OXIDE-ION CONDUCTIVITY OF THE NEW AURIVILLIUS PHASE (BI2O2) (NANB2O6.5)

Authors
PHAM AQ PURI M DICARLO JF JACOBSON AJ
Citation
Aq. Pham et al., OXIDE-ION CONDUCTIVITY OF THE NEW AURIVILLIUS PHASE (BI2O2) (NANB2O6.5), Solid state ionics, 72, 1994, pp. 309-313
Citations number
18
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
72
Year of publication
1994
Part
2
Pages
309 - 313
Database
ISI
SICI code
0167-2738(1994)72:<309:OCOTNA>2.0.ZU;2-U
Abstract
A new Aurivillius phase, (Bi2O2)(NaNb2O6.5), with intrinsic oxygen vac ancies has been synthesized. The average structure is very close to th at of the parent phase (Bi2O2)(CaNb2O7). The new phase displays a disc ontinuous change in the Arrhenius plot of the ionic conductivity versu s temperature. Differential thermal analysis (DTA) confirmed the prese nce of a reversible phase transition at 860 degrees C. At 900 degrees C, the conductivity of (Bi2O2)(NaNb2O6.5) is 10(-2)S cm(-1). At 1000 d egrees C, the Aurivillius phase slowly decomposes to a mixture of phas es with a lower total conductivity.