铜镍合金/NiFe_2O_4-10NiO复合陶瓷惰性阳极的制备及其性能研究  

PREPARATION AND PERFORMANCE STUDY ON Cu-Ni ALLOY /NiFe_2O_4-10NiO COMPOSITE CERAMIC INERT ANODE

作　　者：罗伟红[1] 宋宁[1] 谢刚[1,2] 姚云[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]云南冶金集团总公司技术中心,昆明650031

出　　处：《矿冶》2013年第2期84-87,共4页Mining And Metallurgy

基　　金：云南云铝涌鑫铝业资助项目

摘　　要：以NiO、Fe2O3和铜、镍为主要原料,采用高能球磨—固相烧结法,制备出Cu-Ni-NiFe2O4-10NiO和(Cu-Ni合金)/NiFe2O4-10NiO金属陶瓷试样,研究了试样的物相组成、显微结构以及其体积密度、静态热腐蚀率、抗热震性和电导率。研究表明,合金粉的添加能够改善金属相的溢出现象并提高材料的物化性质。与Cu-Ni-NiFe2O4-10NiO金属陶瓷相比,合金粉均匀的弥散于陶瓷相中,减小了晶界间的势垒作用,使载流子更易通过晶界从而提高了试样的导电率,850℃时试样的电导率为60.7 S/cm;增大了材料的致密度;耐高温和抗冰晶石熔盐静态腐蚀率较低,平均腐蚀率降为12.62 mm/a;较大提高了试样的抗热震性。With NiO, Fe2O3 and Cu, Ni as main raw material, adopting high-energy ball mill-solid phase sintering method, Cu-Ni- NiFe204-10NiO and Cu-Ni alloy/NiFe204-10NiO metal ceramic sample is prepared. The physi- cal phase composition, microstructure and volume density, static thermal corrosion rate, thermal shock resistance and electrical conductivity of the sample are studied. The results show that the addition of alloy powder can improve metal phase overflow phenomenon and improve the physicochemical properties of the material. Compared with Cu-Ni- NiFe2O4-10NiO metal ceramics, alloy powder is evenly embedded in the ceramic phase, which can reduce the potential barrier between grain boundary effect, make carriers more likely going through the grain boundary and improve the sample conductivity with measured conductivity of the sample 60. 7 S/cm at 850 ℃ ; increases the material density; while the high temperature resistant and cryolite molted salt resistance static corrosion rate is lower with average corrosion rate dropping 11.32 mm/a; and improves thermal shock resistance of the sample as well.

关 键 词：(Cu-Ni合金) NiFe2O4金属陶瓷 静态热腐蚀率 抗热震性 电导率 

分 类 号：TG14[一般工业技术—材料科学与工程]