BAS (BaO Al2O3 SiO2) glasses for high temperature applications

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