Study on Expansion of Tib_2/C Compound Cathode and Sodium Penetration during Electrolysis

摘要

The expansion of TiB_2/C compound cathode during electrolysis was studied in laboratory. It was found that the expansion of TiB_2/C compound cathode decreases with the increase of TiB_2 content in TiB_2/C. Na had the same penetration mechanism in TiB_2/C cathode as that in normal carbon cathode, In TiB_2/C cathode, Na not only penetrated into TiB_2/C through pores, but also penetrated into TiB_2/C through carbon grains inside TiB_2/C cathode. Meanwhile, Na acted with carbon inside TiB_2/C to produce compound among grains and hence led to grain expansion. It showed that there was linear relation between the depth of Na penetration of the TiBVC cathode and t~(1/2).