Barun Ghosh
Highly Ordered BN⊥–BN⊥ Stacking Structure for Improved Thermally Conductive Polymer Composites
Ghosh, Barun; Xu, Fang; Grant, David M.; Giangrande, Paolo; Gerada, Chris; George, Michael W.; Hou, Xianghui
Authors
FANG XU FANG.XU@NOTTINGHAM.AC.UK
Assistant Professor
DAVID GRANT DAVID.GRANT@NOTTINGHAM.AC.UK
Professor of Materials Science
Paolo Giangrande
CHRISTOPHER GERADA CHRIS.GERADA@NOTTINGHAM.AC.UK
Professor of Electrical Machines
MICHAEL GEORGE mike.george@nottingham.ac.uk
Professor of Chemistry
Xianghui Hou
Abstract
The substantial heat generation in modern electronic devices is one of the major issues requiring efficient thermal management. This work demonstrates a novel concept for the design of thermally conducting networks inside a polymer matrix for the development of highly thermally conductive composites. Highly ordered hexagonal boron nitride (hBN) structures are obtained utilizing a freeze‐casting method. These structures are then thermally sintered to get a continuous network of BN⊥–BN⊥ of high thermal conductivity in which a polymer matrix can be impregnated, enabling a directional and thermally conducting composite. The highest achieved thermal conductivity (K) is 4.38 W m−1 K−1 with a BN loading of 32 vol%. The effect of sintering temperatures on the K of the composite is investigated to optimize connectivity and thermal pathways while maintaining an open structure (porosity ≈ 2.7%). The composites also maintain good electrical insulation (volume resistivity ≈ 1014 Ω cm). This new approach of thermally sintering BN⊥–BN⊥ aligned structures opens up a new avenue for the design and preparation of filler alignment in polymer‐based composites for improving the thermal conductivity while maintaining high electrical resistance, which is a topic of interest in electronic packaging and power electronics applications.
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 16, 2020 |
Online Publication Date | Oct 8, 2020 |
Publication Date | 2020-11 |
Deposit Date | Dec 2, 2020 |
Publicly Available Date | Dec 8, 2020 |
Journal | Advanced Electronic Materials |
Electronic ISSN | 2199-160X |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
Volume | 6 |
Issue | 11 |
Article Number | 2000627 |
DOI | https://doi.org/10.1002/aelm.202000627 |
Keywords | Electronic, Optical and Magnetic Materials |
Public URL | https://nottingham-repository.worktribe.com/output/4948508 |
Publisher URL | https://onlinelibrary.wiley.com/doi/10.1002/aelm.202000627 |
Files
Aelm.202000627(1)
(2.2 Mb)
PDF
Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
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