Electrical conductivity of Cu/(10NiO-NiFe2O4) cermet inert anode for aluminum electrolysis
来源期刊:中南大学学报(英文版)2007年第5期
论文作者:田忠良 赖延清 李劼 刘业翔
文章页码:643 - 643
Key words:NiFe2O4; NiO; cermet; inert anode; aluminum electrolysis; electrical conductivity
Abstract: Cu/(10NiO-NiFe2O4) cermets containing mass fractions of Cu of 5%, 10%, 15% and 20% were prepared, and their electrical conductivities were measured at different temperatures. The effects of temperature and content of metal Cu on the electrical conductivity were investigated especially. The results indicate that the metallic phase Cu distributes evenly in 10NiO-NiFe2O4 ceramic matrix. The mechanism of electrical conductivity of Cu/(10NiO-NiFe2O4) cermets obeys the rule of electrical mechanism of semiconductor, the electrical conductivity for cermet containing 5% Cu increases from 2.70 to 20.41 S/cm with temperature increasing from 200 to 900 ℃. The change trend of electrical conductivity with temperature is similar with each other and it increases with increasing temperature and content of metal Cu. At 960 ℃, the electrical conductivity of cermet increases from 2.88 to 82.65 S/cm with the content of metal Cu increasing from 0 to 20%.
基金信息:the National Basic Research and Development Program of China