CaO掺杂Cu/(NiFe_2O_4-10NiO)金属陶瓷导电性能研究  

Study on the Electrical Conductivity of Cu/(NiFe_2O_4-10NiO) Cermets Doped with CaO

作　　者：田忠良[1,2] 赖延清[1] 张刚[1] 李劼[1] 周科朝[2] 

机构地区：[1]中南大学材料科学与工程博士后流动站,长沙410083 [2]中南大学冶金科学与工程学院,长沙410083

出　　处：《矿产保护与利用》2010年第1期45-48,共4页Conservation and Utilization of Mineral Resources

基　　金：国家高技术发展研究计划项目(2008AA030503);国家重点基础研究发展规划项目(2005CB623703)

摘　　要：研究了掺杂CaO的不同金属含量的Cu/(NiFe2O4-10NiO)金属陶瓷的电导率。试验结果表明:受陶瓷基体NiFe2O4-10NiO电导率随温度变化的影响,对于掺杂或未掺杂CaO的Cu/(NiFe2O4-10NiO)金属陶瓷电导率随温度的升高而提高,并且随材料中金属相Cu含量的增加而提高;当金属相含量Cu由5%提高至17%时,2CaO-Cu/(NiFe2O4-10NiO)金属陶瓷960℃下的电导率由18.24 S.cm-1提高到31.09 S.cm-1。由于CaO掺杂后将导致材料中金属相Cu发生团聚和孤立现象,并在陶瓷基体中多以大颗粒存在,从而降低Cu/(NiFe2O4-10NiO)金属陶瓷的电导率,在900℃时,掺杂CaO后材料的电导率降低约43.3%。The electrical conductivity of Cut/（NiFe2O4 -10NiO） cermets doped with CaO were studied. The results showed that the electrical conductivity of Cu/（NiFe2O4 - 10NiO） cermets doped with CaO or not increased with temperature increasing, which is affected by the electrical conductivity of the ceramic matrix NiFe2O4 -10NiO. At the same time, their electrical conductivities improved with the content of metal phase Cu increasing. The electrical conductivitv of 2CaO - Cu/（ NiFe2O4 - 10NiO） cermets at 960℃ increased from 18.24 S · cm^-1 to 31.09 S ·cm^-1 when the content of metal Cu increased from 5% to 17%. Metal phase Cu reunited or insulated each other and exist as a big grain among the ceramic matrix when Cu/（ NiFe2O4 - 10NiO） cermets doped with CaO. The electrical conductivity of Cu/（NiFe2O4 - 10NiO） cermets doped with 2% CaO at 900℃ decreased about 43.3%.

关 键 词：Cu/(NiFe2O4-10NiO)金属陶瓷 CaO掺杂 电导率 铜含量 铝电解 惰性阳极 

分 类 号：TQ174.758.22[化学工程—陶瓷工业] TF821[化学工程—硅酸盐工业]