Simsek, ING;
Nistal, A;
García, E;
Pérez-Coll, D;
Miranzo, P;
Osendi, MI;
(2017)
The effect of graphene nanoplatelets on the thermal and electrical properties of aluminum nitride ceramics.
Journal of the European Ceramic Society
, 37
(12)
pp. 3721-3729.
10.1016/j.jeurceramsoc.2016.12.044.
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Abstract
The thermal conductivity (κ) of AlN (2.9 wt.% of Y_{2}O_{3}) is studied as a function of the addition of multilayer graphene (from 0 to 10 vol.%). The κ values of these composites, fabricated by spark plasma sintering (SPS), are independently analyzed for the two characteristic directions defined by the GNPs orientation within the ceramic matrix; that is to say, perpendicular and parallel to the SPS pressing axis. Conversely to other ceramic/graphene systems, AlN composites experience a reduction of κ with the graphene addition for both orientations; actually the decrease of κ for the in-plane graphene orientation results rather unusual. This behavior is conveniently reproduced when an interface thermal resistance is introduced in effective media thermal conductivity models. Also remarkable is the change in the electrical properties of AlN becoming an electrical conductor (200 S m⁻¹) for graphene contents above 5 vol.%.
| Type: | Article |
|---|---|
| Title: | The effect of graphene nanoplatelets on the thermal and electrical properties of aluminum nitride ceramics |
| Location: | Cuenca, SPAIN |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jeurceramsoc.2016.12.044 |
| Publisher version: | https://doi.org/10.1016/j.jeurceramsoc.2016.12.044 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Aluminum nitride (AlN), Graphene, Composites, Thermal conductivity, Interface thermal resistence, Electrical conductivity |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10071882 |
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