摘要
The effects of BaO addition on the phase composition,relative density and electric conductivity of xCu/10NiO-NiFe2O4 (x=5,10) cermets were studied,which were prepared with cold isostatic pressing-sintering process.The results show that the relative densities of 5Cu/10NiO-NiFe2O4 cermet doped with 1% BaO (mass fraction) and 10Cu/10NiO-NiFe2O4 cermet doped with 1% BaO sintered at 1 473 K in nitrogen atmosphere,are increased by about 9.86% and 9.75% compared with the undoped BaO cermets,respectively.And the electric conductivities 22.79 S/cm of 5Cu/10NiO-NiFe2O4 cermets adding 1% BaO and 23.10 S/cm of 10Cu/10NiO-NiFe2O4 cermets adding 1% BaO are obtained,which are 2.21 times and 1.47 times of those of undoped samples,respectively.Moreover,the 10Cu/10NiO-NiFe2O4 cermets doped with 1% BaO have a maximum σ0 of 58.91 S/cm and electric conductivity of 23.10 S/cm at 1 233 K.Maybe low melting-point phases of BaFe2O4 and Ba2Fe2O5 have an excellent electric conductivity in xCu/10NiO-NiFe2O4 (x=5,10) cermets at 1 233 K.
The effects of BaO addition on the phase composition, relative density and electric conductivity of xCu/10NiO-NiFe2O4 （x=5, 10） eermets were studied, which were prepared with cold isostatic pressing-sintering process. The results show that the relative densities of 5Cu/10NiO-NiFe2O4 cermet doped with 1% BaO （mass fraction） and 10Cu/10NiO-NiFe2O4 cermet doped with 1% BaO sintered at 1 473 K in nitrogen atmosphere, are increased by about 9.86% and 9.75% compared with the undoped BaO cermets, respectively. And the electric conductivities 22.79 S/cm of 5Cu/10NiO-NiFe2O4 cermets adding 1% BaO and 23.10 S/cm of 10Cu/10NiO-NiFe2O4 cermets adding 1% BaO are obtained, which are 2.21 times and 1.47 times of those of undoped samples, respectively. Moreover, the 10Cu/10NiO-NiFe2O4 cermets doped with 1% BaO have a maximum σ0 of 58.91 S/cm and electric conductivity of 23.10 S/cm at 1 233 K. Maybe low melting-point phases of BaFe2O4 and Ba2Fe2O5 have an excellent electric conductivity in xCu/10NiO-NiFe2O4 （x=5, 10） cermets at 1 233 K.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第5期1134-1138,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(2005CB623703) supported by the National Basic Research Program of China
Project(50721003) supported by the National Natural Science Fund for Innovation Group of China
关键词
掺合料
BAO
铝电解
电子导电性
相对密度
Cu/10NiO-NiFe2O4 cermet
BaO
inert anode
aluminum electrolysis
electric conductivity
relative density
