公开(公告)号：US3704093A

公开(公告)日：1972-11-28

申请号：US3704093D

申请日：1970-06-15

Applicant: LITTLE INC A

Inventor： HAGGERTY JOHN S ,  WENCKUS JOSEPH F

IPC: C01B25/06 ,  C22C1/00 ,  C22C1/02 ,  C01G15/00 ,  C01B17/00

CPC classification number: C01B25/06 ,  C22C1/007 ,  C22C1/02 ,  Y10S148/022 ,  Y10S148/064 ,  Y10S148/065

Abstract: METHOD OF FORMING INTERMETALLIC COMPOUNDS AND THE LIKE, PARTICULARLY GROUP III-V AND GROUP II-VI COMPOUNDS. THE REACTANTS ARE PLACED IN A CRUCIBLE AND COVERED WITH AN ENCAPSULANT WHICH IS CAUSED TO FLOW THROUGH AND OVER THE REACTANTS TO SEAL THE SYSTEM PRIOR TO THE TIME THAT A TEMPERATURE IS REACHED WHEN THE VAPOR PRESSURE OF ONE OR MORE OF THE REACTANTS BECOMES APPRECIABLE. A TEMPERATURE GRADIENT MAY BE ESTABLISHED ALONG THE VERTICAL AXIS OF THE CRUCIBLE DURING THE SEALING PERIOD. WHEN THE SYSTEM IS SEALED THE OVERPRESSURE IS RAISED AND THE TEMPERATURE IS INCREASED TO A LEVEL AT WHICH THE REACTION IS COMPLETED. NONCONDENSABLES SUCH AS NITROGEN MAY ALSO BE USED AS REACTANTS.

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