Failure rate dependence in sodium-sulphur life test cells on electrolyte crystal size assessed by hazard plotting (TM-MS-055)

One of the early beta alumina compositions incorporated in sodium-sulphur cells, doped with 2 wt% magnesia and 0.5 wt% lithia for development of low resistivity and known as Batch 35, was originally fired on a slow schedule that resulted in a coarse microstructure. With one or two exceptions the life...