Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-23T05:23:51.408Z Has data issue: false hasContentIssue false
  • English
  • Français

Hydrothermal Synthesis and Properties of Ce1−xMxO2-δ(M = La, Bi, Sm, Pr, Tb) Solid Solutions

Published online by Cambridge University Press:  10 February 2011

M. Greenblatt ,
P. Shuk ,
W. Huang ,
S. Dikmen  and
M. Croft
M. Greenblatt
Affiliation:
Department of Chemistry, Rutgers, the State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854-8087, [email protected]
P. Shuk
Affiliation:
Department of Chemistry, Rutgers, the State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854-8087, [email protected]
W. Huang
Affiliation:
Department of Chemistry, Rutgers, the State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854-8087, [email protected]
S. Dikmen
Affiliation:
Department of Chemistry, Rutgers, the State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854-8087, [email protected]
M. Croft
Affiliation:
Department of Chemistry, Rutgers, the State University of New Jersey, 610 Taylor Rd, Piscataway, NJ 08854-8087, [email protected]
Get access

Abstract

A systematic study of hydrothermally prepared Ce1−x,MxO2−δ, (M= Sm, Bi, Pr, Tb; x= 0-0.30) solid solutions, promising materials for application in solid oxide fuel cells and oxygen membranes is presented. Ultrafine particles of uniform crystallite dimension, ∼ 20 nm can be formed in 30 min. under hydrothermal conditions (260°C, 10 MPa). The small particle size (20-50 nm) of the hydrothermally prepared materials allows sintering of the samples into highly dense ceramics at 900-1350°C, significantly lower temperatures than 1600-1650°C required for samples prepared by solid state techniques. The solubility limit of Bi2O3, in CeO2, was determined to be around 20 mol. %. The maximum conductivity, σ600°C ∼ 4.4 × 10−3 S/cm with Ea = 1.01 eV, and σ600°C = 5.7 × 10−3 S/cm with Ea ≈ 0.9 eV was found at x= 0.20 and x= 0.17 for Bi and Sm, respectively. In the Ce-Pr/Tb oxide systems, in addition to the high oxide ion conductivity, electronic conductivity occurs through the hopping of small polarons by a thermally activated mechanism (electron hopping from the Pr3+/Tb3+ to a neighboring Pr4+/Tb4+ ion).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 511
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Takahashi, T. and Kozawa, A., Application of Solid Electrolytes (JEC Press, Ohio, 1980).Google Scholar
2. Takahashi, T., High Conductivity Solid Ionic Conductors (World Scientific, Singapore, 1989).Google Scholar
3. Göpel, W., Jones, T.A., Kleitz, M., Lundström, I. and Seiyama, T., Chemical and Biochemical Sensors (VCH, Weinheim, Germany, 1991/1992; Vol. 2, 3).Google Scholar
4. Etsell, T.H. and Flengas, S.N., Chem. Rev. 70, 339 (1970).Google Scholar
5. Steele, B.C.H, Sci. Ceram. 10, 1 (1980).Google Scholar
6. Subbarao, E. and Maiti, H.S., Solid State Ionics 11, p. 317 (1984).Google Scholar
7. Steele, B.C.H., J. Power Sources 49, 1(1994).Google Scholar
8. Badwal, S.P.S., Science and Technology of Zirconia (Technomic, Lancaster, U.K., 1993).Google Scholar
9. Shuk, P., Wiemhöfer, H.-D., Guth, U., Göpel, W. and Greenblatt, M., Solid State Ionics 89, 179 (1996).Google Scholar
10. Inaba, H. and Tagawa, H., Solid State Ionics 83, 1 (1996).Google Scholar
11. Zhou, Y.C. and Rahaman, M.N., J. Mater. Res. 8, 1680 (1993)Google Scholar
12. Yamashita, K., Ramanujachary, K.V. and Greenblatt, M., Solid State Ionics 81, 53 (1995).Google Scholar
13. Huang, W., Shuk, P. and Greenblatt, M., Chem. Mater. 9, 2240 (1997).Google Scholar
14. Maricle, D. L., Swarr, T. E. and Karavolis, S., Solid State lonics 52, 173 (1192).Google Scholar
15. Takasu, Y.,.Sugino, T., Matsuda, Y., J. Appl. Electrochem. 14, 79 (1984).Google Scholar
16. Kilner, J.A. and Steele, B.C.H., in Nonstoichiometric oxides, edited by Sorensen, O.T. (Academic Press, New York, 1981), p.233.Google Scholar
17. Butler, V., Catlow, C.R.A., Fender, B.E.F. and Harding, J.H., Solid State Ionics 8, 109 (1983).Google Scholar
18. Shannon, R.D., Prewitt, C.T., Acta Crystallogr. 32A, 751 (1976).Google Scholar
19. Bouwmeester, H.J.-M. and Burggraaf, A.J., in Solid State Electrochemistry, edited by Gellings, P.J. and Bouwmeester, H.J.-M. (CRC Press, New York, 1997) p. 481.Google Scholar
20. Teraoka, Y., Zhang, H.M., Furukawa, S., Yamazoe, N. Chem. Lett. 1985, 1743.Google Scholar