冶金工程学院

Materials Science Forum

中文关键字：阴极材料，电解膨胀，电流密度，过热度，铝电解，英文关键字：Cathode material, Electrolysis expansion, Ampere d

Electrolysis expansion of carbon cathodes due to alkali metal penetration in [K3AlF6/Na3AlF6]-AlF3-Al2O3 melts was tested. Effect of ampere density and superheating temperature on the electrolysis expansion was studied. A mathematical model was got to numerically describe electrolysis expansion performance of carbon cathode. The results indicated that K and Na penetrate into carbon cathode from outside to inside. Ampere density and superheating temperature had a great effect on the electrolysis expansion of carbon cathode. With the superheating temperature increasing from 10℃ to 50℃, electrolysis expansion increased from 1.41% to 2.10% gradually. With the ampere density increasing, the increase trend of electrolysis expansion was not linear. When ampere density was lower than 0.4A / cm2 and greater than 0.7A / cm2, cathode electrolysis expansion obviously increased with the increase of ampere density. Meanwhile, cathode electrolysis expansion tended to be constant as the ampere density changed at the range of 0.4A / cm2 to 0.7A / cm2.The results of the mathematical model in this study had a good agreement with the test results. This model would be helpful to accurately describe the anti-penetration performance of K and Na on the carbon cathode.

EI：20131516189284

许鹏飞,胥建

朱军,li linbo,fangzhao

Journal paper

卷：749

期：

页：633

no

2013-03-01