NOVELTY - Glass solder comprises: aluminum oxide; silicon dioxide; calcium oxide; magnesium oxide; barium oxide; strontium oxide; cesium oxide; sum of barium oxide and strontium oxide; boron trioxide; metal oxides comprising at least one alkaline earth metal oxide comprising zinc oxide and and/or beryllium oxide; metal oxides comprising titanium dioxide, zirconium dioxide and/or hafnium dioxide; sum of aluminum oxide and metal oxides comprising gallium(III) oxide, indium(III) oxide, yttrium oxide, lanthanum oxide and/or dysprosium oxide; and sum of lithium oxide, sodium oxide and potassium oxide.    USE - The glass solder is useful for: useful for high temperature applications; the production of joints, preferably for fuel cells and/or exhaust gas sensors and/or plugs; the production of sintered bodies, and/or films with high temperature resistance; and joining high stretching steels, high chromium containing steels, high chromium containing alloys, and/or aluminum oxide- and/or zirconium oxide-ceramics (all claimed).    ADVANTAGE - The glass solder has: improved thermal expansion coefficient and a glass formation temperature; and excellent resistance against chemical attack by acids, bases, and/or water to provide a long life of the product, with the sealing glass components.    DETAILED DESCRIPTION - Glass solder for high temperature applications, with a thermal expansion coefficient of alpha (20-300) of 6x 10-6 K-1 to 12x 10-6 K-1 and a glass formation temperature of greater than 600 degrees C, comprises: aluminum oxide (13-50 wt.%); silicon dioxide (0 to less than 15 wt.%); calcium oxide (5-45 wt.%); magnesium oxide (0-25 wt.%); barium oxide (0 to less than 25 wt.%); strontium oxide (0-20 wt.%); cesium oxide (0-5 wt.%); sum of barium oxide and strontium oxide (less than 25 wt.%); boron trioxide (0-15 wt.%); metal oxides comprising at least one alkaline earth metal oxide comprising zinc oxide and and/or beryllium oxide (0-5 wt.%); metal oxides comprising titanium dioxide, zirconium dioxide and/or hafnium dioxide (0-20 wt.%); sum of aluminum oxide and metal oxides comprising gallium(III) oxide, indium(III) oxide, yttrium oxide, lanthanum oxide and/or dysprosium oxide (13-55 wt.%); and sum of lithium oxide, sodium oxide and potassium oxide (0 to less than 1 wt.%).