Skip to main content Accessibility help
×
Home

Low-temperature preparation of dense 10 mol%-Y2O3-doped CeO2 ceramics using powders synthesized via carbonate coprecipitation

  • Yarong Wang (a1), Toshiyuki Mori (a1), Ji-Guang Li (a2), Takayasu Ikegami (a2) and Yoshiyuki Yajima (a2)...

Abstract

A carbonate coprecipitation method was used for the facile synthesis of highly reactive 10 mol%-Y2O3-doped CeO2 (20YDC) nanopowders, employing nitrates as the starting salts and ammonium hydrogen carbonate (AHC) as the precipitant. The AHC/RE3+ (RE = Ce + Y) molar ratio (R) and the reaction temperature (T) significantly affect the final yield and precursor properties, including chemical composition and particle morphology. Suitable processing conditions are T = 60 °C and R = 2.5 to 10, under which precipitation is complete, and the resultant precursors show ultrafine particle size, spherical particle shape, and good dispersion. The thus-processed precursors are basic carbonates with an approximate formula of Ce0.8Y0.2(OH)CO3 · 2H2O, which directly yield oxide solid solutions upon thermal decomposition at a very low temperature of approximately 400 °C. The 20YDC solid-solution powders calcined at 700 °C show excellent reactivity and were densified to >99% of theoretical via pressureless sintering at a very low temperature of 950 °C for 6 h.

Copyright

Corresponding author

a)Address all correspondence to this author. e-mail: WANG.Yarong@nims.go.jp

References

Hide All
1.Balducci, G., Kaspar, J., Fornasiero, P., Graziani, M., Islam, M.S., and Gale, J.D., J. Phys. Chem. B 101, 1750 (1997).
2.Yao, H.C. and Yao, Y.F., J. Catal. 86, 254 (1984).
3.Palmqvist, A.E.C., Zwinkels, M.F.M., Zhang, Y., Jaras, S.G., and Muhammed, M., Nanostruct. Mater. 8, 801 (1997).
4.Minh, N.Q., J. Am. Ceram. Soc. 76, 563 (1993).
5.Etsell, T.H. and Flengas, S.N., Chem. Rev. 70, 339 (1970).
6.Steele, B.C.H., Middleton, P.H., and Rudkin, R.A., Solid State Ionics 40–41, 388 (1990).
7.Chen, P-L. and Chen, I-W., J. Am. Ceram. Soc. 76, 1577 (1993).
8.Chen, P-L. and Chen, I-W., J. Am. Ceram. Soc. 79, 3129 (1996).
9.Li, J-G., Ikegami, T., Lee, J-H., and Mori, T., Acta Mater. 49, 419 (2001).
10.Yahiro, H., Eguchi, K., and Arai, H., Solid State Ionics 36, 71 (1989).
11.Kudo, T. and Obayashi, H., J. Electrochem. Soc. 122, 142 (1975).
12.Hertle, J.V., Horita, T., Kawada, T., Sakai, N., Yokokawa, H., and Dokiya, M., Ceram. Int. 24, 229 (1998).
13.Higashi, K., Sonoda, K., Ono, H., Sameshita, S., and Hirata, Y., J. Mater. Res. 14, 957 (1999).
14.Dragoo, A.L. and Dominggues, L.P., J. Am. Ceram. Soc. 65, 253 (1982).
15.Aiken, B., Hsu, W.P., and Matijevic, E., J. Am. Ceram. Soc. 71, 845 (1988).
16.Yamashita, K., Ramanujachary, K.V., and Greenblatt, M., Solid State Ionics 81, 53 (1995).
17.Huang, W., Shuk, P., and Greenblatt, M., Chem. Mater. 9, 2240 1997.
18.Markmann, J., Tschope, A., and Birringer, R., Acta Mater. 50, 1433 (2002).
19.Wang, Y., Mori, T., Li, J-G., Ikegami, T., J. Am. Ceram. Soc. 85, 3105 (2002).
20.Li, J-G., Ikegami, T., Mori, T., and Wada, T., Chem. Mater. 13, 2913 (2001).
21.Li, J-G., Ikegami, T., Mori, T., and Wada, T., Chem. Mater. 13, 2921 (2001).
22.Williams, D.E., Ames Lab. Rep. IS-1052 (U.S.D.O.E., Iowa State University, Ames, IA, 1964).
23.Ryabchikov, D.I. and Terentyeva, E.A., in Progress in the Science and Technology of the Rare Earth, edited by Eyring, L. (Pergamon Press, New York, 1964), p. 139.
24.Head, E.L. and Holly, C.E., Jr., in Rare Erath Research II, edited by Vorres, K.S. (Gordon and Breach, London, U.K., 1964), p. 51.
25.Akinc, M. and Sordelet, D., Adv. Ceram. Mater. 2, 232 (1987).
26.Wang, H-C. and Lu, C-H., Mater. Res. Bull. 37, 783 (2002).
27.Powder Diffraction File No. 34–0394 (International Centre for Diffraction Data, Newton Square, PA, 1992).
28.Wada, H. and Kinoshita, S., Bull. Chem. Soc. Jpn. 52, 428 (1979).
29.Herring, C., J. Appl. Phys. 21, 301 (1950).
30.Brook, R.J., J. Am. Ceram. Soc. 52, 56 (1969).
31.Lange, F.F., J. Am. Ceram. Soc. 72, 3 (1989).
32.Zhou, Y-C. and Rahaman, M.N., Acta Mater. 45, 3635 (1997).

Low-temperature preparation of dense 10 mol%-Y2O3-doped CeO2 ceramics using powders synthesized via carbonate coprecipitation

  • Yarong Wang (a1), Toshiyuki Mori (a1), Ji-Guang Li (a2), Takayasu Ikegami (a2) and Yoshiyuki Yajima (a2)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed