成果報告書詳細
管理番号20150000000329
タイトル*平成26年度中間年報 エネルギー・環境新技術先導プログラム 革新的機能性絶縁材料の先導研究
公開日2015/5/27
報告書年度2014 - 2014
委託先名学校法人早稲田大学 国立大学法人名古屋大学 国立大学法人九州工業大学 国立大学法人豊橋技術科学大学 ナガセケムテックス株式会社 富士電機株式会社 一般財団法人電力中央研究所
プロジェクト番号P14004
部署名イノベーション推進部
和文要約
英文要約Title: Leading research for the development of innovative functional insulating materials (FY2014-FY2015) FY2014 Annual Report

(A-1) Development of dispersion technique of nano- and micro-fillers in polymeric resin
 Documentary survey on quantum chemical calculation and molecular dynamics methods for estimating nano-filler dispersion and nano-composite characteristic has been carried out. Preliminary evaluation to determine formulations of master batches has also been conducted. As a preliminary result, fumed silica treated with dimethyldichlorosilane was found to exhibit uniform dispersion in epoxy resin.

(A-2) Determination of best combination of polymeric resin and filler
 To realize uniform dispersion of nano-fillers in resin, documentary survey has been conducted on surface treatment methods. A preliminary experiment on THz absorption spectroscopy has been carried out. For setting up a heating device, details about the temperature region and atmosphere to be studied were decided.

(A-3) Establishment of high density filling method to improve remarkably thermal conductivity and electrical insulation property.
 A preliminary test has been carried out on the nano-filler distribution. The filler distribution in commercially available composites of SiO2 and epoxy resin was quantitatively analyzed by an areal counting method, and found that the fillers were much agglomerated compared with the composites mixed in our laboratory.

(A-4) Creation of nano-composites with remarkably improved electrical insulation property
 Preparation of purchase and buildup has been conducted for experimental equipment necessary for fabricating nano-composites, as well as for measuring electrical insulation characteristics such as creepage discharge, partial discharge and dielectric properties. Study on the design of power supply and measurement system for precise measurements of the surface breakdown voltage of an insulating spacer made of nano-composite or nanomiciro-composite has been carried out. Furthermore, a numerical method capable of calculating the electric field at a triple junction has been developing.

(B-1) Development of a method to predict the permittivity distribution in FGM
A numerical simulation of FGM in consideration of the movement of filler particles (SrTiO3, BN, etc.) in epoxy resin under a centrifugal force has been carried out for a coaxial disk-shape GIS spacer.

(B-2) Establishment of FGM production technique
 Documentary survey has been carried out on production techniques of permittivity-graded FGM applicable to actual equipment with higher performance than the present centrifugal force method. The electrode configuration for estimating the surface electrical insulating properties has been also studied. Various FGM samples with different filler particles (TiO2, SiO2, SrTiO3, or BN) in epoxy resin were fabricated under different centrifugal conditions (acceleration and duration).

(B-3) Investigation on the effects of permittivity distribution in FGM on the control and relaxation of electric field distribution
Electric field distribution along a GIS spacer has been analyzed based on the permittivity distribution in FGM. The maximum electric field intensity was expected to be reduced by 21% compared with that of a conventional spacer with a uniform permittivity. Furthermore, trial design of a GIS or a C-GIS was made and evaluation procedures were discussed.
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