Vitreous or glass-ceramic jointing material

摘要

Vitreous or glass-ceramic jointing material which has a coefficient of thermal expansion (α(20-750) of ¥ 7 x 10-6 K-1 and is free of BaO and SrO and contains (in mol% on an oxide basis): where R2O3 is an oxide selected from the group of Ga2O3, In2O3, Dy2O3 and Yb2O3. The material is suitable for producing joint connections between chromium--containing alloys or chromium-containing steels and between ceramics such as alumina and scandium-stabilised zirconium oxide.