Method of applying a coating to a spark plug insulator
AssigneeFram Group IP LLC
InventorsJing Zheng, Prabhu Megharaj, Jeffrey T. Boehler
Life of this patent
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Abstract
A method of applying a coating to a spark plug insulator comprises the steps of forming a slurry solution and applying the slurry solution as a first coating to an insulative sleeve configured for use in a spark plug. The method further includes the step of heat treating the insulative sleeve to a temperature of between about 500 degrees Celsius and about 1000 degrees Celsius for between about 10 minutes and about 2 hour(s). Still further, the method includes the step of applying a second coating overlying at least a portion of the first coating, wherein the second coating comprises an organic binder.
Claims18
A method of applying a coating to a spark plug insulator, the method comprising the steps of:
- forming a slurry solution;
- applying the slurry solution as a first coating to an insulative sleeve configured for use in a spark plug;
- heat treating the insulative sleeve to a temperature of between about 500 degrees Celsius and about 1000 degrees Celsius for between about 10 minutes and about 2 hours;
- and
- applying a second coating overlying at least a portion of the first coating, wherein the second coating comprises an organic binder.
A method of applying a coating to a spark plug insulator, the method comprising the steps of:
- forming a slurry solution;
- drying the slurry solution to form a solid mixture;
- heat treating the solid mixture to a temperature of between about 500 degrees Celsius and about 1000 degrees Celsius for between about 10 minutes and about 2 hours;
- grinding the heated solid mixture into a powder;
- dispersing the powder into an aqueous suspension;
- and
- applying the aqueous suspension to a spark plug insulator.
A method of applying a coating to a spark plug insulator, the method comprising the steps of:
- dry mixing two or more tri-metal salts to form a dry mixture;
- heat treating the dry mixture to a temperature of between about 500 degrees Celsius and about 1000 degrees Celsius for between about 10 minutes and about 2 hours;
- grinding the heated solid mixture into a powder;
- dispersing the powder into an aqueous suspension;
- and
- applying the aqueous suspension to a spark plug insulator.
Dependencies are inferred from the claim text.