Patent ID: 8349750

Claim:
A glass-metal bond comprising a metal or metal alloy and a glass tube bonded to the metal or to the metal alloy, wherein said glass tube consists of a glass containing the following ingredients in the following amounts: SiO 2 72-80 wt % B 2 O 3 4-<6 wt % Al 2 O 3 2-5 wt % Na 2 O 4-7 wt % K 2 O 0-3 wt % CaO 2.5-8 wt % MgO 0-2 wt % BaO 0-4 wt % TiO 2 0-5 wt % CeO 2 0-2 wt % Fe 2 O 3 0-0.1 wt % F 0-2 wt %; and wherein a ratio of a sum total amount of Al 2 O 3 and B 2 O 3 in mol % to a sum total amount of MgO, CaO and BaO in mol % in the glass is less than 5.