Extractive Metallurgy Division - Single-Crystal Growth and Purification of Tantalum

The American Institute of Mining, Metallurgical, and Petroleum Engineers
D. P. Seraphim J. I. Budnick W. B. Ittner III
Organization:
The American Institute of Mining, Metallurgical, and Petroleum Engineers
Pages:
7
File Size:
581 KB
Publication Date:
Jan 1, 1961

Abstract

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A reliable technique has been developed for producing single crystals of tantalum in the form of small diameter wires. By suitably heat treating these and polycrystal samples, first in an oxygen atmosphere and finally in vacuum, it has been found possible to reduce residual resistivities to 10-3 microhm-cm. The purity of these samples is thus comparable to the purities obtained in zone-refined silver, copper, and aluminum. THE growth and purification of pure single crystals of the transition metals is, in general, difficult. The high melting and annealing temperatures of these metals make it necessary to employ rather special techniques in any crystallization process. In addition, the transition metals show a great affinity for and are easily contaminated by nitrogen, oxygen, and carbon. Recently, however. a number of investigators have been successful in growing,
Citation

APA: D. P. Seraphim J. I. Budnick W. B. Ittner III  (1961)  Extractive Metallurgy Division - Single-Crystal Growth and Purification of Tantalum

MLA: D. P. Seraphim J. I. Budnick W. B. Ittner III Extractive Metallurgy Division - Single-Crystal Growth and Purification of Tantalum. The American Institute of Mining, Metallurgical, and Petroleum Engineers, 1961.

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