CuO对金属陶瓷惰性阳极微观结构及性能的影响  

Effect of CuO on microstructure and properties of cermets inert anodes

作　　者：席锦会[1,2] 吉喆[2] 葛世荣[1] 强颖怀[2] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]中国矿业大学材料科学与工程学院,江苏徐州221116

出　　处：《中国矿业大学学报》2011年第1期157-161,共5页Journal of China University of Mining & Technology

基　　金：江苏省博士后科研计划项目(0702058C);中国矿业大学科技基金项目(2006A050)

摘　　要：为了改善金属相对陶瓷相的润湿,充分发挥金属相的作用,在合成Ag质量分数为10%的Ag/NiFe2O4金属陶瓷过程中加入质量分数为10%的SnO2（与NiFe2O4形成复合陶瓷基体）和0~5%CuO（作为添加剂）.采用粉末冶金法制备复合氧化物基的金属陶瓷惰性阳极,原料经混料、成型后在1 200℃下烧结6 h,制备成铝电解用惰性阳极.研究了CuO对金属陶瓷微观结构以及性能的影响.结果表明：在加入SnO2的基础上,掺杂添加剂CuO可以改善Ag与陶瓷相的润湿性,Ag分布均匀且部分由球状变为长条状,同时试样的电导率有了大幅度提高.适量的CuO还可以促进烧结,提高试样的致密度.当CuO质量分数为4%时试样的性能最好.In order to improve the wettability between metallic phase Ag and ceramics phase,the 10%SnO2（as ceramics matrix） and 0%~5%CuO（as additive） were added into raw materials-powders of NiO and Fe2O3 in the process of synthesizing Ag/NiFe2O4＋SnO2 cermets containing 10%Ag.The raw materialswere mixed,then molded and sintered at 1 200 ℃ for 6 h.The effect of CuO on microstructure and properties of cermets was studied.The results show that when the additive CuOwas added,most metal phase is strip due to the improved wettability between metallic phase Ag and ceramics phase.At the same time,the conductivity of the samples is improved remarkably.The proper content of CuO could increase the density of samples because CuO could promote sintering.When the mass percent of CuO is 4%,the property of sample is the best.

关 键 词：金属陶瓷 惰性阳极 添加剂 润湿性 导电性 

分 类 号：TF777[冶金工程—钢铁冶金]