GLASS-CONTAINING SEALING COMPOUND FOR SPARK PLUGS Russian patent published in 1996 - IPC

FIELD: internal combustion engines. SUBSTANCE: compound contains silicon oxide, calcium oxide, aluminum oxide, potassium oxide, sodium oxide, zinc oxide, copper oxide, crystal silicon, powder of metal titanium, boron carbide, silicon carbide and titanium dioxide. Percentage of components by mass is: SiO₂ - 24.8- 26.2, CaO - 1.17-1.38, Al₂O₃ - 3.4-7.3, K₂O - 1.9-2.1, Na₂O - 1.17-1.38, ZnO 0.88-1.06, P₂O₅ 0.92-1.12, B₂O₃ - 13.8-16.2, CuO - 10.5-13.86, Si - 8-13, Ti 1-2.5, B₄C - 15-17, SiC 4-6, TiO₂ 3-5. EFFECT: increased functional capabilities. 2 tbl