Composite cathode
US4396482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1981 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Oct 1, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/666
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An improved electrolytic cell is provided for production of a metal such as aluminum by electrolysis of a compound of the metal in a solvent or bath such as molten salt. Electrolysis is carried out by passing a current from an anode to a cathode between which the solvent bath is situated. The cathode comprises a base cathode and cathode extension surfaces comprising graphite and at least 90% refractory hard metal such as titanium diboride. The cathode extension surfaces are produced from a mixture comprising at least 90% refractory hard metal and a carbonaceous binder with little or substantially no particulate carbonaceous material and graphitizing said mixture above 2350.degree. C. to graphitize the carbonaceous material therein to exhibit the graphitic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.