Study of barium phosphate proton conducting glasses with MgO addition

Abstract

The study of glasses in the series (35-x)BaO: 65P2O5: x MgO has been carried out. The protonic conductivity is observed to increase with addition of MgO up to 20 mol% and decreases beyond this composition. The addition of Mg2+ ions make the glass structure more open and increase the hopping of H+ ions. This is supported by the decrease in density with addition of MgO. The increase in Tg and Decrease in CTE with addition of MgO has been observed. The results have been explained on the basis of stronger bonding between Mg2+ and non-bridging oxygen. Overall, it is observed that the addition of MgO improves the stability and enhance the protonic conductivity of Barium Phosphate Glasses. © 2009 IOP Publishing Ltd.