Composition dependence of oxide anion conduction in the BIMEVOX family

✍ Scribed by S. Lazure; Ch. Vernochet; R.N. Vannier; G. Nowogrocki; G. Mairesse

• Book ID: 104296326
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 593 KB
• Volume: 90
• Category: Article
• ISSN: 0167-2738
• DOI: 10.1016/s0167-2738(96)00412-2

✦ Synopsis

Partial substitution for vanadium in Bi,V,O,, can lead to the stabilization at room temperature of one of the three polymorphs Q, p, y exhibited by the mother compound. A tentative classification of the BIMEVOX phases based on these structural polytypes is carried out, and a review of the different identified ways to stabilize the Y-type phases, the most performant ones in term of oxide anion conduction, is proposed. The experimental results clearly indicate that the predominant parameter is not the size or the valence state of the dopant, but rather the structural parameter correlated with the ability for the dopant to regularize the diffusion slab between the B&O, sheets in these layered materials.