Molybdenum Powder Elution Behavior to Water

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  • モリブデン粉末の水への溶出試験
  • モリブデン フンマツ ノ ミズ エ ノ ヨウシュツ シケン

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The press process of molybdenum is done without using an organic binder when the molybdenum is manufactured at high temperature used in powder metallurgy. The decrease in the molybdenum ingot density, which was a factor in the yield decrease of the molybdenum product, is occurred because of remaining moisture and the presence of molybdenum oxide in molybdenum metal powder. To clarify the cause of the yield decrease, the uniform distribution process of the rare earth salt by wet doping into molybdenum and the molybdenum elution to water were examined. The dopants provide a unique effect on the thermal-deformation resistance of molybdenum. In solvents of purified water and tap water, the amount of elution of molybdenum was examined as dependence on molybdenum particle sizes and the temperatures of the solvent. Moreover, elution results obtained using alkali and acid water solvents were compared. As a result, it can be suggested that a steady dope manufacturing condition can be obtained by using the metallic molybdenum or MoO2 as the raw powder, as well as by the use of purified water held at a low temperature.

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