SPARK PLUG, SPARK PLUG INSULATOR, AND METHOD OF MANUFACTURING SPARK PLUG

摘要

PROBLEM TO BE SOLVED: To provide a lead-free glaze for a spark plug having a low melting point and high stability in molten state, exhibiting satisfactory adhesion in a cured state to a surface to which the glaze is applied, and securing high mechanical stability of a component of the spark plug to which the glaze is applied. SOLUTION: In a spark plug having a ceramic component, at least part of the surface of the ceramic component is coated with the glaze containing 0.6 to 4 mass % of fluoride and 6 to 11.2 mass % of zinc oxide. COPYRIGHT: (C)2004,JPO