Electrolytic Preparation of Al-Mg-La Master Alloys from MgCl2-KCl- AlF3-(La2O3) Molten Salt

doi:10.12068/j.issn.1005-3026.2016.07.012

Abstract

Abstract: 0.6 wt% of La₂O₃ was dissolved in MgCl₂-KCl-AlF₃ molten salt system (with mass ratio of 41.5∶48.5∶10). Al-Mg-La master alloy was prepared by electrolysis process. Inductively coupled plasma-optical emission spectroscopy (ICP-OES) and X-ray diffraction (XRD) analysis were used to determine the composition and phases of the alloy. The results show that，the current efficiency can reach 86.2%， and the main alloy phases are α-Mg， β- Al₁₂Mg₁₇ and Al₁₁La₃under the electrolysis conditions of 800℃ of electrolytic temperature， 6.92A/cm² of cathode current density， 5.3~5.4V of the cell voltage， and 1 hour of electrolysis time. High cathode current density is helpful to increase the magnesium content in the alloy.

Key words: rare-earth La, Al-Mg-La master alloy, MgCl₂-KCl system, MgCl₂-KCl-AlF₃-La₂O₃ molten salt, Al₁₂Mg₁₇ phase

CLC Number:

TF821

JANG Pok-nam， WANG Zhao-wen. Electrolytic Preparation of Al-Mg-La Master Alloys from MgCl₂-KCl- AlF₃-(La₂O₃) Molten Salt[J]. Journal of Northeastern University Natural Science, 2016, 37(7): 964-968.

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Electrolytic Preparation of Al-Mg-La Master Alloys from MgCl₂-KCl- AlF₃-(La₂O₃) Molten Salt

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