Oxygen nonstoichiometry, crystal structure and mechanical properties of La2NiO4+δ

T. Nakamura; Y. Takeyama; S. Watanabe; K. Yashiro; K. Sato; T. Hashida; J. Mizusaki

doi:10.1149/1.3205814

Oxygen nonstoichiometry, crystal structure and mechanical properties of La₂NiO_4+δ

T. Nakamura, Y. Takeyama, S. Watanabe, K. Yashiro, K. Sato, T. Hashida, J. Mizusaki

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

9 Citations (Scopus)

Abstract

Crystal structure and mechanical properties of La₂NiO _4+δ were measured by high temperature X-ray diffractometry and in-situ small punch test as a function of temperature and oxygen partial pressure. As P(O₂) increases, the lattice parameter perpendicular to the perovskite layer increases and that parallel to the layer slightly decreases, and the lattice volume slightly increases. Apparent and true thermal expansion coefficients were calculated from the variation of the lattice constants. The elastic modulus and the fracture strength become larger at higher P(O₂) condition. This may be caused by the structural change due to excess oxygen.

Original language	English
Title of host publication	ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI)
Pages	2573-2580
Number of pages	8
Edition	2 PART 3
DOIs	https://doi.org/10.1149/1.3205814
Publication status	Published - 2009
Event	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting - Vienna, Austria Duration: 2009 Oct 4 → 2009 Oct 9

Publication series

Name	ECS Transactions
Number	2 PART 3
Volume	25
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting
Country/Territory	Austria
City	Vienna
Period	09/10/4 → 09/10/9

ASJC Scopus subject areas

Engineering(all)

Access to Document

10.1149/1.3205814

Cite this

Nakamura, T, Takeyama, Y, Watanabe, S, Yashiro, K , Sato, K , Hashida, T & Mizusaki, J 2009, Oxygen nonstoichiometry, crystal structure and mechanical properties of La₂NiO_4+δ. in ECS Transactions - Solid Oxide Fuel Cells 11 (SOFC-XI). 2 PART 3 edn, ECS Transactions, no. 2 PART 3, vol. 25, pp. 2573-2580, 11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI)- 216th ECS Meeting, Vienna, Austria, 09/10/4. https://doi.org/10.1149/1.3205814

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AB - Crystal structure and mechanical properties of La2NiO 4+δ were measured by high temperature X-ray diffractometry and in-situ small punch test as a function of temperature and oxygen partial pressure. As P(O2) increases, the lattice parameter perpendicular to the perovskite layer increases and that parallel to the layer slightly decreases, and the lattice volume slightly increases. Apparent and true thermal expansion coefficients were calculated from the variation of the lattice constants. The elastic modulus and the fracture strength become larger at higher P(O2) condition. This may be caused by the structural change due to excess oxygen.

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