Na和铝电解质对振动成型TiB_2惰性阴极的渗透  

Penetration of Sodium and Electrolyte into Vibratory Compaction TiB_2 Cathode

作　　者：班允刚[1] 阚洪敏[1] 任必军[1] 石忠宁[1] 王兆文[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《过程工程学报》2007年第3期615-619,共5页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金重点基金资助项目(编号:50334030);辽宁省博士启动基金资助项目(编号:20041010)

摘　　要：采用振动成型的TiB2和石墨分别作为Na和铝电解质渗透实验的阴极材料,在工业铝电解条件下电解5h,考察了Na和铝电解质对其腐蚀渗透情况.XRD分析结果表明,振动成型TiB2阴极的基体中未发现Na或F的单质及化合物,而在石墨阴极中则有NaF和Na3AlF6等物质存在.SEM及EDS分析结果表明,Na,F,Al等元素渗透到TiB2阴极基体中的量极少,渗透到石墨中的量则较多.可见振动成型TiB2阴极能够有效减缓Na和铝电解质的渗透,但并不能完全阻止.The penetration of sodium and electrolyte into the vibratory compaction TiB2 material and graphite material used as cathode of aluminum electrolysis was studied in this work. After 5 h electrolysis, the XRD analysis showed that NaF and Na3AIF6 existed in the graphite cathode, but NaF and Na3A1F6 were not found in the graphite of vibratory compaction TiB2 cathode. The SEM analysis showed that Na, F and AI penetrated slightly into the vibratory compaction TiB2 cathode, much less than that penetrated into the graphite cathode. Vibratory compaction TiB2 cathode can decrease sodium penetration effectively, but can not hinder sodium penetration thoroughly.

关 键 词：振动成型TiB2阴极 NA 铝电解质 渗透 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TF821[金属学及工艺—金属材料]