Temperature dependence of unipolar fatigue behavior of lead-free alkali niobate ceramics

• MARTIN Alexander

  Frontier Research Institute for Materials Science, Nagoya Institute of Technology

• KAKIMOTO Ken-ichi

  Frontier Research Institute for Materials Science, Nagoya Institute of Technology

• HATANO Keiichi

  Materials R&D Department, R&D Laboratory, TAIYO YUDEN CO., LTD.

• DOSHIDA Yutaka

  Materials R&D Department, R&D Laboratory, TAIYO YUDEN CO., LTD.

抄録

The unipolar fatigue behavior of undoped Li_0.06Na_0.52K_0.42NbO₃ (LNKN6-a) and the same compound with additives (LNKN6-b) were observed. Unipolar cycling was performed between room temperature and 150°C under a high unipolar electric field of 4 kV/mm. LNKN6-a fatigued under crack formation throughout the examined temperature range. The switchable polarization 2P_r of LNKN6-a decreased for 20% (=2 µC/cm²) at 150°C. In contrast, mechanical degradation was not observed in LNKN6-b. The switchable polarization 2P_r of LNKN6-b decreased for 15% (=3.2 µC/cm²) at 150°C. It should be noted that at 50°C, fatigue-free behavior was observed for LNKN6-b over at least 10⁶ cycles. The influence of phase transition on this fatigue-free behavior was discussed.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 124 (6), 730-736, 2016

  公益社団法人 日本セラミックス協会

キーワード

• Actuators
• Fatigue
• Piezoelectric properties
• Lead-free
• Phase transformation

詳細情報

• CRID: 1390282680262089344
• NII論文ID: 130005155652
• DOI: 10.2109/jcersj2.15279
• ISSN: 13486535
• ISSN: 18820743
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/124/6/124_15279/_pdf
• 本文言語コード: ja
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