Electrode composition
AssigneeGreat Lakes Carbon Corporation
InventorsDavid E. Ramsey, Lloyd I. Grindstaff
Life of this patent
Estimating the term…
Abstract
Electrodes suitable for the electrolysis of solutions, in particular for the production of aluminum in Hall-Heroult reduction cells, are composed of SnO.sub.2 with various amounts of conductive agents and sintering promoters principally GeO.sub.2, Co.sub.3 O.sub.4, Bi.sub.2 O.sub.3, Sb.sub.2 O.sub.3, MnO.sub.2, CuO, Pr.sub.2 O.sub.3, In.sub.2 O.sub.3, MoO.sub.3.
Claims11
An electrode suitable for the production of aluminum in a Hall cell comprising a homogeneous sintered ceramic body having the composition of 67 to 78% SnO.sub.2, 19 to 30% GeO.sub.2 and from 1 to 3% of an electroconductive oxide selected from the group consisting of Sb.sub.2 O.sub.3, Bi.sub.2 O.sub.3, and MnO.sub.2.
An electrode suitable for the production of aluminum in a Hall cell comprising a sintered ceramic body of homogeneous composition having a composition of from 47 to 79% SnO.sub.2, from 20 to 50% Co.sub.3 O.sub.4 and from 1 to 3% of an oxide selected from the group consisting of Sb.sub.2 O.sub.3, Bi.sub.2 O.sub.3, and MnO.sub.2.
An electrode of homogeneous composition comprising a rutile crystalline ceramic body having a composition of from 47 to 79% SnO.sub.2, from 8 to 25% Co.sub.3 O.sub.4, from 8 to 25% GeO.sub.2, and from 1 to 3% of an oxide selected from the group consisting of Sb.sub.2 O.sub.3, Bi.sub.2 O.sub.3, and MnO.sub.2.
An electrode suitable for the production of aluminum in a Hall cell comprising a homogeneous sintered ceramic body having the composition of from 64 to 79% SnO.sub.2, 15 to 30% GeO.sub.2, 1 to 3% CuO, and from 1 to 3% of an oxide selected from the group consisting of Pr.sub.2 O.sub.3, In.sub.2 O.sub.3, and MoO.sub.3.
An electrode suitable for the production of aluminum in a Hall cell comprising a homogeneous sintered ceramic body having the composition of from 57 to 79% SnO.sub.2, from 9 to 20% GeO.sub.2, from 9 to 20% ZnO, and from 1 to 3% of an oxide selected from the group consisting of Sb.sub.2 O.sub.3, Bi.sub.2 O.sub.3, and MnO.sub.2.
A homogeneous sintered ceramic body suitable for use as an anode in the production of aluminum in a Hall cell comprising SnO.sub.2 in an amount from 47% to less than 80%;
- and when SnO.sub.2 is from 67 to 78%, includes from 19 to 30% GeO.sub.2 and from 1 to 3% of a compound selected from the group consisting of Sb.sub.2 O.sub.3, Bi.sub.2 O.sub.3, and MnO.sub.2 ;
- and when SnO.sub.2 is from 47 to 79%, includes from 20 to 50% Co.sub.3 O.sub.4 or from 8 to 25% Co.sub.3 O.sub.4 and 8 to 25% GeO.sub.2 and from 1 to 3% of an oxide selected from the group consisting of Sb.sub.2 O.sub.3, Bi.sub.2 O.sub.3, and MnO.sub.2 ;
- and when SnO.sub.2 is from 64 to 79%, includes 15 to 30% GeO.sub.2 and 1 to 3% CuO and from 1 to 3% of an oxide selected from the group consisting of Pr.sub.2 O.sub.3, In.sub.2 O.sub.3, and MoO.sub.3 ;
- and when SnO.sub.2 is from 57 to 79%, includes from 9 to 20% GeO.sub.2 and from 9 to 20% ZnO and from 1 to 3% of an oxide selected from the group consisting of Sb.sub.2 O.sub.3, Bi.sub.2 O.sub.3, and MnO.sub.2.
Dependencies are inferred from the claim text.