Glass with high proportion of zirconium-oxide and its uses

Details Glass with high proportion of zirconium-oxide and its uses Glass with high proportion of zirconium-oxide and its uses

C - Chemistry, Metallurgy

03

C

C03C 3/087 (2006.01) C03C 3/093 (2006.01) C03C 3/095 (2006.01) C03C 4/20 (2006.01) C03C 13/00 (2006.01)

Patent

CA 2361147

The invention relates to a glass containing a high proportion of zirconium- oxide, with the following composition (based on the weight percent of oxide): SiO2 54 - 72; Al2O3 0.5 - 7; ZrO2 ~10 - ~18; B2O3 0 - ~5; Na2O 2 - ~10; K2O 0 - 5; with Na2O + K2O 2 - ~10; CaO 3 - 11; MgO 0 - 10; SrO 0 - 8; BaO 0 - 12; with CaO + MgO + SrO + BaO ~5 - 24; La2O3 0 - 6; TiO2 0 - 4. The glass displays a high degree of chemical stability.

Verre à haute teneur en oxyde de zirconium comprenant les composants suivants (en pour-cent en poids sur la base de l'oxyde): SiO¿2? = 54 - 72; Al¿2?O¿3? = 0,5 - 7; ZrO¿2? = > 10 < 18; B¿2?O¿3? = 0 - < 5; Na¿2?O = 2 - < 10; K¿2?O = 0 - 5; Na¿2?O + K¿2?O correspondant à 2 - < 10; CaO = 3 - 11; MgO = 0 - 10; SrO = 0 - 8; BaO = 0 - 12; CaO + MgO + SrO + BaO correspondant à > 5 - 24; La¿2?O¿3? = 0 - 6; TiO¿2? = 0 - 4. Ce verre présente une grande résistance chimique.

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