Abstract: Disclosed herein is a spark plug comprising an insulative sleeve. A glaze coating is disposed on the exterior surface of the insulative sleeve. The glaze coating comprises a silicate glass, a phosphorous glass, a borosilicate glass, or a combination of the foregoing glasses wherein the glasses are independently modified with a modifier selected from the group consisting of alkali group metals, alkali earth group metals, aluminum, and a combination of two or more of the foregoing modifiers and further wherein the glaze coating has a glass transition temperature (Tg) of 300 to 1000 degrees Celsius.
Type:
Application
Filed:
May 11, 2012
Publication date:
November 14, 2013
Applicant:
UCI/FRAM GROUP
Inventors:
Ronald Rohrbach, Peter D. Unger, Jeffrey T. Boehler, Jing Zheng