| Title |
A Study on the Thermal Properties of Epoxy/Micro-Nano Alumina Composites, as Mixture of Surface Modified Nano Alumina |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.9.1504 |
| Keywords |
GIS Spacer ; Epoxy Nano-Micro alumina composites ; Thermal properties ; Glass transition temperature ; Coefficients of thermal expansion |
| Abstract |
The aim of this study is to improve properties both glass transition temperature(T_g) and coefficient of thermal expansion(CTE) using epoxy/micro-nano alumina composites with adding glycerol diglycidyl ether (GDE:1,2,3,5g). This paper deals with the effects of GDE addition for epoxy/micro alumina contents (40, 50, 60wt%)+surface modified nano alumina(1_phr) composites. 20 kinds specimen were prepared with containing micro, nano alumina and GDE as a micro composites(10, 20, 30, 40, 50, 60, 70wt%) or a nano/micro alumina composites(1phr/40, 50, 60wt%). Average particle size of nano and micro alumina used were 30nm and 1~2μm, respectively. The micro alumina used were alpha phase with Heterogeneous and nano alumina were gamma phase particles of spherical shape. The glass transition temperature and coefficients of thermal expansion was evaluated by DSC and TMA. The glass transition temperature decreased and coefficients of thermal expansion become smaller with filled contents of epoxy/micro alumina composites. On the other hand, T_g and CTE as GDE addition variation(1,2,3,5g) of epoxy/micro-nano alumina composites decreased and increased respectively. |