有機絶縁材料炭化物に結晶の変化に及ぼす形成温度の検討 The Effects of Heating Temperature on Crystal Changes of Carbonized Organic Insulating Materials

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種々の温度で加熱生成した有機絶縁材料炭化物のグラファイト化の程度を明らかにするため,X線解析装置によって結晶構造の解析を行った。また,走査型電子顕微鏡により形態観察を行った。その結果,電気抵抗が大きく変化する温度の前後において,フェノール樹脂には繊維箇所の空洞化が見られたが,その他の樹脂では1000℃まで加熱しても形態的な変化は現れないことが分かった。また,木材やフェノール樹脂では,電気炉による加熱温度が高いほど,炭素の特徴である(002)面の回折ピークがグラファイトの3.354Åに近づくことなどが分かった。<br>(オンラインのみ掲載)

Electric wires and distributing utensils collected at the fire scene may leave the marks showing the phenomenon of tracking, arcing and short circuits that may take place. In cases when the cause of making the marks may be clear, it turns out to be a very important clue for proving the cause of the fire. When an organic material is heated, it forms finally hexagonal crystals called graphite. There are many kinds of the carbons because amorphous carbon varies continuously to graphite. The degree of graphitization could be known by measuring distance between 002-surfaces in the crystal by using X-ray diffraction. The authors carried out the analysis of the crystal structure to clear the degree of graphitization by X-ray diffraction for the carbonized organic insulating materials being heated at various temperatures by an electric heating furnace, and the observation of the shape of the carbonized materials by SEM. <br>The results obtained are summarized as follows: <br>(1) The diffraction peak of carbonized organic insulating materials produced by tracking is closer to 3.354 Å than those of materials carbonized by the electric heating furnace. The influence of artificial additives on the diffraction peak for the materials carbonized by tracking is smaller than those of materials carbonized by the furnace. <br>(2) X-ray diffraction may be useful to decide whether or not the materials collected from the fire scene took part in the process of electrical fire.

収録刊行物

  • 日本火災学会論文集

    日本火災学会論文集 46(1), 27-31, 1997-04-30

    日本火災学会

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各種コード

  • NII論文ID(NAID)
    10002685994
  • NII書誌ID(NCID)
    AN0018688X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05460794
  • NDL 記事登録ID
    4247369
  • NDL 雑誌分類
    ZN1(科学技術--建設工学・建設業)
  • NDL 請求記号
    Z16-105
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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