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Journal of Materials Engineering and Performance
Erschienen in: Journal of Materials Engineering and Performance 3/2018

23.01.2018

Controlled High Filler Loading of Functionalized Al2O3-Filled Epoxy Composites for LED Thermal Management

verfasst von: Anithambigai Permal, Mutharasu Devarajan, Huong Ling Hung, Thomas Zahner, David Lacey, Kamarulazizi Ibrahim

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 3/2018

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Abstract

Thermal management in light-emitting diode (LED) has been extensively researched recently. This study is intended to develop an effective thermally conductive epoxy composite as thermal interface material (TIM) for headlamp LEDs. Silane-functionalized aluminum oxide (Al2O3) powder of different average particle sizes (44 and 10 µm) was studied for its feasibility as filler at its maximum loading. A detailed comparison of three different methods of particle dispersions, hand-mix, speed-mix and calendaring process (3-roll mill), has been reported. The dispersion of Al2O3 particles, the thermal conductivity and thermal degradation characteristics of the composites were investigated and explained in detail. At 75 wt.% filler loading, 10 and 44 µm Al2O3 achieved composite thermal conductivities of 1.13 and 2.08 W/mK, respectively, which is approximately 528 and 1055% of enhancement with respect to neat epoxy. The package-level thermal performance of the LED employing the Al2O3-filled TIMs was carried out using thermal transient analysis. The experimental junction-to-ambient thermal resistances (RthJ-A) achieved were 6.65, 7.24, and 8.63 K/W for Al2O3_44µm, Al2O3_10µm and neat epoxy, respectively. The results revealed that the Al2O3_44µm fillers-filled composite performed better in both material-level and package-level thermal characteristics.
Vorheriger Artikel Weldability and Impact Energy Properties of High-Hardness Armor Steel
Nächster Artikel Determination of the Frictional Behavior at Compaction of Powder Materials Consisting of Spray-Dried Granules

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Metadaten
Titel
Controlled High Filler Loading of Functionalized Al2O3-Filled Epoxy Composites for LED Thermal Management
verfasst von
Anithambigai Permal
Mutharasu Devarajan
Huong Ling Hung
Thomas Zahner
David Lacey
Kamarulazizi Ibrahim
Publikationsdatum
23.01.2018
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 3/2018
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-018-3151-y

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