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Synthesis and properties of nanocrystalline ceria powders

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Abstract

Nanocrystalline CeO2 powder was synthesized by a citrate-nitrate autoignition process and characterized by thermal analysis, x-ray diffraction, and impedance spectroscopy measurements. Nanocrystalline (20–40 nm) ceria powder with fluorite structure had formed in situ during the citrate-nitrate autoignition process. The powder prepared could be sintered to density more than 98% of theoretical density at 1450 °C. The nanocrystalline CeO2 exhibited an increase in conductivity in Ar and H2 than air above 600 °C, suggesting a possible electronic contribution to the conductivity at low oxygen partial pressures. Impedance measurements on the sintered samples unequivocally established the potential of this process in developing phase pure ceria compositions.

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Authors and Affiliations

  1. Electroceramics Division, Central Glass and Ceramic Research Institute, Kolkata, 700 032, India

    S. Basu, P. Sujatha Devi & H. S. Maiti

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  1. S. Basu
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  2. P. Sujatha Devi
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  3. H. S. Maiti
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Correspondence to P. Sujatha Devi.

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Basu, S., Devi, P.S. & Maiti, H.S. Synthesis and properties of nanocrystalline ceria powders. Journal of Materials Research 19, 3162–3171 (2004). https://doi.org/10.1557/JMR.2004.0442

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