Chemically-induced structural deformation of layered perovskite oxides

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    In order to understand the behavior of the crystal lattice deformation induced by the interstitial oxygen formation in La2(Ni0.9M0.1)O4+δ (M = Fe, Co, Cu), thermogravimetry, coulometric titration, and high temperature X-ray diffraction measurements were carried out in the temperature range between 873 to 1173 K and the P(O2) range between 10-24 to 1 bar. Oxygen content variation under wide range of P(O2) could be successfully evaluated by combining thermogravimetry and coulometric titration techniques. Compared with non-doped La2NiO4+δ, La2(Ni0.9Fe0.1)O4+δ and La2(Ni0.9Co0.1)O4+δ have more interstitial oxygen while La2(Ni0.9Cu0.1)O4+δ have less. Crystal structure at high temperatures was analyzed assuming the tetragonal symmetry, I4/mmm, for all compositions. With increasing interstitial oxygen concentration, the lattice parameter perpendicular to the perovskite layer increased and that parallel to the perovskite layer decreased. Consequently, the change of the cell volume by the interstitial oxygen formation was small, meaning macroscopic chemical expansion is small.

    Original languageEnglish
    Title of host publication16th International Conference on Nanotechnology - IEEE NANO 2016
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages429-430
    Number of pages2
    ISBN (Electronic)9781509039142
    DOIs
    Publication statusPublished - 2016 Nov 21
    Event16th IEEE International Conference on Nanotechnology - IEEE NANO 2016 - Sendai, Japan
    Duration: 2016 Aug 222016 Aug 25

    Publication series

    Name16th International Conference on Nanotechnology - IEEE NANO 2016

    Other

    Other16th IEEE International Conference on Nanotechnology - IEEE NANO 2016
    CountryJapan
    CitySendai
    Period16/8/2216/8/25

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics

    Fingerprint Dive into the research topics of 'Chemically-induced structural deformation of layered perovskite oxides'. Together they form a unique fingerprint.

  • Cite this

    Nakamura, T., & Amezawa, K. (2016). Chemically-induced structural deformation of layered perovskite oxides. In 16th International Conference on Nanotechnology - IEEE NANO 2016 (pp. 429-430). [7751481] (16th International Conference on Nanotechnology - IEEE NANO 2016). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NANO.2016.7751481