✦ LIBER ✦

Phase transitions and electrical conductivity of Bi-doped La2Mo2O9oxide ion conductors

✍ Scribed by Voronkova, Valentina ;Kharitonova, Elena ;Krasilnikova, Alexandra

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 304 KB
Volume: 206
Category: Article
ISSN: 0031-8965
DOI: 10.1002/pssa.200925184

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

La~2−x~Bi~x~Mo~2~O~y~ (x = 0, 0.02, 0.03, 0.04, 0.05, 0.06, 0.08, 0.1, 0.16, 0.24, 0.3) ceramic samples have been characterized by X‐ray diffraction, differential scanning calorimetry (DSC) and conductivity measurements in order to assess the dynamics of the transitions between the low‐temperature (α), high‐temperature (β) and metastable (β~ms~) phases. Bi doping to x ≥ 0.05 fully stabilizes the cubic phase, suppressing the β → α phase transition. In addition, DSC results demonstrate that considerable doping levels give rise to a small thermal event between 450 and 500 °C, which has been identified as the β~ms~ → β phase transition between cubic phases with static and dynamic oxygen disorder. In this temperature range, the conductivity of the doped materials experiences a transition from Arrhenius to Vogel–Tammann–Fulcher behaviour. Low bismuth concentrations have a significant effect on the conductivity of La~2~Mo~2~O~9~.

📜 SIMILAR VOLUMES

Anelastic and dielectric studies of La2M

Anelastic and dielectric studies of La2Mo2O9-based oxide-ion conductors

✍ Q.F. Fang; F.J. Liang; X.P. Wang; G.G. Zhang; Z.J. Cheng 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 244 KB

Phase transition associated with the var

Phase transition associated with the variation of oxygen vacancy/ion distribution in the oxide-ion conductor La2Mo2-xWxO9

✍ Li, D. ;Wang, X. P. ;Fang, Q. F. ;Wang, J. X. ;Li, C. ;Zhuang, Z. 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 346 KB

17O NMR in room temperature phase of La2

17O NMR in room temperature phase of La2Mo2O9 fast oxide ionic conductor

✍ Joel Emery; Dominique Massiot; Philippe Lacorre; Yvon Laligant; Kasik Conder 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 380 KB

A room temperature 17 O NMR study of La 2 Mo 2 O 9 , a fast oxide ionic conductor exhibiting a phase transition at 580 • C between a low-temperature a-phase and a high-temperature b-phase, is presented. Four partly overlapping quasi-continuous distributions of oxygen sites are evidenced from 1D magi

Microwave-assisted combustion synthesis

Microwave-assisted combustion synthesis of nanocrystalline La2Mo2O9oxide-ion conductor and its characterization

✍ T. Saradha; S. Muzhumathi; A. Subramania 📂 Article 📅 2007 🏛 Springer 🌐 English ⚖ 191 KB

ChemInform Abstract: Crystal Structure o

ChemInform Abstract: Crystal Structure of La2Mo2O9, a New Fast Oxide-Ion Conductor.

✍ F. Goutenoire; O. Isnard; R. Retoux; P. Lacorre 📂 Article 📅 2000 🏛 John Wiley and Sons ⚖ 34 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

AC impedance and dielectric relaxation s

AC impedance and dielectric relaxation study on the effectsof the excess Pb introduced in La2Mo2O9 oxide-ion conductors

✍ Zhang, G. G. ;Fang, Q. F. ;Wang, X. P. ;Yi, Z. G. 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 235 KB