Ionic Conduction of Impurity-Doped β-Alumina Ceramics

概要

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Beta alumina (Na_2O・11 Al_2O_3) with addition of MgO, NiO, ZnO, CuO and CaO, respectively, together with Na_2O 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.
社団法人応用物理学会の論文
1972-02-05