Wetting Characteristics of Galena

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  • 方鉛鉱の濡れの性質について
  • ホウエンコウ ノ ヌレ ノ セイシツ ニ ツイテ

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Abstract

The author have investigated on wetting characteristics of galena produced from Japan by means of spheroidal drop method. Advancing contact angles were affected with roughness and chemical composition of samples. A formation of new crystal on the surface of depressed galena was determined by electron diffraction method, and the wetting characteristics depend on nature of the crystal. The main results obtained are as follows:-<BR>(1) Contact angle depends on roughness of surface, and its value of fresh cleavage is greater than that of emery polished surface.<BR>(2) Contact angle is affected with chemical composition and its value decreases especially with increasing of silver content.<BR>(3) Contact angle of the sample preconditioned in potassium permanganate solution decreases linearly with increasing of concentration of the solution.<BR>(4) Surface of galena was slightly oxidized by potassium permanganate solution, and then manganese oxide hydrate MnO2·(0-1) MnO·nH2O was found on it by means of electron diffraction.

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