Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-23T16:47:09.722Z Has data issue: false hasContentIssue false

Combustion synthesis of nanocrystalline yttria-doped ceria

Published online by Cambridge University Press:  03 March 2011

S.V. Chavan
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
A.K. Tyagi*
Affiliation:
Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
*
a)Address all correspondence to this author. e-mail: aktyagi@magnum.barc.ernet.in
Get access

Abstract

Nanocrystalline yttria-doped ceria powder, with the composition Ce0.55Y0.45O1.775, was synthesized by a combustion technique using citric acid as the fuel and the corresponding metal nitrates as oxidants. This process involves mild conditions as the external temperature required to initiate the combustion is only approximately 250 °C. The product was characterized by x-ray diffraction (XRD) to ascertain the phase purity. The crystallite size of these calcined samples, as seen by transmission electron microscopy, was found to be in the range 6 nm to 50 nm. The surface area of the fine powder, as obtained from the Brunauer–Emmett–Teller technique, was about 140 m2/g. The agglomeration behavior as a function of temperature and the lattice thermal expansion studies were carried out using high-temperature XRD. This nanocrystalline powder resulted in nearly theoretical bulk density at a relatively lower temperature, which is attributed to the superior powder properties. The sintered microstructure, as studied by scanning electron microscopy, revealed the presence of fine grains.

Type
Articles
Copyright
Copyright © Materials Research Society 2004

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

1Maki, Y., Matsuda, M. and Kudo, T.U.S. Patent No. 3 607 424 (Sept. 21, 1971).Google Scholar
2Logothetis, E.M.National Symposium on Ceramics on the Service of Men, Washington DC (1976, June 7).Google Scholar
3Vanherle, J., Horita, T., Kawada, T., Sakai, N., Yokokawa, H. and Dokiya, M.: Solid State Ionics 1255 86 (1996).Google Scholar
4Chavan, S.V. and Tyagi, A.K.J. Am. Ceram. Soc. (2003, in press).Google Scholar
5Gabbitas, N., Thompson, J.G., Withers, R.L. and Rae, A.D.: J. Solid State Chem. 115 23 (1995).Google Scholar
6Longo, V. and Podda, L: J. Mater. Sci. 16 839 (1981).Google Scholar
7Weller, H.: Angew. Chem. Int. Ed. Eng. 32 41 (1993).Google Scholar
8Gleiter, H.: J. Appl. Cryst. 24 79 (1991).Google Scholar
9Zhou, Y. and Rahaman, M.N.: Acta Mater. 45 3635 (1997).Google Scholar
10Huang, K., Feng, M. and Goodenough, J.B.: J. Am. Ceram. Soc. 81 357 (1998).Google Scholar
11Sammes, N.M. and Cai, Z.: Solid State Ionics 100 39 (1997).CrossRefGoogle Scholar
12Huang, W., Shuk, P. and Greenblattt, M.: Solid State Ionics 100 23 (1997).Google Scholar
13Yoshimura, M. and Suchanek, W.: Solid State Ionics 98 197 (1997).Google Scholar
14Kingsley, J.J., Suresh, K. and Patil, K.C.: J. Mater. Sci. 25 1305 (1990).CrossRefGoogle Scholar
15Ferreira, V.M., Azough, F., Baptista, J.L. and Feer, R.: Ferroelectrics 133 127 (1992).Google Scholar
16Kingsley, J.J. and Patil, K.C.: Mater. Lett. 6 427 (1988).Google Scholar
17Bhaduri, S., Bhaduri, S.B. and Zhou, E.: J. Mater. Res. 13 156 (1998).CrossRefGoogle Scholar
18Pederson, R.L., Chick, L.A. and Exarhos, G.J.U.S. Patent No. 5 114 702 (May 19, 1992).Google Scholar
19Bianchetti, M.F., Juarez, R.E., Lamas, D.G., de Reca, N.E. Walsoe, Perez, L. and Cabanillas, E.J. Mater. Res. 17 2185 (2002).Google Scholar
20Manoharan, S.S. and Patil, K.C.: J. Am. Ceram. Soc. 75 1012 (1992).Google Scholar
21Jain, S.R., Adiga, K.C. and Verneker, V.R. PaiCombustion Flame 40 71 (1981).Google Scholar
22Purohit, R.D. and Tyagi, A.K.: J. Mater. Chem. 12 312 (2002).Google Scholar
23Purohit, R.D., Sharma, B.P., Pillai, K.T. and Tyagi, A.K.: Mater. Res. Bull. 36 2711 (2001).CrossRefGoogle Scholar
24Chavan, S.V., Mathews, M.D. and Tyagi, A.K.: J. Alloy. Compd. 360 189 (2003).Google Scholar