Electrode System for a Lamp
An electrode system for lamp engineering has at least one electrode holding rod and an electrode head, which are connected to one another by a soldering filler in a soldering process, the soldering filler being a sintered shaped part consisting of an essentially eutectic alloy.
1 . An electrode system for lamp engineering, having at least one electrode holding rod ( 22 , 24 ) and an electrode head ( 26 , 28 ), which are connected to one another by means of a soldering filler ( 74 ) in a soldering process, characterized in that the soldering filler ( 74 ) is a sintered shaped part ( 76 ) consisting of an essentially eutectic alloy.
2 . The electrode system as claimed in claim 1 , the shaped part ( 76 ) being produced from a molybdenum/ruthenium powder mixture.
3 . The electrode system as claimed in claim 2 , the molybdenum/ruthenium powder mixture having approximately 38 to 48% by weight of ruthenium.
4 . The electrode system as claimed in claim 2 , the molybdenum/ruthenium powder mixture containing 58% by weight of molybdenum and 42% by weight of ruthenium (MoRu42).
5 . The electrode system as claimed in claim 1 , the shaped part ( 76 ) being matched, at least in sections, to the geometry of the electrode holding rod ( 22 , 24 ) and/or the electrode head ( 26 , 28 ).
6 . The electrode system as claimed in claim 1 , the shaped part ( 76 ) having an essentially circular cross section.
7 . The electrode system as claimed in claim 1 , the shaped part ( 76 ) being a soldering disk ( 78 ).
8 . The electrode system as claimed in claim 1 , the shaped part ( 76 ) being introduced into a soldering area ( 72 ) which is delimited, at least in sections, by the electrode holding rod ( 22 , 24 ) and the electrode head ( 26 , 28 ).
9 . A discharge lamp, in particular an HBO® or XBO® high-pressure discharge lamp having an electrode system ( 18 , 20 ) as claimed in claim 1 .
10 . A method for producing an electrode system ( 18 , 20 ) as claimed in claim 1 , having the following steps:
a) introducing the sintered shaped part ( 76 ) into the electrode head ( 26 , 28 ),
b) inserting the electrode holding rod ( 22 , 24 ) into the electrode head ( 26 , 28 ), and
c) soldering the electrode holding rod ( 22 , 24 ) to the electrode head ( 26 , 28 ).
11 . The electrode system as claimed in claim 3 , the molybdenum/ruthenium powder mixture containing 58% by weight of molybdenum and 42% by weight of ruthenium (MoRu42).
12 . The electrode system as claimed in claim 2 , the shaped part ( 76 ) being matched, at least in sections, to the geometry of the electrode holding rod ( 22 , 24 ) and/or the electrode head ( 26 , 28 ).
13 . The electrode system as claimed in claim 3 , the shaped part ( 76 ) being matched, at least in sections, to the geometry of the electrode holding rod ( 22 , 24 ) and/or the electrode head ( 26 , 28 ).
14 . The electrode system as claimed in claim 4 , the shaped part ( 76 ) being matched, at least in sections, to the geometry of the electrode holding rod ( 22 , 24 ) and/or the electrode head ( 26 , 28 ).
15 . The electrode system as claimed in claim 2 , the shaped part ( 76 ) having an essentially circular cross section.
16 . The electrode system as claimed in claim 3 , the shaped part ( 76 ) having an essentially circular cross section.
17 . The electrode system as claimed in claim 4 , the shaped part ( 76 ) having an essentially circular cross section.
18 . The electrode system as claimed in claim 5 , the shaped part ( 76 ) having an essentially circular cross section.
19 . The electrode system as claimed in claim 2 , the shaped part ( 76 ) being a soldering disk ( 78 ).
20 . The electrode system as claimed in claim 3 , the shaped part ( 76 ) being a soldering disk ( 78 ).