Specimens of Ba and Sr β-aluminas were synthesized by means of solid-state sintering at 2033 to 2073K, and their conductivities were measured by using alternating-current impedance spectroscopy. The conductivities at 1673K were equal to 2.05 x 10-2 and 4.6 x 10-3S/m for the Sr and Ba aluminas, respectively. An O concentration cell and direct-current polarization methods were used to measure the ionic transference numbers. The values which were obtained by using the 2 methods were almost in agreement at above 1400 and 1673K, for the Sr-alumina and Ba-alumina, respectively. The former tended to have a slightly greater ionic transference number.

Electrical Conductivity and Ionic Transference Number of Sr and Ba β-Aluminas. G.He, T.Goto, T.Narushima, Y.Iguchi: Solid State Ionics, 1999, 124[1-2], 119-24