Spark plasma sintering of dielectric BaTaO2N close to the melting point of the BaCN2 additive

Hosono, Akira; Inoguchi, Masashi; Masubuchi, Yuji; Murayama, Koji; Iha, Michiaki; Higuchi, Mikio; Kikkawa, Shinichi

Spark plasma sintering of dielectric BaTaO2N close to the melting point of the BaCN2 additive

Hosono, Akira; Inoguchi, Masashi; Masubuchi, Yuji et al.

Journal of the European ceramic society, 2020, 40(6), 2317-2322

Permalink : https://hdl.handle.net/2115/84431

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アクセス権	open access
URI	https://hdl.handle.net/2115/84431
タイトル	Spark plasma sintering of dielectric BaTaO2N close to the melting point of the BaCN2 additive
著者	Hosono, Akira ; Inoguchi, Masashi ; Masubuchi, Yuji ; Murayama, Koji ; Iha, Michiaki ; Higuchi, Mikio ; Kikkawa, Shinichi
著者名 Hosono, Akira
著者名 Inoguchi, Masashi
e-Rad_Researcher 80466440 著者名 Masubuchi, Yuji
著者名 Murayama, Koji
著者名 Iha, Michiaki
e-Rad_Researcher 40198990 著者名 Higuchi, Mikio
著者名 Kikkawa, Shinichi
言語	英語
キーワード	Oxynitride
	Perovskite
	Metal carbodiimide
	Spark plasma sintering
発行日	2020-06
出版者	Elsevier
収録物名	Journal of the European ceramic society
巻(号)	40(6)
ページ	2317-2322
抄録	The perovskite-type oxynitride BaTaO2N is a promising lead-free relaxor ferroelectric material. However, this material releases a part of its nitrogen during its sintering above 1350 degrees C. Subsequent annealing of the resulting sintered BaTaO2N0.85 ceramics under an ammonia flow is necessary to recover an insulating, stoichiometric BaTaO2N ceramics. Very recently, molten BaCN2 was reported to be a useful flux for the preparation of BaTaO2N microcrystals without the loss of nitrogen. In the present work, BaTaO2N powder was sintered with a BaCN2 additive under mechanical pressure, using a spark plasma sintering system. Nitrogen loss from the BaTaO2N ceramic was avoided during liquid phase sintering at approximately 900 degrees C. The stoichiometric BaTaO2N ceramic product with a relative density of 79.8 % was an electrically insulator and it showed its relative dielectric constants, epsilon(r) in the range from 320 to 650 and a loss tans values from 0.04 to 0.19 at room temperature.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	0955-2219
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.jeurceramsoc.2020.02.008