Sintered ceramic body and a method of making a spark plug...

Details Sintered ceramic body and a method of making a spark plug... Sintered ceramic body and a method of making a spark plug...

C - Chemistry, Metallurgy

04

B

C04B 35/583 (2006.01) C04B 35/58 (2006.01)

Patent

CA 2058695

A sintered ceramic body for a spark plug insulator has nitride or oxinite-based ceramic powder with AlN or AlON as a main component. The insulator contains magnesium (Mg), an amount of which ranges from 0.01 wt% to 5.0 wt% when the amount the magnesium (Mg) is calculated by reducing the magnesium (Mg) to its oxidized compound (MgO). The insulator further contains a sintering additive up to 10 wt% selected from the group consisting of alkali-based earth metals and rare-earth metals in which the weight percentage of the sintering additive is calculated by reducing the sintering additive to its oxidized compound.

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