Sintering and dielectric properties of perovskite SrTaO2N ceramics

Zhang, Ya-Ru; Motohashi, Teruki; Masubuchi, Yuji et al.

Journal of the European Ceramic Society, 2012, 32(6), 1269-1274

Permalink : https://hdl.handle.net/2115/49348

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アクセス権
open access
URI
https://hdl.handle.net/2115/49348
タイトル
Sintering and dielectric properties of perovskite SrTaO2N ceramics
著者
Zhang, Ya-Ru ; Motohashi, Teruki ; Masubuchi, Yuji ; Kikkawa, Shinichi
著者名
Zhang, Ya-Ru
e-Rad_Researcher
00323840
著者名
Motohashi, Teruki
e-Rad_Researcher
80466440
著者名
Masubuchi, Yuji
e-Rad_Researcher
10127219
著者名
Kikkawa, Shinichi
言語
英語
キーワード
Perovskite oxynitrides
Sintering
Dielectric properties
Hot pressing
Sintering additives
発行日
2012-06
出版者
Elsevier
収録物名
Journal of the European Ceramic Society
巻(号)
32(6)
ページ
1269-1274
抄録
Single-phase perovskite oxynitride SrTaO2N ceramics were prepared by pressureless sintering at 1400℃ under a nitrogen atmosphere, using 5 wt% of SrCO3 or La2O3 as a sintering additive. In contrast, SrTaO2N bulks without additives contained TaC and Ta3N5 impurities. Sintering in nitrogen led to oxygen/nitrogen deficiencies in the oxynitride, while post annealing in flowing ammonia was effective to eliminate the anion vacancies. The introduction of additives significantly improved the sinterability of SrTaO2N ceramics. A relative density of >90% in the bulk was achieved with a highly dense microstructure with smaller grain sizes. The SrTaO2N bulk with SrCO3 additive exhibited superior dielectric performance with a high relative permittivity (εr =1.0 x 10^[4]) and dissipation factor (tan δ = 0.039) at a frequency of 1 MHz.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
PISSN
0955-2219
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1016/j.jeurceramsoc.2011.12.001