LiF对Na_3AlF_6-K_3AlF_6-AlF_3熔体初晶温度和Al_2O_3溶解度的影响  

Effect of LiF on liquidus temperature and solubility of Al_2O_3 in Na_3AlF_6-K_3AlF_6-AlF_3 melts

作　　者：黄有国[1,2] 田忠良[1] 赖延清[1] 李劼[1] 刘业翔[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083 [2]广西师范大学化学化工学院,桂林541004

出　　处：《中国有色金属学报》2010年第5期903-907,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2005CB623703);国家高技术研究发展计划资助项目(2008AA030503)

摘　　要：采用步冷曲线法测定Na3AlF6-K3AlF6-AlF3-LiF熔体的初晶温度,采用旋转刚玉片质量损失法测定Al2O3在Na3AlF6-K3AlF6-AlF3-LiF熔体中的溶解度。结果表明:当LiF添加量在0～4%范围内时,每添加1%LiF使Na3AlF6-K3AlF6-AlF3熔体的初晶温度降低3～4.7℃,小于Na3AlF6-AlF3熔体中添加LiF后初晶温度的影响;在0～3%的范围内,每添加1%LiF将使Al2O3在Na3AlF6-K3AlF6-AlF3熔体中的溶解度降低0.23%～0.55%。The liquidus temperatures of Na3AlF6-K3AlF6-AlF3-LiF melts were tested by cooling curve,and the solubilities of Al2O3 in Na3AlF6-K3AlF6-AlF3-LiF melts were determined by the mass loss of rotating sintered corundum disc.The results show that the liquidus temperature decreases by 3-4.7 ℃ with increasing LiF by 1% in the content range of 0-4%,the increment is less than that in Na3AlF6 melts.The solubility of Al2O3 in Na3AlF6-K3AlF6-AlF3 melts decreases by 0.23%-0.55% with increasing LiF by 1% in the content range of 0-3%.

关 键 词：AL2O3 LIF Na3AlF6-K3AlF6-AlF3熔体 初晶温度 溶解度 

分 类 号：TF821[冶金工程—有色金属冶金]