High thermal conductivity epoxy molding compound filled with a combustion synthesized AlN powder

Abstract

A combustion synthesized AlN powder was studied for its feasibility as a filler for epoxy molding compound (EMC) and effects of various experimental parameters on the thermal conductivity and moisture resistance of the EMC were investigated. The AlN powder was coated with silane both to increase the moisture resistance of the EMC and to enhance the bonding between the filler AlN and the matrix resin. The thermal conductivity could be significantly increased by using AlN powders with large particle sizes and this was considered to be due to a reduction in interface area between the AlN particles and the matrix resin. A thermal conductivity of 14 W/mK was obtained when the EMC was fabricated by a process involving no use of a solvent and a AlN powder with a particle size of 35.3 mm and a filler content of 67 vol % were used.

Effect of amounts and types of silicon nitride on thermal conductivity of Si₃N₄/epoxy resin composite

“…22)24) For example, Bujard et al reported an alumina/epoxy resin composite with 50 vol.% alumina content with thermal conductivity of around 1.5 W/(m·K), 22) while Hsieh et al reported a AlN/epoxy composite at 45 vol.% of AlN content with a thermal conductivity of around 1.3 W/(m·K). 25) Differences in thermal conductivity were clearly observed in the region above 50 vol.% (2nd region). Both the ¡-and ¢-SN filler-loaded composites showed a rapid increase in thermal conductivity in the 2nd region.…”

Enhanced Performance of Induction Cookers by the Use of Polymer Composites

“…Several polymer composites using aluminum nitride (AlN) [4] and boron nitride (BN) [5] powders (or fillers) were fabricated and their performance was tested. Some important physical properties, including the purity and the size, are summarized in Table 1.…”

Thermal and mechanical properties of epoxy composites with a binary particle filler system consisting of aggregated and whisker type boron nitride particles

“…Some thermally conductive fillers, such as boron nitride (BN), have been considered as attractive candidates on account of their advantageous properties, such as high temperature stability, large thermal conductivity, high mechanical strength, extreme hardness, corrosion resistance, and oxidation resistance. These properties make BN an interesting material for many applications, such as in refractories, as lubricants, in grinding, optical coatings, and ceramic composites [5][6][7].…”