Effect of Temperature and Dwell Time on Phase Formation and Microstructure of β"-Alumina Solid Electrolyte
Powder of β-alumina solid electrolyte with general formula Na0.80Li0.20Al5O8 was prepared by solid state reaction according to the ternary systems Li2O-Na2O-Al2O3. All the calcined powders were heated at different temperatures for 1 h. The XRD results indicate that the β-alumina phase started to form at 1100 °C and these consistent with TG/DTA measurements. At constant calcined temperature of 1100 °C, When the dwell times was varied in range 5 h to 15 h, it was found that powder consists of β-alumina as a majority phase with a tiny amount of β-alumina and the β-alumina phase purity is about 82 wt% for dwell time of 10 h. The microstructures of β-alumina particles were seen as a layered structural arrangement with hexagonal shape and strong agglomeration between these particles are clearly seen.
S. Suttiruengwong and W. Sricharussin
A. Kamonlert et al., "Effect of Temperature and Dwell Time on Phase Formation and Microstructure of β"-Alumina Solid Electrolyte", Advanced Materials Research, Vols. 93-94, pp. 157-160, 2010