Method for vacuum baking indium in-situ
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorJoseph A. Adamski
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Abstract
A method for producing highly pure indium for subsequent utilization as a reaction component in the synthesis of polycrystalline, indium phosphide which includes the step of heating raw indium under vacuum in an open ended quartz ampoule to a temperature in excess of 850.degree. C. followed by the step of sealing the ampoule while simultaneously maintaining said vacuum within the interior of the ampoule.
Claims3
A process for producing highly pure indium for subsequent utilization as a reaction component in the synthesis of highly pure, polycrystalline, indium phosphide which comprises the steps of:
- A. placing an indium loaded quartz container within one end of an open, elongated quartz ampoule;
- B. placing red phosphorus in the other end of said ampoule;
- C. heating said indium loaded quartz container under vacuum to a temperature and for a period of time sufficient to purify said indium while simultaneously cooling under vacuum said red phosphorus to a temperature below its vaporization point;
- D. sealing said quartz ampoule while simultaneously maintaining a vacuum atmosphere within said ampoule;
- and
- E. cooling said sealed ampoule to room temperature.
Dependencies are inferred from the claim text.