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Synthesis and characterization of barium bis(citrato) oxozirconate(IV) tetrahydrate: A new molecular precursor for fine particle BaZrO3

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Abstract

Barium metazirconate (BaZrO3) fine powder has been produced by thermally decomposing a molecular precursor, barium bis(citrato)oxozirconate(IV) tetrahydrate at about 700 °C. The precursor, Ba[ZrO(C6H6O7)2] · 4H2O (BZO) has been synthesized and characterized by employing a combination of spectroscopic and thermoanalytical techniques. The precursor undergoes thermal decomposition in three major stages: (i) dehydration to give an anhydrous barium zirconyl citrate, (ii) decomposition of the anhydrous citrate in a multistep process to form an ionic oxycarbonate intermediate, Ba2Zr2O5CO3, and (iii) decomposition of the oxycarbonate to produce BaZrO3 fine powder. The particle size of the resultant BaZrO3 is about 0.2 μm, and the surface area is found to be 4.0 m2 g−1.

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  1. M. Rajendran

    Present address: Materials Science Research Centre, Indian Institute of Technology, Madras, 600 036, India

Authors and Affiliations

  1. Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560 012, India

    M. Rajendran & Subba M. Rao

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  1. M. Rajendran
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  2. Subba M. Rao
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Rajendran, M., Rao, S.M. Synthesis and characterization of barium bis(citrato) oxozirconate(IV) tetrahydrate: A new molecular precursor for fine particle BaZrO3. Journal of Materials Research 9, 2277–2284 (1994). https://doi.org/10.1557/JMR.1994.2277

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  • DOI: https://doi.org/10.1557/JMR.1994.2277

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