Modified copper-aluminum suppressor element

Details Modified copper-aluminum suppressor element Modified copper-aluminum suppressor element

C - Chemistry, Metallurgy

04

B

31/167

C04B 35/44 (2006.01) H01B 1/08 (2006.01) H01B 3/00 (2006.01) H01T 13/41 (2006.01)

Patent

CA 1044006

ABSTRACT OF THE DISCLOSURE An improved ceramic article useful after firing as an electrical suppressor element, especially suitable for use in spark plugs, is disclosed. The suppressor element is a copper-aluminum composition modified with a magnesium, calcium, strontium or barium metal compound. The numerical value of the atom ratio of the article, Image where M represents magnesium, calcium, strontium or barium is from 0.5 to 4. The atom ratio of M to Al is from about 0.5:1 to 2.0:1. The temperature co-efficient of resistance of the suppressor, defined by Image is between about -0.1% and -1.0%/°C.

223738

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