BAS (BaO centre dot Al_2O_3 centre dot SiO_2)-glasses for high temperature applications

摘要

The paper concerns the commercial BAS (BaO centre dot Al_2O_3 centre dot SiO_2)-glass AF45 from the Fa. DESAG, Germany, and reports an investigation to test the suitability as sealing glass for the SOFC. Importantly the crystal-lization behaviour is characterized. A crystallization of the sealing glasses is necessary to fulfil the high requirements for joining. Samples are screen printed films with addition of MgO. The galss AF45 is a slowly crystallizing glass. In general the crystallization rate can be regulated within wide limits by means of MgO addition.