Chemically-induced structural deformation of layered perovskite oxides

Takashi Nakamura; Koji Amezawa

doi:10.1109/NANO.2016.7751481

Chemically-induced structural deformation of layered perovskite oxides

Takashi Nakamura, Koji Amezawa

IMRAM - Division of Process and System Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

In order to understand the behavior of the crystal lattice deformation induced by the interstitial oxygen formation in La₂(Ni_0.9M_0.1)O_4+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 La₂NiO_4+δ, La₂(Ni_0.9Fe_0.1)O_4+δ and La₂(Ni_0.9Co_0.1)O_4+δ have more interstitial oxygen while La₂(Ni_0.9Cu_0.1)O_4+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 language	English
Title of host publication	16th International Conference on Nanotechnology - IEEE NANO 2016
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	429-430
Number of pages	2
ISBN (Electronic)	9781509039142
DOIs	https://doi.org/10.1109/NANO.2016.7751481
Publication status	Published - 2016 Nov 21
Event	16th IEEE International Conference on Nanotechnology - IEEE NANO 2016 - Sendai, Japan Duration: 2016 Aug 22 → 2016 Aug 25

Publication series

Name	16th International Conference on Nanotechnology - IEEE NANO 2016

Conference

Conference	16th IEEE International Conference on Nanotechnology - IEEE NANO 2016
Country/Territory	Japan
City	Sendai
Period	16/8/22 → 16/8/25

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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). Article 7751481 (16th International Conference on Nanotechnology - IEEE NANO 2016). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NANO.2016.7751481

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title = "Chemically-induced structural deformation of layered perovskite oxides",

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.",

author = "Takashi Nakamura and Koji Amezawa",

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doi = "10.1109/NANO.2016.7751481",

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Nakamura, T & Amezawa, K 2016, Chemically-induced structural deformation of layered perovskite oxides. in 16th International Conference on Nanotechnology - IEEE NANO 2016., 7751481, 16th International Conference on Nanotechnology - IEEE NANO 2016, Institute of Electrical and Electronics Engineers Inc., pp. 429-430, 16th IEEE International Conference on Nanotechnology - IEEE NANO 2016, Sendai, Japan, 16/8/22. https://doi.org/10.1109/NANO.2016.7751481

Chemically-induced structural deformation of layered perovskite oxides. / Nakamura, Takashi ; Amezawa, Koji.
16th International Conference on Nanotechnology - IEEE NANO 2016. Institute of Electrical and Electronics Engineers Inc., 2016. p. 429-430 7751481 (16th International Conference on Nanotechnology - IEEE NANO 2016).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - 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.

AB - 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.

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ER -

Chemically-induced structural deformation of layered perovskite oxides

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