The mixed alkali effect in beta-alumina

Authors
Wang, YH Cormack, AN
Citation
Yh. Wang et An. Cormack, The mixed alkali effect in beta-alumina, RADIAT EFF, 151(1-4), 1999, pp. 209
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
RADIATION EFFECTS AND DEFECTS IN SOLIDS
ISSN journal
10420150 → ACNP
Volume
151
Issue
1-4
Year of publication
1999
Database
ISI
SICI code
1042-0150(1999)151:1-4<209:TMAEIB>2.0.ZU;2-P
Abstract
Static lattice and molecular dynamic atomistic computer simulations have be en performed on mixed alkali (Na-K) beta-aluminas. The simulations exhibit the mixed alkali effect, more commonly associated with glasses. The maximum deviation from linearity is seen at 75K/25Na, in accord with experiment. A simple structural explanation for the effect is proposed to be the differe nt site preferences adopted by sodium and potassium in exchanged or substit uted structures.