Abstract: The contact material in particular for contacts in low-voltage switches consists of silver and further active components. In accordance with the invention, iron (Fe) in proportions of between 1 and 50% by weight and rhenium (Re) in proportions of between 0.01 and 5% by weight are present in combination as active components. The manufacture of the material and the fabricating of the contacts can be effected by methods of powder metallurgy with inclusion of molding or extrusion techniques, the active components being used in the form of separate powders, as fusible alloy or as mechanically alloyed powder.

Abstract: In a contact material, there is present in addition to silver, at least one higher melting point metal, metal alloy or metal compound. According to the invention, the material contains in addition to silver (Ag), at least iron (Fe) and/or titanium (Ti) in percent by weight of from 2 to 50%. Optionally, nitrides, carbides and/or borides of the metals titanium, zirconium and/or tantalum may also e present. It has been found that in their contact property spectrum such materials are largely equivalent to the material AgNi10. Thus the latter contact material can be replaced completely.

Abstract: Sinter materials having the constitution AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO produced from an intraoxidized alloy powder have added thereto bismuth zirconate and/or bismuth titanate in parts by weight of preferably between 0.1 and 5%. For the production of these materials, bismuth zirconate and/or bismuth titanate is added as a separate powder to the intraoxidized alloy powder of AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO. With such a contact material, the excess temperature behavior in motor contactors is significantly improved.

Abstract: Sinter contact materials produced from an intraoxidized alloy powder having the constitution AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO have added thereto at least zirconium oxide and optionally additionally bismuth oxide in parts by weight of preferably between 0.1 and 5%. For the production of these materials, zirconium oxide power and optionally additionally bismuth oxide powder is added to the intraoxidized alloy powder AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO. With such a contact material, the excess temperature behavior in motor contactors is improved.

Abstract: Contact materials based on AgSnO.sub.2 and having Bi.sub.2 O.sub.3 and CuO as further metal oxide additives were previously disclosed. In these materials the total content of all metal oxides was supposed to be between 10 and 25% by volume with the SnO.sub.2 share equal to or greater than 70% by volume of the total amount of oxide.According to this invention the quantity of SnO.sub.2 is kept smaller than 70% by volume; specifically at about 65%, but in any case equal to or greater than 50%. The SnO.sub.2 weight content is to be in the 4% to 8% range and the weight percentage ratio of SnO.sub.2 to CuO is to be between 8:1 and 12:1.In the associated production process, either Bi.sub.2 O.sub.3 powder is purposely admixed to an internally oxidized alloy powder (IOAP) in an additional operation, a grain restructuring with locally different Bi.sub.2 O.sub.3 concentrations occurring in the structure after sintering and compacting.

Abstract: Contact materials based on AgSnO.sub.2 and having Bi.sub.2 O.sub.3 and CuO as further metal oxide additives were previously disclosed. In these materials the total content of all metal oxides was supposed to be between 10 and 25% by volume with the SnO.sub.2 share equal to or greater than 70% by volume of the total amount of oxide.According to this invention the quantity of SnO.sub.2 is kept smaller than 70% by volume; specifically at about 65%, but in any case equal to or greater than 50%. The SnO.sub.2 weight content is to be in the 4% to 8% range and the weight percentage ratio of SnO.sub.2 to CuO is to be between 8:1 and 12:1.In the associated production process, either Bi.sub.2 O.sub.3 powder is purposely admixed to an internally oxidized alloy powder (IOAP) in an additional operation, a grain restructuring with locally different Bi.sub.2 O.sub.3 concentrations occurring in the structure after sintering and compacting.

Abstract: 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 AgSnO.sub.2 material. According to the invention, the further additives are in combination oxides of the metals tantalum (Ta.sub.2 O.sub.5), copper (CuO) and bismuth (Bi.sub.2 O.sub.3). Further the material may contain also tungsten or oxygen containing tungsten compounds. Preferably the material contains 5 to 20 mass % SnO.sub.2, 0.1 to 5 mass % Ta.sub.2 O.sub.5 5 mass % CuO, 0.1 to 5 mass % Bi.sub.2 O.sub.3, 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.