KNbO3系非鉛強誘電体セラミックスの大振幅圧電特性

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/