Development of innovative superfunctional electrical insulating nanocomposite materials

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14217
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: KOZAKO Masahiro 九州工業大学, 大学院工学研究院, 准教授 (80350429)
• Co-Investigator(Kenkyū-buntansha): 三宅 弘晃 東京都市大学, 工学部, 准教授 (60421864)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: ポリマーナノコンポジット / 絶縁材料 / ナノ粒子 / 沿面放電 / 二次電子放出係数 / 量子化学計算 / インパルス放電 / エポキシ樹脂

Outline of Final Research Achievements

Epoxy/silica nanocomposites were prepared and its withstand voltages of impulse creeping discharge in insulating oil were evaluated. As a result, the withstand voltage increases by 10% with 1 wt% addition of nano-silica. On the other hand, it decreases by 10% with 10 wt% addition of nano-silica as compared with the specimen without nano-silica addition. An effect of this improvement might be related to an electronic carrier trap of nano-particles.
From results of the secondary electron emission measurement, it is found that the secondary electron emission coefficient is slightly suppressed in the nano-silica added specimen. From results of quantum chemistry calculations, it is found that nano-particles show a functionality as deep traps. These results may contribute to understand the improvement mechanism of the breakdown strength and the creeping discharge withstand voltage.

Free Research Field

電気絶縁材料，高電圧工学，放電