Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder shape or size characteristics
Patent
1992-07-31
1994-04-26
Walsh, Donald P.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Powder shape or size characteristics
419 62, 75245, B22F 100
Patent
active
053064623
ABSTRACT:
A method of making a tantalum capacitor of improved specific capacitance (and volumetric efficiency) is described. Short tantalum fibers are precipitated out of a carrier liquid to form a felt, or tumbled to form fiber containing particles, and in either case subsequently bonded so as to form a felt or particles containing the fibers in random orientation in substantially non-aligned array. These particles or felt are heated to bond the fibers together, purify and (optionally) cylindricalize them. The felt or particles can be processed in conventional fashion thereafter to form the capacitor. Cylindricalized fibers and pellets of increased surface area are also described.
REFERENCES:
patent: 2277687 (1942-03-01), Brennan
patent: 3373320 (1968-03-01), Krock et al.
patent: 3742369 (1973-06-01), Douglass
patent: 3827865 (1974-08-01), Douglass
patent: 3976435 (1976-08-01), Klein
patent: 4109060 (1978-08-01), Andersson et al.
patent: 4141719 (1979-02-01), Hakko
patent: 4502884 (1985-03-01), Fife
Fiber Composite Materials Amer. Soc. for Metals, Chapman & Hall Ltd. 1965, pp. 229-231.
Cabot Corporation
Chi Anthony R.
Gwinnell Harry J.
Walsh Donald P.
LandOfFree
Fibrous tantalum and capacitors made therefrom does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fibrous tantalum and capacitors made therefrom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fibrous tantalum and capacitors made therefrom will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1710306