Sodium and Bath Penetration into TiB ₂ ‐Carbon Cathodes during Laboratory Aluminium Electrolysis

Study on the Electrolysis Expansion of Carbon Cathode in [K₃AlF₆/Na₃AlF₆]-AlF₃-Al₂O₃ Low Temperature Melts

“…As for the phenomena that the increase amplitude of cathode electrolysis expansion decreases from 0.4 A/cm 2 to 0.7A/cm 2 , Domestic and foreign researchers have obtained similar results in pure sodium electrolyte system [11][12][13]. Because the wettability of liquid aluminum to carbon cathode can be improved between 0.4 A/cm 2 to 0.7A/cm 2 , in the process of electrolysis, the surface of cathode may be covered by a flat of aluminum film, thereby preventing the penetration of potassium and sodium in a certain extend, leading to the relative lesser amplitude of cathode electrolysis expansion in this current density region.…”

“…The results from Ratvik' study show that, in sodium cryolite electrolyte system, when the current density is lower than 0.2A / cm 2 and greater than 0.7A / cm 2 , with the increase of the current density, the cathode electrolysis expansion increased gradually, but in 0.2A / cm 2 to 0.7A / cm 2 range, cathode electrolysis expansion tends to be constant, and there is no obvious increase [11]. Xue's research shows that [12], with the increase of current density, depth of sodium penetration into cathode increases gradually, but when the current density is in the 0.3A / cm 2 to 0.5 A / cm 2 or it is greater than 0.7 A / cm 2 , increasing amplitude of penetration depth is very small, exhibiting a platform, with SØrlie [13] and others having the similar findings. In addition, superheating temperature will also inflect electrolysis expansion of cathodes.…”

Cost‐effective suspension formulation for flexible TiB2 tapes

“…1,2 It is suitable for a wide range of applications, from thermal protective systems for leading edges of hypersonic vehicles to battery electrodes. [3][4][5] Common processing routes for UHTCs include dry pressing and hot pressing, which require additional machining to reach complex shapes. Near-net shape fabrication into complex geometries is achieved through colloidal processing that also allows the microstructure to be tailored to produce either highly dense, uniform products, 6,7 or highly porous structures or thin coatings.…”

“…Titanium diboride (TiB 2 ), like many of the ultra‐high temperature ceramics (UHTCs), exhibits high hardness, high thermal conductivity, and low electrical resistivity in addition to a high melting point 1,2 . It is suitable for a wide range of applications, from thermal protective systems for leading edges of hypersonic vehicles to battery electrodes 3–5 . Common processing routes for UHTCs include dry pressing and hot pressing, which require additional machining to reach complex shapes.…”