DC Bias Field Dependence on High-Power Characteristics of PbTiO3–Pb(Mg1/3Nb2/3)O3 Electrostrictive Ceramics

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概要

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• The mechanical quality factor $Q_{\text{m}}$ of a normal ferroelectric ceramic vibrator decreases and heat is given off when the vibrator is continuously driven at a high level of vibration stress under a resonant mode. The irreversible motions of ferroelectric non-180° domain walls in the ferroelectric ceramic vibrator cause this unfavorable behavior. The effect of ferroelectric domain structure under the vibration stress on electromechanical characteristics was studied using relaxor ferroelectric electrostrictive ($1-x$)PbTiO3–$x$Pb(Mg1/3Nb2/3)O3 ($x=1.00$, 0.95, 0.90) ceramics. The $Q_{\text{m}}$ of the paraelectric Pb(Mg1/3Nb2/3)O3 ceramics was consistently higher than 5000 at a high stress level under a dc bias field. This $Q_{\text{m}}$ is much larger than that of typical hard lead zirconate titanate (PZT) ceramics. The Pb(Mg1/3Nb2/3)O3 ceramics show a considerably large piezoelectric $d_{31}$ constant which is comparable to that of hard PZT ceramics. The electrostrictive ceramics are therefore superior electromechanical vibrator materials for high-power devices.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2007-07-30

著者

• UMEDA Mikio

  Department of Electronic Control Engineering, Nagaoka National College of Technology

• Wada Takahiro

  Department Of Intelligent Mechanical Systems Faculty Of Engineering Kagawa University

• Hayano Shuji

  Lead Techno Co., Ltd. (c/o Ryukoku University, REC), 1-5 Yokotani, Seta Oe, Otsu 520-2194, Japan

• Umeda Mikio

  Department of Electronic Control Engineering, Nagaoka National College of Technology, Nagaoka, Niigata 940-8532, Japan

• Takahashi Sadayuki

  Lead Techno Corporation, Ikoma, Nara 630-0201, Japan

• Wada Takahiro

  Department of Chemistry, Tokyo Metropolitan University

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