jacob S., Aytan, Ece, Lake, Roger K., Balandin, Alexander A.·2018·ACS Applied Materials & Interfaces

Abstract

We investigated thermal properties of the epoxy-based composites with the high loading fraction—up to f ≈ 45 vol %—of the randomly oriented electrically conductive graphene fillers and electrically insulating boron nitride fillers. It was found that both types of the composites revealed a distinctive thermal percolation threshold at the loading fraction f T > 20 vol %. The graphene loading required for achieving thermal percolation, f T, was substantially higher than the loading, f E, for electrical percolation. Graphene fillers outperformed boron nitride fillers in the thermal conductivity enhancement. It was established that thermal transport in composites with high filler loadings, f ≥ f T, is dominated by heat conduction via the network of percolating fillers. Unexpectedly, we determined that the thermal transport properties of the high loading composites were influenced strongly by the cross-plane thermal conductivity of the quasi-two-dimensional fillers. The obtained results shed light on the debated mechanism of the thermal percolation, and facilitate the development of the next generation of the efficient thermal interface materials for electronic applications.

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Metadata

Authors
Kargar, F., Barani, Z., Salgado, R., Debnath, B., Lewis, J. S., Aytan, E., Lake, R. K., & Balandin, A. A.
Venue
ACS Applied Materials & Interfaces
Published
2018-10-09
Volume
10
Issue
43
Pages
37555-37565
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2896086454
Cited by
351
References
9
FWCI
14.28
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Thermal Percolation Threshold and Thermal Properties of Composites with High Loading of Graphene and Boron Nitride Fillers. https://app.cochat.ai/papers/10.1021/acsami.8b16616
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Kargar, F., Barani, Z., Salgado, R., Debnath, B., Lewis, J. S., Aytan, E., Lake, R. K., & Balandin, A. A. (2018). Thermal Percolation Threshold and Thermal Properties of Composites with High Loading of Graphene and Boron Nitride Fillers. ACS Applied Materials & Interfaces. https://doi.org/10.1021/acsami.8b16616

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