Electro-physical properties of composites with nano-sized oxides.
Polymer matrix nano-sized oxide composites were fabricated by using a modified injection molding in which nano-sized silicon oxide and nano-sized magnesium oxide were contained. Thermal decomposition and evaporation of organic resin depended on the composition of the composites. Nano-sized oxides were uniformly distributed in the composites produced by a modified injection molding combining vacuum degassing and curing at a moderate temperature. 0.2 wt.% of silicon oxide addition to epoxy resin showed the maximum electric field of 3.6, whereas, 2.0 wt.% of magnesium oxide addition was required to reach the same value of electrical field. Both of thermal conductivity and thermal diffusivity of the nano-sized silicon oxide-epoxy composites tended to be increased with silicon oxide content. The relative permittivity of the nano-sized silicon oxide-epoxy composites increased from 5.16 to 5.31 by adding 0.6 wt.% silicon oxide, whereas, magnesium oxide addition up to 2.0 wt.% little influenced to the permittivity. Epoxy matrix-nano-sized silicon oxide composites were more suitable than magnesium oxide for the high performance capacitance.
Department of Electronic Engineering, Sunmoon University, 100 Kalsan-ri, Tangjeoung-myun, Asan, Chungnam 336-708, Korea.
Sang Heon
SH
Lee
Yong
Y
Choi
D004553:Electric Conductivity; D046911:Macromolecular Substances / Q000737:chemistry; D008277:Magnesium Oxide / Q000737:chemistry*; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D013814:Thermal Conductivity
D046911:Macromolecular Substances; D008277:Magnesium Oxide; D012822:Silicon Dioxide