Paper Title:
Influence of Sintering on Electrical Properties and Phase Transition of La2Mo2O9
  Abstract

High ionic conductivity ceramics have potential technological applications in chemical sensors, ceramic permeable membranes, oxygen pumps, and solid oxide fuel cells. Recently ionic conductivity values as high as those of doped zirconia solid solutions have been found in a lanthanum molybdate compound. The high ionic conductivity of this compound, La2Mo2O9, is obtained at temperatures above the structural phase transition temperature (~580 °C). In this work the La2Mo2O9 ceramic material was prepared by the polymeric precursor technique and sintered at several dwell temperatures and soaking times to study the effect of sintering conditions on phase transition. It was found that there is a strong dependence of phase transition on the sintering profile. At 950 °C the phase transition is suppressed for short soaking times, whereas it is observed to occur for longer times. Moreover, the relative magnitude of conductivity is also dependent on the sintering conditions. The main conclusion is that the phase transition in La2Mo2O9 is particle sizedependent.

  Info
Periodical
Materials Science Forum (Volumes 530-531)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
520-525
DOI
10.4028/www.scientific.net/MSF.530-531.520
Citation
R.A. Rocha, E.N.S. Muccillo, "Influence of Sintering on Electrical Properties and Phase Transition of La2Mo2O9", Materials Science Forum, Vols. 530-531, pp. 520-525, 2006
Online since
November 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Xiao Ya Li, Yun Yu, Dong Li Wang, Li Dong Chen
Abstract:[Ca2(Co0.65Cu0.35)2O4]0.624CoO2 polycrystalline samples were prepared using sol-gel method followed by spark plasma sintering....
805
Authors: Min Zhou, Jing Feng Li, Jing Liu
Abstract:The Bi2Te3 compound was synthesized by mechanical alloying (MA) of highly pure constituents of Bi and Te powders, and then was consolidated...
538
Authors: Ana Coh O. Hirschmann, Maria do Carmo de Andrade Nono, Cosme Roberto Moreira Silva
Abstract:Porous ceramics are of great interest due to their numerous potential applications. The objective of the present investigation was to produce...
161
Authors: Xiao Lei Li, Li Ying Wang, Er An Zai, Hong An Ma, Xiao Peng Jia
Abstract:Heat treatment is an effective means of structural adjustment and performance improvement of AlN ceramics. AlN ceramics prepared at high...
68
Authors: Monica Sindhu, N. Ahlawat, Sujata Sanghi, Ashish Agarwal, A. Ashima, Rekha Kumari, Navneet N. Ahlawat
Chapter 4: Electronic Materials
Abstract:Potassium Sodium Niobate, Na0.5K0.5NbO3 is a promising base material for lead free piezoceramics. The polycrystalline sample Na0.5K0.5NbO3...
210