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Lanthanum zirconate nanoparticles and ceramics produced using a nitrate-modified alkoxide synthesis route

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Abstract

Fine lanthanum zirconate powder was prepared by thermally decomposing a nitrate-alkoxide-based precursor derived from dehydrated lanthanum nitrate, zirconium n-butoxide and 2-methoxyethanol. Upon heating, the decomposition of the organic groups was promoted by the nitrate groups, yielding a porous powder that crystallized into a pyrochlore phase at 800 °C. The powder that was heat treated at 900 °C for 1 h was composed of friable agglomerates of approximately 60-nm-sized nanoparticles. The ceramics obtained from the powder heat treated at 900 °C and milled for 30 min reached a relative density of 97.9 % after sintering at 1,400 °C for 10 h, which is at least 100 °C lower than the typically reported temperatures for this material.

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Acknowledgement

EU Centre of Excellence SICER (G1MA-CT-2002-04029) and the Slovenian Research Agency under program “Electronic ceramics, nano, 2D and 3D structures” P2-105, ARRS are acknowledged for their financial support. The authors wish to thank Mrs. Jana Cilensek and Mr. Silvo Drnovsek for help in the experimental work and Mr. Tadej Rojac for the crystallite-size calculation.

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Authors and Affiliations

  1. Department of Electronic Ceramics, Jožef Stefan Institute, Ljubljana, 1000, Slovenia

    Elena-Daniela Ion, Barbara Malic & Marija Kosec

  2. National Institute of Materials Physics, Bucharest-Magurele, MG-7, 077125, Romania

    Elena-Daniela Ion

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  1. Elena-Daniela Ion
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  2. Barbara Malic
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  3. Marija Kosec
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Correspondence to Elena-Daniela Ion.

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Ion, ED., Malic, B. & Kosec, M. Lanthanum zirconate nanoparticles and ceramics produced using a nitrate-modified alkoxide synthesis route. J Sol-Gel Sci Technol 44, 203–209 (2007). https://doi.org/10.1007/s10971-007-1625-8

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  • DOI: https://doi.org/10.1007/s10971-007-1625-8

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