Highly pure titanium and process for producing the same

Details Highly pure titanium and process for producing the same Highly pure titanium and process for producing the same

1987-05-20

1988-12-27

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 1013, 75 1064, 75 65EB, C22B 3412, C22B 922

Patent

active

047938544

ABSTRACT:
Disclosed is a highly pure titanium which comprises containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium.
Disclosed is also a process for preparing the above highly pure titanium which comprises melting a crude titanium obtained by molten salt electrolysis, in a high vacuum of 5.times.10.sup.-5 mbar or less.

REFERENCES:
patent: 2819158 (1958-01-01), Johnston
patent: 2878008 (1959-03-01), Ishizuka
patent: 3024102 (1962-03-01), Brown
patent: 3406056 (1968-11-01), Albert et al.
J. Appl. Phys., vol. 51, No. 1, Jan. 1980; pp. 342-349; S. P. Murarka and D. B. Fraser; "Thin Film Interaction Between Titanium and Polycrystalline Silicon".
Journal of Metals, Dec. 1984, pp. 39-47; H. B. Bomberger and F. H. Froes; "The Melting of Titanium".
Chemical Abstract, vol. 96, 1982, p. 264, Abstract No. 730011w.
Chemical Abstract, vol. 106, 1987, p. 298, Abstract No. 181070y.
Materials for Rare Metal Symposium, Jul. 1986, p. 28.

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