Method of making a cathode from tungsten and iridium powders using a strontium peroxide containing material as the impregnant
This invention relates in general to a method of making a long-life high-current-density cathode and in particular, to a method of making such a cathode from a mixture of tungsten and iridium powders using a strontium peroxide containing material as the impregnant. The general object of this invention is to provide an improved method of making a long life high current density cathode. A more specific object of the invention is to provide such a method in which lower temperatures can be used than were used in S.N. 204,327 for the impregnation of the tungsten-iridium billet. It has now been found that the aforementioned objects can be attained by a method that uses a strontium peroxide-containing material as the impregnant. More particularly, according to the invention, a suitable porous billet of tungsten, or tungsten-iridium, or tungsten-osmium or tungsten-rhodium is impregnated with a strontium peroxide containing material in a hydrogen atmosphere and slowly heated to above 215 C to decompose the strontium peroxide, SrO/sub 2/ to form strontium oxide, SrO, and oxygen, O/sub 2/.
- Research Organization:
- Department of the Army, Washington, DC (USA)
- Assignee:
- Department of the Army, Washington, DC
- Patent Number(s):
- None
- OSTI ID:
- 6427585
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
ALKALINE EARTH METAL COMPOUNDS
ATMOSPHERES
CATHODES
CHALCOGENIDES
CURRENT DENSITY
DISPERSIONS
ELECTRODES
ELEMENTS
FABRICATION
HYDROGEN
IMPREGNATION
IRIDIUM
LOW TEMPERATURE
MATERIALS
METALS
MIXTURES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PEROXIDES
PLATINUM METALS
POROUS MATERIALS
POWDERS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION ELEMENTS
TUNGSTEN