G. He et al., SYNTHESIS AND ELECTRICAL PROPERTY MEASUREMENTS OF BA BETA-ALUMINA IN A BAO-MGO-AL2O3 SYSTEM, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 106(11), 1998, pp. 1048-1050
An ionic conductor, Ba beta-alumina, was synthesized in a BaO-MgO-Al2O
3, ternary system by solid state sintering at 2023 to 2073 K. The Ba b
eta-alumina with a composition of BaO :MgO :Al2O3=1 : 1 : 5 was in a s
ingle phase. Its relative density was 96% of the theoretical density.
The electrical conductivity of Ba beta-alumina was 4.6 x 10(-3) S.m(-1
) at 1673 K and the activation energy was 126.82 kJ.mol(-1). The mobil
e ion could be Ba2+ and its ionic transport number was about 0.8 to 0.
9 at 1073 to 1673 K.