东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (5): 513-516.DOI: -

• 论著 • 上一篇    下一篇

电解Al-Zr母合金的热力学

曹大力;石忠宁;王吉坤;邱竹贤;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;云南冶金集团总公司;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;云南昆明650051;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-05-15 发布日期:2013-06-23
  • 通讯作者: Cao, D.-L.
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2001AA3350101);;

Thermodynamics of electrolytic Al-Zr master alloys

Cao, Da-Li (1); Shi, Zhong-Ning (1); Wang, Ji-Kun (2); Qiu, Zhu-Xian (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China; (2) Yunnan Metallurgical Group, Kunming 650051, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-05-15 Published:2013-06-23
  • Contact: Cao, D.-L.
  • About author:-
  • Supported by:
    -

RichHTML

1

PDF (PC)

571

摘要： 简要介绍了Zr在铝及铝基合金中的作用,提出利用氧化锆、氧化铝直接在电解槽中电解Al-Zr母合金的工艺方案;从热力学角度对该方案进行了分析,并利用Miedema模型对锆在铝中的活度系数进行了计算·结果表明:在活性阳极电解条件下(1223K),锆与铝可以共同析出,锆在铝中的活度系数接近1;氧化锆在电解液中的溶解度约0·55%;可以在电解槽中直接生产锆的质量分数为2%左右的Al-Zr母合金·

关键词: Al-Zr母合金, 电解, 热力学, ZrO2, 活度系数, 溶解度

Abstract: The prominent effect of Zr on Al and Al-based alloys is briefly introduced. The process scheme of manufacturing Al-Zr master alloy by electrolysis of ZrO2 in cryolite-alumina melt cell is put forward. The feasibility of the scheme is analyzed thermodynamically, and the activity coefficient of Zr in Al-Zr master alloys has been calculated by Miedema's model. The results reveal that both Al and Zr can jointly be precipitated and the solubility of ZrO2 in molten cryolite is approximately up to 0.55% and the activity coefficient of Zr in Al-Zr master alloy near to 1 at 1223 K. In addition, the Al-Zr master alloy containing about 2wt% is available to get directly in cell.

中图分类号: