Ionic Conduction of Impurity-Doped β-Alumina Ceramics

This is the authors' abstract. We don't add key points for this paper.

Beta alumina (Na 2 O·11 Al 2 O 3 ) with addition of MgO, NiO, ZnO, CuO and CaO, respectively, together with Na 2 O are sintered. Ionic conduction of Na + and X-ray diffraction of these samples are investigated. Additions of above divalent ions, except for Ca 2+ , increase the amount of Na + in β-alumina, leading to an increase in the ionic conduction of Na + in β-alumina. All divalent ions effective to increase the ionic conduction are components of aluminum spinel. The limiting process of the D.C. ionic conduction of these sintered samples may be the grain-boundary conduction.