Compositions – Electrically conductive or emissive compositions – Free metal containing
Patent
1975-09-29
1977-02-01
Padgett, Benjamin R.
Compositions
Electrically conductive or emissive compositions
Free metal containing
252512, 252516, 252517, 252521, H01B 102, H01B 104, H01C 102, H01C 104
Patent
active
040061060
ABSTRACT:
A self sealable glassy resistor composition for a resistor sealed spark plug consists essentially of 5-40% by weight of at least one of the resistance value stabilizing component selected from the group consisting of oxides of metals of Groups IVb and Vb of the Periodic Table and rare earth metals, ThO.sub.2 and SiC, a water soluble carbonaceous material of saccharides or aliphatic hydrocarbons in such an amount that 0.1-5.0% by weight of carbon value is contained in the final composition, 35-85% by weight of borosilicate glass powder, 5-25% by weight of at least one of metals or alloys thereof, the melting point of which is higher than the glass seal temperature and 2-20% by weight of at least one of metals or alloys thereof, the melting point of which is lower than the glass seal temperature, provided that the total amount of both the higher melting point metals or alloys and the lower melting point metals or alloys is up to 30% by weight. The properties of the self sealable glassy resistor composition can be improved by additionally adding 0.1-20 parts by weight based on 100 parts by weight of the self sealable glassy resistor composition, of at least one of the carbides of Ti, Zr, V, Nb, Ta, Cr, Mo, W, B and Th.
REFERENCES:
patent: 3484284 (1969-12-01), Dates et al.
patent: 3680029 (1972-07-01), Berry
patent: 3875477 (1975-04-01), Fredickson et al.
Sakai Masao
Yoshida Mitsutaka
Lloyd Josephine
NGK Spark Plug Co. Ltd.
Padgett Benjamin R.
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