Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1996-10-03
1998-06-30
Andrews, Melvyn
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 1019, 75 1026, 75 1028, 75612, 420590, C22B 3412
Patent
active
057727244
ABSTRACT:
The present invention provides a method for producing high-purity titanium from titanium sponge obtained by the Kroll process in which a core of the cylindrical lump of titanium sponge obtained with a weight less than 20-30% of that of the cylindrical lump is separated by cutting off from the lump a bottom portion, a top portion and a peripheral portion, and the core is cut by a press into grains of specific size, which are melted into ingot or refined by reaction with iodine. The high-purity titanium thus produced contains less than 300 ppm of oxygen and less than 10 ppm each of iron, nickel, chromium, aluminum and silicon, the balance being titanium and inevitable impurities; or less than 200 ppm of oxygen and less than 1 ppm each of iron, nickel, chromium, aluminum and silicon, the balance being titanium and inevitable impurities. Thus the invention provides titanium materials of very high purity suitable for thin film deposition as wiring of LSIs from titanium sponge obtained by the Kroll process.
REFERENCES:
patent: 34598 (1862-05-01), Shimotori et al.
patent: 5108490 (1992-04-01), Yashimura et al.
patent: 5124122 (1992-06-01), Wojcik
patent: 5196916 (1993-03-01), Ishigami et al.
patent: 5204057 (1993-04-01), Ishigami et al.
patent: 5232485 (1993-08-01), Yoshimura et al.
Inoue Hideaki
Odagiri Masahiro
Andrews Melvyn
Sumitomo Sitix Corporation
LandOfFree
High purity titanium production process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High purity titanium production process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High purity titanium production process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1854498