Paper Titles
Effect of Quartz of Fine Particle Size on Porcelain Properties
p.493
Structural Characteristics of the Modern Sintered Tool Materials
p.499
Synthesis and Determination of the Kinetic Parameters for Non-Isothermal Decomposition of Complexes Ln(thd)3phen
p.506
Synthesis and Kinetic Study by Ozawa Method of the Thermal Decomposition of Complexes Ln(thd)3phen
p.513
Influence of Sintering on Electrical Properties and Phase Transition of La2Mo2O9
p.520
Effect of Isothermal Sintering Time on the Properties of the Ceramic Composite ZrO2-Al2O3
p.526
Microstructural Variations in SiC Ceramics Sintered with AlN-Y2O3
p.532
Effect of the Particle Size of an Ash from Sugarcane Bagasse in the Properties of Red Ceramics
p.538
Recycling of Steel Sludge into Red Ceramic
p.544

Influence of Sintering on Electrical Properties and Phase Transition of La2Mo2O9

Article Preview

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.

You might also be interested in these eBooks
Advanced Powder Technology V View Preview

Info:

Periodical:

Materials Science Forum (Volumes 530-531)

Pages:

520-525

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.530-531.520

Citation:

Cite this paper

Online since:

November 2006

Authors:

R.A. Rocha, E.N.S. Muccillo

Keywords:

Differential Thermal Analysis (DTA), Electrical Properties, Phase Transition, Sintering

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] P. Lacorre, F. Goutenoire, O. Bohnke, R. Retoux, Y. Laligant, Nature 404 (2000) p.856.

DOI: 10.1038/35009069

Google Scholar

[2] J. B. Goodenough, Annual Review Materials Research 33 (2003) p.91.

Google Scholar

[3] D. Z. de Florio, F. C. Fonseca, E. N. S. Muccillo, R. Muccillo, Cerâmica 50 (2004) p.275.

DOI: 10.1590/s0366-69132004000400002

Google Scholar

[4] J. P. Fournier, J. Fournier, R. Kohlmuller, Bull. Soc. Chim. Fr. 12 (1970) p.4277.

Google Scholar

[5] F. Goutenoire, O. Isnard, R. Retoux, P. Lacorre, Chem. Mater. 12 (2000) p.2575.

Google Scholar

[6] D. S. Tsai, M. J. Hsieh, J. C. Tseng, H. S. Lee, J. Eur. Ceram. Soc. 25 (2005) p.481.

Google Scholar

[7] S. Georges, F. Goutenoire, F. Altorfer, D. Sheptyakov, F. Fauth, E. Suard, P. Lacorre, Solid State Ionics 161 (2003) p.231.

Google Scholar

[8] S. A. Hayard, S. A. T. Redfern, J. Phys.: Condens. Matter 16 (2004) p.3571.

Google Scholar

[9] X. P. Wang, Q. F. Fang, J. Phys.: Condens. Matter 13 (2001) p.1641.

Google Scholar

[10] W. Kuang, Y. Fan, K. Yao, Y. Chen, J. Solid State Chem. 140 (1998) p.354.

Google Scholar

[11] R. A. Rocha, E. N. S. Muccillo, J. Alloys Comp. 400 [1-2] (2005) p.83.

Google Scholar

[12] J. Yang, Z. Wen, Z. Gu, D. Yan, J. Eur. Ceram. Soc. 25 (2005) p.3315.

Google Scholar

[13] R. Subasri, H. Näfe, F. Aldinger, Mater. Res. Bull. 38 (2003) p. (1965).

Google Scholar

[14] R. A. Rocha, E. N. S. Muccillo, Chem. Mater. 15 (2003) p.4268.

Google Scholar

[15] D. Marrero-López, J. C. Ruiz-Morales, P. Núñez, J. C. C. Abrantes, J. R. Frade, J. Solid State Chem. 177 (2004) p.2377.

Google Scholar

[16] D. Marrero-López, J. Canales-Vázquez, J. C. Ruiz-Morales, A. Rodríguez, J. T. S. Irvine, P. Núñez, Solid State Ionics 176 (2005) p.1807.

Google Scholar

[17] M. P. Pechini, U.S. Patent 3, 330, 697 (1967).

Google Scholar

[18] S. Georges, F. Goutenoire, O. Bohnke, M. C. Steil, S. J. Skinner, H. D. Wiemhöfer, P. Lacorre, J. New Mater. Electrochem. Systems 7 (2004) p.51.

Google Scholar

[19] F. Goutenoire, O. Isnard, E. Suard, O. Bohnke, Y. Laligant, R. Retoux, P. Lacorre, J. Mater. Chem. 11 (2001) p.119.

DOI: 10.1039/b002962i

Google Scholar

[20] C. Tealdi, G. Chiodelli, L. Malavasi, G. Flor, J. Mater. Chem. 14 (2004) p.3553.

Google Scholar