C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
183/110, 356/121
C04B 38/06 (2006.01) C03C 11/00 (2006.01) H01B 1/08 (2006.01)
Patent
CA 1186887
ABSTRACT OF THE DISCLOSURE Electrically semi-conducting and conducting open celled ceramic networks and methods for producing them are disclosed. The ceramic network is formed by impregnating an organic foam material with a semi-conducting or conducting ceramic composition, and firing the impregnated material to burn out the foam and to vitrify the ceramic. The semi-conducting or conducting ceramic composition may comprise, on a solids basis, from 45 to 80 percent of a lead-free ceramic frit, from 5 to 15 percent of mono aluminum phosphate, from 6 to 45 percent of a silicone resin, from 0.2 to 13.2 percent of a conducting carbon compound, and an organic solvent or water in amount sufficient to form a dispersion having a viscosity ranging from 300 to 3000 centipoises, and, in the latter ease, from 0.5 to 7 percent of a detergent. The electrically semi-conducting or conducting ceramic composition may also comprise, on a solids basis, a modified copper and alumina composition, from 6 to 45 percent of a silicone resin, and an organic solvent or water and detergent to produce a dispersion having a viscosity ranging from 300 to 3000 centipoises. The organic solvent systems and the aqueous systems both constitute dispersions.
442707
Kowalski Charles I.
Nemeth Joseph
Champion Spark Plug Company
Fetherstonhaugh & Co.
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