Production of Thermal Conductive PMMA/BN Electric Insulating Composite Material using Electrostatic Adsorption Method

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  • Use Shohei
    Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology
  • Murakami Yoshinobu
    Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology
  • Muto Hiroyuki
    Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology
  • Kawashima Tomohiro
    Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology
  • Nagao Masayuki
    Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology

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Other Title
  • 静電吸着法を用いた放熱性ポリメタクリル酸メチル/窒化ホウ素コンポジット絶縁材料の作製
  • セイデンキュウチャクホウ オ モチイタ ホウネツセイ ポリメタクリルサン メチル/チッカ ホウソ コンポジット ゼツエン ザイリョウ ノ サクセイ

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Abstract

An electrostatic adsorption method can produce composite materials with an arbitrary structure. To develop a composite material with a higher thermal conductivity and acceptable breakdown strength, a thermal conductive Polymethylmethacrylate (PMMA) / Boron nitride (BN) composite insulating material is produced using an electrostatic adsorption method. The breakdown strength of the PMMA/BN composite as a function of the PMMA particle size showed a peak. It was recognized from the observation of SEM image that the increase of the distance between fillers which leads to increase of breakdown strength, and the increase of the orientation ratio of longer direction on the BN to electric field direction which leads to decrease of breakdown strength. These balances may determine the breakdown strength. On the other hand, the thermal conductivity exhibited the increasing trend with the increase of the PMMA particle size. The increase of the orientation ratio of longer direction on the BN to the thermal conductivity measurement direction may bring to higher thermal conductivity with the increasing PMMA particle size. It was clarified that the electrostatic adsorption method can easily produce the composite material with different properties for different purposes by changing the PMMA particle size.

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