EP 1142661 A3 20030528 - Process for preparing composite silver-tin oxide powders and their use for the preparation of contact material
Title (en)
Process for preparing composite silver-tin oxide powders and their use for the preparation of contact material
Title (de)
Verfahren zur Herstellung von Verbundpulvern auf Basis Silber-Zinnoxid und deren Verwendung zur Herstellung von Kontaktwerkstoffen
Title (fr)
Procédé de préparation de poudres composites à base d'argent-oxyde d' étain et leur utilisation pour la préparation de matériaux de contact
Publication
Application
Priority
DE 10017282 A 20000406
Abstract (en)
[origin: EP1142661A2] Production of composite powders based on silver-tin oxide comprises continuously adding a solution of a silver compound and a solution of a reductant in a reaction cycle to a solution of zinc oxide with intensive mixing to precipitate the silver. Preferred Features: The silver compound is silver nitrate, acetate, carbonate, citrate or oxalate. The reductant is ascorbic acid, citric acid, oxalic acid, formic acid or hydroxylamine. In2O3, Bi2O3, CuO, WO3 or MoO3 is contained in the aqueous dispersion of tin oxide.
IPC 1-7
IPC 8 full level
B22F 1/18 (2022.01); B22F 9/24 (2006.01); C22C 32/00 (2006.01); C23C 18/16 (2006.01); H01H 1/02 (2006.01); H01H 1/0237 (2006.01)
CPC (source: EP US)
B22F 1/18 (2022.01 - EP US); B22F 3/12 (2013.01 - US); B22F 9/24 (2013.01 - EP US); C22C 32/0021 (2013.01 - EP US); H01H 1/02376 (2013.01 - EP US)
Citation (search report)
- [A] EP 0369282 A2 19900523 - SIEMENS AG [DE]
- [XY] CHANG H ET AL: "NOVEL METHOD FOR PREPARATION OF SILVER-TIN OXIDE ELECTRICAL CONTACTS", JOURNAL OF HEAT TREATING, SPRINGER VERLAG, NEW YORK, US, vol. 1, no. 2, 1 April 1992 (1992-04-01), pages 255 - 260, XP000277287, ISSN: 0190-9177
- [Y] BEHRENS V ET AL: "AN ADVANCED SILVER/TIN OXIDE CONTACT MATERIAL", PROCEEDINGS OF THE HOLM CONFERENCE ON ELECTRICAL CONTACTS. PITTSBURGH, SEPT. 27 - 29, 1993, NEW YORK, IEEE, US, vol. CONF. 39, 27 September 1993 (1993-09-27), pages 19 - 25, XP000419850
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1142661 A2 20011010; EP 1142661 A3 20030528; EP 1142661 B1 20050824; AT E302662 T1 20050915; DE 10017282 A1 20011018; DE 10017282 C2 20020214; DE 50107166 D1 20050929; US 2001051102 A1 20011213; US 6409794 B2 20020625
DOCDB simple family (application)
EP 01107637 A 20010328; AT 01107637 T 20010328; DE 10017282 A 20000406; DE 50107166 T 20010328; US 82536301 A 20010404