SPARK PLUG

An object of the present invention is to provide a spark plug which includes, at at least one of a center electrode and a ground electrode, a tip having excellent spark wear resistance in a high temperature environment, thereby having excellent durability. A spark plug includes a center electrode an...

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Bibliographic Details
Main Authors KANEMARU, Tomonori, SUMOYAMA, Daisuke
Format Patent
LanguageEnglish
French
German
Published 22.11.2017
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CASTING
CHEMISTRY
CORONA DEVICES
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
OVERVOLTAGE ARRESTERS USING SPARK GAPS
PERFORMING OPERATIONS
POWDER METALLURGY
SPARK GAPS
SPARKING PLUGS
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:An object of the present invention is to provide a spark plug which includes, at at least one of a center electrode and a ground electrode, a tip having excellent spark wear resistance in a high temperature environment, thereby having excellent durability. A spark plug includes a center electrode and a ground electrode disposed with a gap provided between the center electrode and the ground electrode. At least one of the center electrode and the ground electrode includes a tip which defines the gap. The tip includes a metal base material containing Ir as a main component, and oxide particles containing at least one of oxides having a perovskite structure represented by general formula ABO 3 (A is at least one element selected from elements in group 2 in a periodic table, and B is at least one element selected from metal elements). When a cross section of the tip is observed, an area proportion of the oxide particles is not lower than 1% and not higher than 13%.
Bibliography:Application Number: EP20150752403