铝电解用NiFe_2O_4-Cu金属陶瓷阳极的初步研究  

Preliminary Study of NiFe_2O_4–Cu Cermet Anodes for Hall Cells

作　　者：秦庆伟[1,2] 张刚[2] 赖延清[2] 贺跃辉[2] 刘业翔[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用教育部重点实验室,湖北武汉430081 [2]中南大学冶金学院,湖南长沙410083

出　　处：《过程工程学报》2006年第z1期18-22,共5页The Chinese Journal of Process Engineering

基　　金：国家高技术研究基金资助项目(编号:2001AA335013)

摘　　要：采用粉末冶金技术制备了NiFe2O4–Cu金属陶瓷惰性阳极,并对其导电性能和腐蚀行为进行了初步研究.研究发现,金属Cu与NiFe2O4陶瓷润湿性差,难以实现致密化,在升温过程中,过低的表观密度能导致金属铜氧化,降低导电性能.在电解过程中,金属铜的耐蚀性好,但存在聚结现象,可能会导致电流分布不均匀,同时陶瓷基体发生非协同溶解.NiFe2O4-Cu cermet electrodes were manufactured and characterized by powder metallurgical technology.The corrosion behavior and electrical resistivity of NiFe2O4-5%Cu cermet anodes for aluminum smelting were investigated.The results showed that metallic Cu phase had poor wetting characteristics to NiFe2O4 ceramic phase.Traditional cold pressing sintering method was inefficient for dense anode fabrication.The low bulk density may lead to the oxidization of metal phase during the anodes heated by the heat from the cell.Scanning electron microscope analysis and metallographic analysis displayed the incongruent dissolution of ceramic matrix and agglomeration of copper.The agglomerated metallic phase may disturb the current distribution.

关 键 词：NIFE2O4 金属陶瓷 惰性阳极 铝电解 

分 类 号：TF821[冶金工程—有色金属冶金]