【摘要】 以氧化镁为原料,以熔盐电解法制备了Al-Mg合金.实验过程中Al液为阴极,石墨为阳极,产生出CO2和CO,而不是传统镁电解生产中放出的大量有毒有害物质.研究表明,随着电解时间的延长,Mg在Al中的含量可以逐渐增大,可以达到1%~5%(质量分数),添加KCl可以使MgO在电解质中的溶解度提高30%以上.CaF2可以降低电解质的初晶温度,但同时又增加了电解质的黏度.电流效率在前45 min之内最高可达74.5%,然后随着电解时间的延长下降,甚至在2 h降到40%.更多还原

【Abstract】 Aluminum-magnesium alloys were prepared through molten salt electrolysis from magnesium oxide.In the test,the liquid Al was taken as cathode with graphite as anode to produce CO and CO2 instead of a big amount of toxic or harmful gases released from conventional magnesium electrolysis.It was revealed that the content of Mg in Al increases gradually and up to 1%～5wt% with lengthening electrolyzing time,and the solubility of MgO can be improved by over 30% if 10 wt% KCl is added into electrolyte.CaF2 can lower the initial crystallization temperature of electrolyte,while the viscosity of electrolyte can be increased.The maximum current efficiency comes up to 74.5% within the first 45 min,then it decreases sharply,even below 40% after 2 hours.更多还原