Zn末の処理による化学反応活性の変化について

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書誌事項

タイトル別名
  • On the Chemical Reactivity of Zn Powber Subjected to Various Kinds of Treatments (On the Reactivity of Zn Powder, 7th Report)
  • Znマツ ノ ショリ ニ ヨル カガク ハンノウ カッセイ ノ ヘンカ ニ ツイテ

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抄録

By heating in vacuo, the reactivity (the rate of H2 evolution in HCl) of distilled Zn powder (D-Zn) increases slightly, while that of the high-active electrolytic Zn powder (E-Zn) decreases nearly to that of D-Zn, inspite of only 10 to 20 per cent decrease in the specific surface area by possible sintering. This enormous decrease in activity is accompanied by the decrease in the X-ray diffraction broadening in {103}, corresponding to decrease in the degree of crystal imperfection. An attempt to increase the reactivity by grinding, or to diminish the crystal imperfection by exposing to ultrasonic waves has been unsuccessful. It was found that the reactivity of Zn powder is independent of the quantity that has already dissolved, indicating that the crystal imperfection prevails homogeneously throughout the Zn particle. The observed slight change in reactivity of Zn powder on heating or on dissolving the surface layer seems to have much to do with the surface film that has been formed in air and not necessarily with the crystal imperfection limited to the surface.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 23 (9), 542-545, 1959

    公益社団法人 日本金属学会

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