The influence of SiO2 addition to 2MgO-Al2O3-3.3P(2)O(5) glass

2MgO-Al2O3-3.3P(2)O(5) glasses with increasing amounts of SiO2 are consider ed for sealing applications in solid oxide fuel cells (SOFC). The change in chemical durability under SOFC anode conditions and the linear thermal exp ansion are measured as functions of the SiO2 concentration. Raman spectrosc opy analysis of the glasses reveals no sign of important changes in the gla ss structure upon SiO2 addition. Some increase in glass durability with SiO 2 concentration is reported and its cause discussed. (C) 1999 Elsevier Scie nce B.V. All rights reserved.