Neutron scattering in Ag + and Na + β-aluminas
Abstract
Na + and Ag + β-alumina for various stoichiometries and for various hydration states have been studied by neutron scattering using incident energy of 0.8 meV with a resolution of 20 μeV in the 200-325° C temperature range. From the weak quasielastic signal (QES) observed for the non- stoichiometric (NS) Ag + β-alumina a translational diffusion constant D t has been estimated at about 10 -5 cm 2 s -1 at 200°C. No such QES has been observed for stoichiometric Ag + and Na + compounds. The dehydration of Na + β-alumina has been evidenced by the disappearance of the broad QES above 300°C; correlatively the low frequency inelastic spectrum of Na + of β-alumina is changed.
- Publication:
-
Solid State Communications
- Pub Date:
- January 1983
- DOI:
- 10.1016/0038-1098(83)90377-0
- Bibcode:
- 1983SSCom..45..203G