Structural phase transition in the perovskite-type tantalum oxynitrides, Ca[1-x]Eu[x]Ta(O,N)[3]

Motohashi, Teruki; Hamade, Yohei; Masubuchi, Yuji; Takeda, Takashi; Murai, Kei-ichiro; Yoshiasa, Akira; Kikkawa, Shinich

Structural phase transition in the perovskite-type tantalum oxynitrides, Ca[1-x]Eu[x]Ta(O,N)[3]

Motohashi, Teruki; Hamade, Yohei; Masubuchi, Yuji et al.

Materials Research Bulletin, 2009, 44(9), 1899-1905

Permalink : https://hdl.handle.net/2115/39289

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アクセス権	open access
URI	https://hdl.handle.net/2115/39289
タイトル	Structural phase transition in the perovskite-type tantalum oxynitrides, Ca[1-x]Eu[x]Ta(O,N)[3]
著者	Motohashi, Teruki ; Hamade, Yohei ; Masubuchi, Yuji ; Takeda, Takashi ; Murai, Kei-ichiro ; Yoshiasa, Akira ; Kikkawa, Shinich
e-Rad_Researcher 00323840 著者名 Motohashi, Teruki
著者名 Hamade, Yohei
e-Rad_Researcher 80466440 著者名 Masubuchi, Yuji
著者名 Takeda, Takashi
著者名 Murai, Kei-ichiro
著者名 Yoshiasa, Akira
著者名 Kikkawa, Shinich
言語	英語
キーワード	Ceramics
	Chemical synthesis
	Electron diffraction
	X-ray diffraction
	Crystal structure
発行日	2009-09
出版者	Elsevier Ltd.
収録物名	Materials Research Bulletin
巻(号)	44(9)
ページ	1899-1905
抄録	Pure Ca[1-x]Eu[x]Ta(O,N)[3] were successfully synthesized in the whole range of Ca/Eu compositions by means of ammonia nitridation via a citrate precursor route. As-nitrided products with x < 0.4 were apparently orthorhombic, while those with x ≥ 0.4 crystallized in a cubic structure. The anionic composition was found to be essentially O2N and independent of Eu content(x). The as-nitrided EuTaO2N possessed a cubic perovskite-type structure, while high-temperature post-annealing led to a tetragonal EuTaO2N phase with better crystallinity. The re-nitridation transformed the post-annealed product into the original cubic lattice, which might be an average of the tetragonal micro-domains.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0025-5408
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.materresbull.2009.05.011