A REVIEW OF THE EXTRACTIVE METALLURGY OF NIOBIUM
BS>The preparation of niobium was attempted by a number of chemical and electrochemical routes. Chemical reduction of oxides and halides such as Nb/sub 2/O/sub 5/, K/sub 2/NbOF/sub 5/, K/sub 2/NbF/sub 7/, and NbCl/sub 5/ was conducted with varying degrees of success. Aqueous electrochemical reduction has not yet yielded a metallic deposit. The electrolysis of molten baths containing K/sub 2/NbOF/sub 5/ or K/sub 2/NbF/sub 7/ produced niobium metal. The more promising methods of preparation for Nb metal at the present time include the reaction of Nb/sub 2/O/sub 5/ with C, the H/sub 2/ and active metal reduction of NbC1/sub 5/, and electrolysis of K/sub 2/NbF/sub 7/- NaC1 melts. (auth)
- Research Organization:
- Horizons, Inc., Cleveland
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-017847
- OSTI ID:
- 4178405
- Report Number(s):
- TID-6100
- Country of Publication:
- United States
- Language:
- English
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