| 摘要 |
<p>A method for producing a spark plug, the spark plug comprising a center electrode, a metal shell and an alumina ceramic insulator disposed between the center electrode. and the metal shell, wherein at least part of the surface of the insulator is covered with a glaze layer comprising oxides, the method comprising the steps of: preparing a coated glaze powder so that a surface of each particle of a glaze powder is covered by an elution-suppressing coating layer, the elution-suppressing coating layer suppressing an elution of water soluble component that. is contained in each particle of the glaze powder; preparing a glaze slurry by suspending the. glaze powder in a water solvent; applying the glaze slurry to surface of the insulator so as to form a glaze powder-deposited layer; and baking the glaze powder-deposited layer to the surface of the insulator to form the glaze layer by heating the glaze powder-deposited layer.
</p> |
