| 简介 |
The invention relates to an electrode (8, 9) for a spark plug, said electrode being formed from a base material (11) and at least one additive material (12) which is distributed in the base material (11) in a dispersed manner, is incorporated into the base material (11), and is a metal oxide, and characterised by a negative formation enthalpy which is higher than 800 kJ/mol O2. The base material (11) is an Au base material or an Rh base material or pure Au or Rh, and the additive material part (12) amounts to between 5 vol. % and 50 vol. %. Alternatively, Pt base materials or pure Pt are provided as the base material (11), and the additive material part (12) amounts to between 21 vol. % and 50 vol. % for average particle diameters (D50) of the additive material (12) between 5 ?m and 20 ?m, or the additive material (12) consists of at least one metal oxide from the group of rare-earth metal oxides and/or at least one metal oxide from the group containing Al2O3, Y2O3, Sc2O3, CaO, SrO, BaO, and/or at least one mixed oxide, such as spinel, consisting of at least one alkaline earth metal oxide, a rare-earth metal oxide, Al2O3, Y2O3 and/or Sc2O3, the additive material part (12) amounting to between 5 vol. % and 50 vol. %. |
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