TEM Observation of Electrical Tree Paths and Microstructures in Polyethylene

• Hozumi Naohiro

  Yokosuka Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI)

• Okamoto Tatsuki

  Yokosuka Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI)

• Fukagawa Hiromasa

  Yokosuka Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI)

抄録

The starting point of AC electrical trees in polyethylene and the surrounding microstructures were observed by a transmission electron microscope (TEM) for the first time. To minimize the size of tree paths, the authors developed a new apparatus for preparing specimens in which the tree growth was suppressed to less than 10 μm in length. The tree was started from a needle electrode made of carbon-filled polyethylene. The AC tree was a hollow pipe of about 100 nm diameter immediately after its generation. There were constrictions inside the tree, resulting in a corrugated surface. The starting point of the AC tree was a microscopic convex of several tens to one hundred nanometers, which was based on the cohesion of carbon particles of the electrode. The AC tree path was virtually parallel to the lamellae.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 27 (7), 1230-1233, 1988

  社団法人応用物理学会

キーワード

• electrical tree initiation
• dielectric breakdown
• polyethylene
• transmission electron microscope
• lamellar crystal

詳細情報

• CRID: 1573950402131221888
• NII論文ID: 110003908220
• NII書誌ID: AA10457675
• 本文言語コード: en
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