Title :
Electrical insulating properties of nano-composites according to additive
Author :
Shin, Jong-Yeol ; Jeong, In-Bum ; Choi, Hyun-Min ; Lee, Jong-Yong ; Kim, Gwi-Yeol ; Lee, Choong-Ho ; Hong, Jin-woong
Author_Institution :
Dept. of Car Mechatron., Sahmyook Univ., Seoul, South Korea
Abstract :
The use of a filler material in epoxy composite materials is an essential condition for reducing the unit cost of production and reinforcing the mechanical strength. However, the dielectric strength of insulators decreases rapidly due to interactions between the epoxy resin and filler particles. In contrast to existing composite materials, nano-composite materials have superior dielectric strength, mechanical strength and enduring chemical properties due to an increase in bond strength of the polymer and nanomaterial. It has been reported that nano-fillers provide new characteristics different from properties of the polymer material. In this study, to improve the insulation capability of epoxy resin used in the insulation of a power transformer apparatus and many devices mold. To accomplish this, the addition amount of nano-SiO2 to epoxy resin was changed and the epoxy/SiO2 nano composite materials were made, and the fundamental electrical properties of them were investigated using a physical properties and analysis breakdown test. Using allowable breakdown probability, the optimum breakdown strength for designing electrical apparatus was determined. As the result, it was found out that the electrical characteristics of the nano-SiO2 content specimens were superior to the virgin specimens. The 0.4 [wt%] specimens showed the highest electrical properties among the specimens examined with an allowable breakdown probability of 20%, which indicates stable breakdown strength in insulating machinery design.
Keywords :
bonds (chemical); composite insulating materials; electric breakdown; electric strength; filled polymers; nanofabrication; particle reinforced composites; silicon compounds; SiO2; bond strength; breakdown probability; breakdown strength; breakdown test; dielectric strength; electrical insulating properties; epoxy composite materials; epoxy resin; filler material; mechanical strength; nanocomposites; nanomaterial; polymer material; power transformer apparatus; Additives; Composite materials; Dielectric breakdown; Dielectric materials; Dielectrics and electrical insulation; Electric breakdown; Epoxy resins; Nanocomposites; Polymers; Power transformer insulation; Allowable breakdown probability; Coulomb´s barrier effect; Dielectric strength; Epoxy resin; Nano-composite; Weibull statistics;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-4367-3
Electronic_ISBN :
978-1-4244-4368-0
DOI :
10.1109/ICPADM.2009.5252205