EP 0152606 B1 19870909 - CONTACT MATERIAL AND PRODUCTION OF ELECTRIC CONTACTS
Title (en)
CONTACT MATERIAL AND PRODUCTION OF ELECTRIC CONTACTS
Publication
Application
Priority
- DE 3403115 A 19840130
- DE 3428070 A 19840730
Abstract (en)
[origin: US4565590A] The invention relates to a material for electrical contacts, in particular for contact studs in low-voltage switchgear. The material consists of silver, tin oxide and other additives. A material is sought where the overtemperature is lowered as compared with known AgSnO2 material. According to the invention, the further additives are in combination oxides of the metals tantalum (Ta2O5), copper (CuO) and bismuth (Bi2O3). Further the material may contain also tungsten or oxygen containing tungsten compounds. Preferably the material contains 5 to 20 mass % SnO2, 0.1 to 5 mass % Ta2O5 5 mass % CuO, 0.1 to 5 mass % Bi2O3, optionally 0.05 to 3 mass % tungsten and silver as balance. In the method for producing contact studs, the powder metallurgical production of the material is followed by extrusion to a ribbon, from which contact studs can be separated which have an edge-parallel directional structure.
IPC 1-7
IPC 8 full level
C22C 32/00 (2006.01); H01H 1/02 (2006.01); H01H 1/0237 (2006.01)
CPC (source: EP US)
C22C 32/0021 (2013.01 - EP US); H01H 1/02376 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
EP 0152606 A2 19850828; EP 0152606 A3 19850925; EP 0152606 B1 19870909; DE 3466122 D1 19871015; US 4565590 A 19860121
DOCDB simple family (application)
EP 84115754 A 19841218; DE 3466122 T 19841218; US 69371785 A 19850123