Abstract
The thermal conductivities of composites with an epoxy-terminated dimethylsiloxane (ETDS) matrix and boron nitride (BN) powder fillers were investigated. Two surface curing agents, 3-glycidoxypropyltrimethoxysilane (KBM-403) and 3-chloropropyltrimethoxysilane (KBM-703), were doped onto the surfaces of hydroxyl-functionalized boron nitride using a simple sol-gel process to act as fillers in the thermally conducting composites. These synthesized materials were embedded in epoxy resin via a solvent casting method. The surface modification had an appreciable effect on the thermal conductivity resulting in increased thermal conductivity up to 70 wt%. The thermal conductivities of the composites containing 70 wt% BN particles treated with the KBM-403 and KBM-703 curing agents were 4.11 and 3.88 W/mK, respectively, compared to 2.92 W/mK for the composite without surface treatment.
Original language | English |
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Pages (from-to) | 2047-2056 |
Number of pages | 10 |
Journal | Ceramics International |
Volume | 40 |
Issue number | 1 PART B |
DOIs | |
State | Published - Jan 2014 |
Keywords
- B. Composites
- C. Thermal conductivity
- D. Nitrides
- Surface treatment