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Thermal evolution of the microstructure of nanosized LaFeO3 powders from the thermal decomposition of a heteronuclear complex, La[Fe(CN)6] · 5H2O

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Abstract

The thermal decomposition of a heteronuclear complex, La[Fe(CN)6] · 5H2O, leads to the preparation of nanosized single-phase perovskite-type LaFeO3 powders. The microstructural evolution of LaFeO3 with the temperature has been studied by x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The product of the decomposition at 500 °C consists of nanoporous grains which have the morphology of the complex, but diffracting as a monocrystal of LaFeO3. At the higher temperatures, the nanosized particles start to separate from each other, still keeping the shape of the complex grains and forming soft agglomerates. The formation of LaFeO3 from the complex at low temperatures is facilitated by the formation of an orthorhombic transition phase.

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Authors and Affiliations

  1. Dipartimento di Scienze e Tecnologie Chimiche, Universita’ di Roma “Tor Vergata”, Via della Ricerca Scientifica, Roma, 00133, Italy

    Enrico Traversa & Patrizia Nunziante

  2. Department of Materials and Biological Chemistry, Faculty of Science, Yamagata University, Yamagata, 990, Japan

    Masatomi Sakamoto

  3. Department of Materials Science and Engineering, Faculty of Engineering, Ehime University, Matsuyama, 790-77, Japan

    Yoshihiko Sadaoka

  4. INFM, Dipartimento di Fisica, Universita’ di Ferrara, Via Paradiso 12, Ferrara, 44100, Italy

    Maria Cristina Carotta & Giuliano Martinelli

Authors
  1. Enrico Traversa
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  2. Patrizia Nunziante
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  3. Masatomi Sakamoto
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  4. Yoshihiko Sadaoka
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  5. Maria Cristina Carotta
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  6. Giuliano Martinelli
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Traversa, E., Nunziante, P., Sakamoto, M. et al. Thermal evolution of the microstructure of nanosized LaFeO3 powders from the thermal decomposition of a heteronuclear complex, La[Fe(CN)6] · 5H2O. Journal of Materials Research 13, 1335–1344 (1998). https://doi.org/10.1557/JMR.1998.0189

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  • DOI: https://doi.org/10.1557/JMR.1998.0189

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