Thermal transport in silver-coated polymer sphere composites by the bidirectional 3 ω method
Sandell, Susanne (Norwegian University of Science and Technology. Department of Structural Engineering)
Wang, Thorstein (Norwegian University of Science and Technology. Department of Structural Engineering)
Chávez Ángel, Emigdio (Institut Català de Nanociència i Nanotecnologia)
Kristiansen, Helge (Conpart AS)
Zhang, Zhiliang (Norwegian University of Science and Technology. Department of Structural Engineering)
He, Jianying (Norwegian University of Science and Technology. Department of Structural Engineering)

Data:	2022
Resum:	The bidirectional 3 ω method is an electrothermal technique that is commonly used to obtain the thermal conductivity of materials such as liquids, biological samples, and pastes. In this work, an epoxy-based adhesive was filled with monodisperse 10 μm polymethyl methacrylate spheres coated with silver thin films (AgPS), such that a metallic network that dominated the thermal transport was formed through the composite. The bidirectional 3 ω method was used to obtain the thermal conductivity of the conductive adhesive at different volume fractions of AgPS. For 50 vol. % AgPS, corresponding to 3. 4 vol. % silver, the thermal conductivity was 2. 03 ± 0. 21 W m-1 K-1. The results show that the thermal conductivity is strongly correlated with the AgPS volume fraction, while maintaining a volume fraction of silver far below the commercial silver paste, which has typical filler fractions of 40 vol. % silver. The results of this work were compared to thermal measurements of the same material by other techniques, and advantages and disadvantages of the methods were finally discussed.
Ajuts:	European Commission 289061 Agencia Estatal de Investigación PGC2018-101743-B-I00 Agencia Estatal de Investigación SEV-2017-0706
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Biological samples ; Coated polymers ; Conductive adhesive ; Epoxy-based ; Metallics ; Mono-disperse ; Polymer spheres ; Silver pastes ; Silver thin films ; Thermal transport
Publicat a:	Journal of applied physics, Vol. 131, issue 12 (March 2022) , art. 125107, ISSN 1089-7550

Correccions a l'article: https://ddd.uab.cat/record/273658
DOI: 10.1063/5.0080682

Publicat 9 p, 1.6 MB

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