カテゴリ: 論文誌(論文単位)グループ名: 【C】電子・情報・システム部門発行日: 2011/06/01タイトル(英語): Large Amplitude Piezoelectric Properties of KNbO3-based Lead-free Ferroelectric Ceramics著者名: 永田 肇（東京理科大学 理工学部 電気電子情報工学科），竹中 正（東京理科大学 理工学部 電気電子情報工学科）著者名(英語): Hajime Nagata (Tokyo University of Science, Faculty of Science and Technology, Department of Electrical Engineering), Tadashi Takenaka (Tokyo University of Science, Faculty of Science and Technology, Department of Electrical Engineering)キーワード: 非鉛強誘電体セラミックス，KNbO3，機械的品質係数，圧電歪み定数，ハイパワー圧電特性 lead-free ferroelectric ceramics，KNbO3，mechanical quality factor，piezoelectric strain constant，high power piezoelectric properties要約(英語): High power piezoelectric characteristics of Mn doped KNbO3 (KN+MnCO3 x wt% x=0∼0.8 wt%, KN-Mnx) ceramics were firstly reported in this paper. Mechanical quality factor, Qm, of KN-Mn x ceramics at small amplitude vibration increased with increasing Mn content and the Qm of KN-Mn0.8 ceramic reached about 820. The maximum vibration velocity, vo-p, about 2.3 m/s was obtained for KN-Mn0.8 with Qm=820. The Qm at large-amplitude vibration for KN-Mn0.8 and Pb(Zr,Ti)O3 [PZT]-based ceramics [N6] decreased with increasing the vo-p. The Qm of KN-Mn0.8 was smaller than that of N6 at the small-amplitude vibration. However, at the large amplitude vibration, vo-p>0.6 m/s, the Qm value of KN-Mn0.8 was larger than that of N6. Therefore, it was clarified that KN-based lead-free piezoelectric ceramics possess superior mechanical stability at large-amplitude vibration. This is very good sign for high power piezoelectric applications.本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.131 No.6 （2011） 特集：圧電材料・デバイス本誌掲載ページ: 1158-1162 p原稿種別: 論文／日本語電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/131/6/131_6_1158/_article/-char/ja/
