Refractories and Industrial Ceramics Vol. 47, No. 1, 2006 UDC 606.76:669.713.7 REFRACTORIES AND CARBON CATHODE MATERIALS FOR THE ALUMINUM INDUSTRY A. L. Yurkov Translated from Novye Ogneupory, No. 1, pp. 18 – 21, January, 2006. No complete theoretical analysis of high-melting materi 2.4. Coatings and New Materials for Bottom Blocks - als and related systems with regard for the above three re- Carbon is far from a perfect material for the bottom quirements has ever been conducted. According to thermo- blocks of electrolysis cells operating on the Hall-Heroult dynamic calculations , the isobaric-isothermal potential of principle. A perfect material should meet the following re - interaction between borides and the components of molten quirements : high electrical conductivity; high thermal alumina-based electrolytes at 1100°C is arranged in order of stability; reliable electrical contact with current leads; mini - increasing reactivity as TiB < ZrB < HfB <VB < NbB < 2 2 2 2 2 mum open porosity; good wettability by molten aluminum; TaB < MoB < CrB <WB . The reactivity of transition 2 2 2 2 chemical inertness; high wear resistance; high resistance to metal carbides to aluminum increases in the order TiC < ZrC < intercalation
Refractories and Industrial Ceramics – Springer Journals
Published: Jun 28, 2006
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