Electrical resistivity of NiFe2O4ceramic and NiFe2O4based cermets①
来源期刊：中国有色金属学报(英文版)2004年第3期
论文作者：田忠良 赖延清 李劼 张刚 刘业翔
文章页码：421 - 425
Key words：NiFe2O4 cermet; electrical resistivity; inert anode; aluminum electrolysis
Abstract: NiFe2O4 ceramic and NiFe2O4 based cermets, expected to be used as the inert anodes in aluminum electrolysis, were prepared and their electrical resistivities were measured at different temperatures. The effects of temperature and composition on their electrical resistivities were investigated. The results indicate that the electrical resistivities of NiFe2O4 based cermets mainly depend on temperature, resistivity of ceramic matrix, composition and dispersion of the metal phase among ceramic matrix. The electrical resistivity of NiFe2O4 ceramic decreases from 10.094Ω·cm to 0.475Ω·cm with increasing temperature from 573 K to 1 233 K. The electrical resistivities of NiFe2O4 based cermets are greatly lowered, but decrease with increasing the temperature with similar trend compared to that of NiFe2O4ceramic. The resistivities of NiFe2O4 based cermets containing 5% Ni, 5% Cu and 5% Cu-Ni alloy are 0.046 8, 0.066 8 and 0.0532Ω·cm at 1 233 K, respectively, which are all acceptable as inert anode materials compared to that of the current carbon anode used for a luminum electrolysis.
基金信息：the National Key Fundamental Research and Development Program of China
