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Pàgina inicial > Articles > Articles publicats > Thermal transport in silver-coated polymer sphere composites by the bidirectional 3 ω method |
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 |
Publicat 9 p, 1.6 MB |