Lead-free glaze for alumina bodies

Details Lead-free glaze for alumina bodies Lead-free glaze for alumina bodies

C - Chemistry, Metallurgy

03

C

261/16

C03C 8/04 (2006.01)

Patent

CA 1097696

ABSTRACT OF THE DISCLOSURE A high-silica ceramic glaze, having a low co- efficient of thermal expansion, suitable for application to alumina bodies, is disclosed; The glaze consists essentially, by weight percent, of 48 to 54 percent SiO2, from 7 to 11 percent A1203, from 16-1/2 to 20 percent B2O3, from 11 to 14 percent BaO, from 2 to 3 percent CaO, from 2 to 2-1/2 percent ZnO, from 4-1/4 to 5-1/4 percent Na2O, and from 0.4 to 1 percent K2O. Li2O and MgO to the extent of up to about 1/4 percent and 1 percent, respectively, can also be tolerated, as can minor amounts of other impurities.

308580

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