• Acquire
Hide↑
Journals →  Tsvetnye Metally →  2011 →  #1 →  Back

Magnesium, titanium, rare metals, semiconductors
ArticleName Influence of impurities on residual relative electrical resistance of high-purity niobium ingots
ArticleAuthor +Vygovskiy E. V.
Abstract
The results of researching influence of impurities different in their chemical nature on residual relative electrical resistance of niobium have been conduced. The characteristics of niobium ingots, produced in different conditions, of different grades and initial electrolytic powders have been considered. It is noted that the technology of niobium ingots production for ultra-high frequency structures with total content of impurities not more than (1–2) . 10–2 % (mass.) which includes a double electolytic refining of niobium followed by electron-beam melting of the resulting niobium in oil-free vacuum has been developed in “Giredmet” Institute.
keywords Niobium, impurities, hardness of ingots, residual electrical resistance, electrical powder, ultra-high frequency structure.
References

1. Meyerhoff R. W. Fabrication of niobium Rf cavities. J. Appl. Phypp. 1969. Vol. 40, No. 5. pp. 2011–2014.

2. Beall W. T., Meyerhoff R. W. AC energy losses above and below Hc1 in niobium and niobium–25 at.% zirconium. Ibid. pp. 2052–2059.

3. Meyerhoff R. W. Preparation and electrical resistivity of ultrahigh purity niobium. J. Electrochem. Soc. 1971. Vol. 118, No. 6. p. 997.

4. Pyister H. Superconducting cavities. Cryogenicpp. 1976. Vol. 16, No. 1. pp. 17–24.

5. Turneaure J. P., Weissman I. Microwave surface resistance of superconducting niobium. J. Appl. Phypp. 1968. Vol. 39, No. 9. pp. 4417–4427.

6. Turneaure J. P. The status of superconductivity for Rf applications. Proc. 1972 Applied Superconductivity Conf., Annopolis, Mary Lend, May 1–3, New York. 1972. No. 4. pp. 621–630.

7. Standard specification C-103 for niobium E. B. melted. Q. A. Special Products. 1975.

8. Joby F. Ahh. Mines. 1966. Oct.– Nov. pp. 827–841.

9. Vanlaer M., Durand R. Étude économique des différentes methods, d'élaboration du niobium. Rev. Phypp. Appl. 1970. Vol. 5, No. 3. pp. 487–494.

10. Inoyu G. Tugoplavkie metally v novoy tekhnike. Refractory metals in new equipment. Moscow, 1969. pp. 203–212.

11. Aleksandrov B. N., Kovtun G. P., Elenskiy V. A. Fizika nizkikh temperatur. Low-temperature physics. 1979. Vol. 51, No. 6. pp. 598–604.

12. Padamsee H. The technology of production and purification of Nb for microwave superconducting cavities. 2nd Workshop on RF Superconductivity. Geneve : CERN, 1984. July.
Language of full-text russian
Full content Buy
Back