Abstract: A lead-free crystal glass composition includes 58 to 64% by weight of SiO2, 0 to 0.5% by weight of Al2O3, a mixture of alkali oxides and alkaline earth oxides including 13.8 to 18% by weight of a mixture of alkali oxides including K2O and Na2O, and 9 to 15% by weight of a mixture of alkaline earth oxides including BaO and SrO, the ratio of the mole percentage of the mixture of alkali oxides to the mole percentage of the mixture of alkaline earth oxides being between approximately 2 and approximately 3, 6 to 10% by weight of ZnO, 0 to 1.20% by weight of Sb2O3, 0 to 0.5% by weight of SO3, 0 to 6.8% by weight of TiO2 and 0 to 6% by weight of La2O3, and 0 to 10% of colouring agents.

Abstract: A glass composition, characterized in that it is selected from the group consisting of: a glass composition (A) with the following molar percentages: 70 to 76% of SiO2, 7 to 8% of B2O3, 5 to 6% of Al2O3, and 10 to 17% of Na2O; and a glass composition (B) with the following molar percentages: 63 to 76% of SiO2, 5 to 12% of ZrO2, 0 to 12% of B2O3, 0 to 2% of La2O3, 11 to 14% of Na2O, and 3 to 5% of K2O. The glass composition can be used in a method for assembling parts, in particular for a method of manufacturing high-temperature electrolyzers (HTEs) or high-temperature fuel cells (SOFCs).

Abstract: The present invention relates to a self-healing vitreous composition containing a particulate vandium additive, to a method for preparing same, and to the use thereof as a self-healing material, in particular for making seals in devices operating at a high temperature such as fuel oils and steam electrolyzers.

Abstract: A glass composition, characterized in that it is selected from the group consisting of: a glass composition (A) with the following molar percentages: 70 to 76% of SiO2, 7 to 8% of B2O3, 5 to 6% of Al2O3, and 10 to 17% of Na2O; and a glass composition (B) with the following molar percentages: 63 to 76% of SiO2, 5 to 12% of ZrO2, 0 to 12% of B2O3, 0 to 2% of La2O3, 11 to 14% of Na2O, and 3 to 5% of K2O. The glass composition can be used in a method for assembling parts, in particular for a method of manufacturing high-temperature electrolyzers (HTEs) or high-temperature fuel cells (SOFCs).

Abstract: The present invention relates to a self-healing vitreous composition containing a particulate vandium additive, to a method for preparing same, and to the use thereof as a self-healing material, in particular for making seals in devices operating at a high temperature such as fuel oils and steam electrolyzers.