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1. (WO1998049356) VALVE METAL COMPOSITIONS AND METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/049356 International Application No.: PCT/US1998/008170
Publication Date: 05.11.1998 International Filing Date: 23.04.1998
Chapter 2 Demand Filed: 10.09.1998
IPC:
B22F 1/02 (2006.01) ,C22C 1/04 (2006.01) ,H01G 9/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
22
CASTING; POWDER METALLURGY
F
WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
1
Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition
02
comprising coating of the powder
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
C
ALLOYS
1
Making non-ferrous alloys
04
by powder metallurgy
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
G
CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
9
Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
Applicants: FIFE, James, A.[US/US]; US (UsOnly)
CABOT CORPORATION[US/US]; 75 State Street Boston, MA 02109-1806, US (AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, CA, CF, CG, CH, CI, CM, CN, CY, CZ, DE, DK, EE, ES, FI, FR, GA, GB, GE, GH, GM, GN, GR, GW, HU, ID, IE, IL, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MC, MD, MG, MK, ML, MN, MR, MW, MX, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW)
Inventors: FIFE, James, A.; US
Agent: FINNEGAN, Martha, Ann; Cabot Corporation 157 Concord Road P.O. Box 7001 Billerica, MA 01821-7001, US
Priority Data:
08/845,73626.04.1997US
Title (EN) VALVE METAL COMPOSITIONS AND METHOD
(FR) COMPOSITIONS ET PROCEDE A BASE DE METAL
Abstract:
(EN) Valve metal articles such as wire, sheet or powder having a second metal, preferably in a peripheral margin, prepared by coating the valve metal with a salt solution of the metal additive and heat treating in the presence of an oxygen getter to remove the oxygen from the valve metal and the anion of the metal salt to form the metal additive. For tantalum wire a preferred second metal is nickel. A preferred oxygen getter is magnesium. Nickel-containing tantalum wire is useful for enhance bonding to sintered pressed tantalum powder pellets in the production of electrolytic capacitors.
(FR) L'invention concerne des articles en métal de valeur, se présentant sous forme de fils, de feuilles ou de poudres comprenant un deuxième métal, de préférence sur leur périphérie. Lesdits articles sont préparés par enrobage du métal de valeur d'une solution de sel constituée de l'additif métallique et par traitement thermique en présence d'un getter à oxygène de sorte que l'oxygène soit éliminé du métal de valeur et de l'anion du sel métallique et que l'additif métallique soit formé. Pour les fils en tantale, le deuxième métal préféré est le nickel. Le getter à oxygène préféré est le magnésium. Un fil en tantale contenant du nickel est utile pour l'amélioration de la liaison à des billes de poudre de tantale comprimées et frittées, dans la production de condensateurs électrolytiques.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)