Spark plug insulator for use in internal combustion engine

Details Spark plug insulator for use in internal combustion engine Spark plug insulator for use in internal combustion engine

1994-04-25

1996-04-16

Yusko, Donald J.

Electric lamp and discharge devices

Spark plugs

313123, 313143, H01T 1338, H01T 2102

Patent

active

055085822

ABSTRACT:
In a spark plug insulator for use in an internal combustion engine, a sintered body has boron nitride and a metal oxide, the boron nitride of the sintered body being 80% or greater by weight, and the sintered body having a thermal expansion coefficient of less than 5.0.times.10-.sup.6 /.degree.C. The metal oxide is selected alone or in combination from the group consisting of magnesium oxide, calcium oxide, silicon oxide, boron oxide, yttrium oxide and aluminum oxide.

REFERENCES:
patent: 4970095 (1990-11-01), Bolt et al.
patent: 5283134 (1994-02-01), Sugimoto et al.

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