Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1297503 | Solid State Ionics | 2006 | 5 Pages |
Abstract
Defect structure and conductivity behaviour are discussed in the solid solution Bi3Nb1âxYxO7âx(0.0 â¤Â x â¤Â 1.0). Investigations were carried out using a combination of ac impedance spectroscopy and powder X-ray and neutron diffraction. Low temperature conductivity and activation energy both increase as a function of x. The former is attributed to an increase in oxide ion vacancy concentration, whereas the latter is due a redistribution of oxide ion vacancies as determined by neutron diffraction measurements. The defect structures at room temperature and 800 °C are presented. Curvature in Arrhenius plots of conductivity throughout the composition range is associated with a temperature dependent redistribution of oxide ions.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
I. Abrahams, A. Kozanecka-Szmigiel, F. Krok, W. Wrobel, S.C.M. Chan, J.R. Dygas,