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Preparation and thermal stability of oxynitride perovskite solid solution Sr1-xLaxTa1-xTixO2N

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Title: Preparation and thermal stability of oxynitride perovskite solid solution Sr1-xLaxTa1-xTixO2N
Authors: Masubuchi, Yuji Browse this author →KAKEN DB
Ohtaki, Sota Browse this author
Fujii, Kotaro Browse this author
Yashima, Masatomo Browse this author
Higuchi, Mikio Browse this author →KAKEN DB
Kikkawa, Shinichi Browse this author
Keywords: Oxynitride perovskite
Ammonia nitridation
Thermal stability
Neutron diffraction
Issue Date: Dec-2020
Publisher: Elsevier
Journal Title: Journal of the European ceramic society
Volume: 40
Issue: 16
Start Page: 6288
End Page: 6292
Publisher DOI: 10.1016/j.jeurceramsoc.2019.10.004
Abstract: The thermal stability of oxynitride perovskites is very important for the fabrication of their dense ceramics. In this study, a solid solution of the oxynitride perovskite Sr1-xLaxTa1-xTixO2N was prepared via the ammonia nitridation of oxide precursors. The oxynitrides products obtained at x <= 0.2 and x >= 0.7 had tetragonal and triclinic perovskite-type structures, respectively. A neutron diffraction study on the oxynitride product obtained at x = 0.2 indicated that this tetragonal perovskite had a cis-type anion distribution similarly to SrTaO2N. The tetragonal perovskite released a part of nitrogen at approximately 1000 degrees C in a nitrogen atmosphere while maintaining the perovskite structure at least to 1450 degrees C. The oxynitride perovskites at x >= 0.5 gradually decomposed to a mixture of LaTiO2N, LaTiO3, La(OH)(3), La2O3, TiN and TaO above 1100 degrees C.
Rights: ©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鱒渕 友治

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