HIGH-TEMPERATURE IONIC-CONDUCTIVITY IN THE TRIVALENT CERAMIC ELECTROLYTES - LAAL11O18 AND LAAL12O18N

Authors
WARNER TE FRAY DJ DAVIES A
Citation
Te. Warner et al., HIGH-TEMPERATURE IONIC-CONDUCTIVITY IN THE TRIVALENT CERAMIC ELECTROLYTES - LAAL11O18 AND LAAL12O18N, Solid state ionics, 92(1-2), 1996, pp. 99-101
Citations number
7
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
92
Issue
1-2
Year of publication
1996
Pages
99 - 101
Database
ISI
SICI code
0167-2738(1996)92:1-2<99:HIITTC>2.0.ZU;2-C
Abstract
LaAl11O18 and LaAl12O18N which adopt the magnetoplumbite type structur e were prepared by high temperature sintering techniques from La2O3, a lpha-Al2O3 and AlN powders. Phase purity was confirmed by powder XRD a nd IR spectroscopy. Impedance data for ceramic samples with Pt electro des revealed an intra-granular ionic (La3+) conductivity with activati on energies E(a)(LaAl11O18) = 2.5 eV and E(a)(LaAl12O18N) = 1.6 eV. At similar to 1540 K their conductivity is comparable to that for Sr-Li- beta-alumina with sigma similar to 3 X 10(-5) S cm(-1).