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研究了在SrCl2-SrF2-BaF2的电解质体系中熔盐电解法制备高浓度Al-Sr合金,采用连续脉冲-计算机法测定电解过程的反电动势并且对反电动势和电流效率的影响因素进行了详细的研究。结果发现:增加阴极电流密度,反电动势随之增加;升高极距,反电动势亦有所增加。延长电解时间,反电动势逐渐升高而电流效率达到73.2%后逐渐下降。加大电流强度,延长电解时间,减少铝基母合金质量,可制得高浓度的Al-Sr合金,合金中锶的质量分数最高可达34.8%。实验表明,只要控制好各项工艺参数,可以生产锶的质量分数在20%以内的任意浓度Al-Sr合金。
The high-concentration Al-Sr alloy prepared by molten salt electrolysis in the electrolyte system of SrCl2-SrF2-BaF2 was studied. The counter-electromotive force of the electrolysis process was measured by the continuous pulse-computer method and the influencing factors of back emf and current efficiency were studied in detail the study. The results show that when the cathode current density is increased, the back electromotive force increases; the pole pitch and back electromotive force also increase. Extend the electrolysis time, the back-EMF gradually increased and the current efficiency reached 73.2% after the gradual decline. Increase the current intensity, extend the electrolysis time, reduce the quality of aluminum-based mother alloy, can be prepared in high concentrations of Al-Sr alloy, strontium alloy mass fraction of up to 34.8%. Experiments show that as long as the control of the various process parameters, can produce strontium concentration within 20% of any concentration of Al-Sr alloy.