Borosilicate glass of greater resistance to chemical attack and applications thereof

A zirconium-containing and lithium-containing borosilicate glass having a resistance to chemical attack and comprising, in % by weight on an oxide basis:

• SiO2 71 to <73% B2O3 7 to 10% Al2O3 6 to 8% Li2O 0.5 to 1.5% Na2O 3 to 7.5% K2O 0 to 6% MgO 0 to 2% CaO 0 to 2% SrO 0 to 3% BaO 0 to 3% ZnO 0 to 3% ZrO2 0.9 to 2% CeO2 0 to 1%, and
• a refining agent in an amount suitable for refining, as needed,
• with the proviso that a total amount of said Li2O and said Na2O and said K2O is from 3.5 to 10.5%, and with the proviso that a total amount of said MgO and said CaO and said SrO and said BaO and said ZnO is from 0 to 3%.

A zirconium-containing and lithium-containing borosilicate glass having a resistance to chemical attack and comprising, in % by weight on an oxide basis:

• SiO2 71 to 72.5% B2O3 7.5 to 10% Al2O3 6 to 8.5% Li2O 0.5 to 1.5% Na2O 3 to 7.5% K2O 0 to 4% MgO 0 to 2% CaO 0 to 3% SrO 0 to 3% BaO 0 to 3% ZnO 0 to 1% ZrO2 0.9 to 2% CeO2 0 to 1%, and
• a refining agent in an amount suitable for refining, as needed,
• with the proviso that a total amount of said Li2O and said Na2O and said K2O is from 3.5 to 10.5%, and with the proviso that a total amount of said MgO and said CaO and said SrO and said BaO and said ZnO is from 0 to 3%.

A zirconium-containing and lithium-containing borosilicate glass having a resistance to chemical attack and comprising, in % by weight on an oxide basis:

• SiO2 71 to 72.5% B2O3 7.5 to 10% Al2O3 6.5 to 8.5% Li2O 0.7 to 1.4% Na2O 3.5 to 7.2% K2O 0 to 4% MgO 0 to 1% CaO 0.5 to 2% ZrO2 0.9 to 2% CeO2 0 to 0.3%, and
• a refining agent in an amount suitable for refining, as needed,
• with the proviso that a total amount of said Li2O and said Na2O and said K2O is from 7 to 9.5%, and with the proviso that a total amount of said MgO and said CaO is from 0.5 to 2%.