方鉛鉱に関する1, 2の基礎的性質について

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書誌事項

タイトル別名
  • Some Fundamental Properties of Galena
  • ホウエンコウ ニ カンスル 1 , 2 ノ キソテキ セイシツ ニ ツイテ
  • 示差熱分析および半導体的特性
  • Differential thermal analysis and semiconductivity

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抄録

The authors have investigated on the physical and chemical properties of galena produced from typical lead-zinc mines in Japan. Differential thermal analyses, thermal balance measurements, x-ray study and measurement of electrical properties were carried out. It was found that these properties are influenced by minor impurities. The main results obtained are as follows:<BR>(1) Differential thermal analysis curves showed two exothermic reaction at 770°C and 840°C, and a slight endothermic reaction at 850°-855°C.<BR>(2) According to the thermal balance measurement, weight began to increase at 310°C and changed to decrease at 750°C, a little inflection was observed on the decreasing curves at 850°-900°C.<BR>(3) Besides lead sulfide, lead sulfate, lead oxide and metallic lead were determined in the heated samples by x-ray spectrometer.<BR>(4) Because of minor impurities, exothermic reaction caused by oxidation of disordered samples began at lower temperature than that of ideal sample.<BR>(5) Semiconductivity of galena depends on its minor impurities, especially silver and bismuth.

収録刊行物

  • 日本鑛業會誌

    日本鑛業會誌 75 (856), 917-922, 1959

    一般社団法人 資源・素材学会

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