(Bi0.5Na0.5)TiO3 系非鉛圧電セラミックスの大振幅特特性の評価

渡部 朋真; 高井 広大; 晝間 裕二; 永田 肇; 竹中 正

doi:10.14853/pcersj.2009S.0.506.0

Annual Meeting of The Ceramic Society of Japan, 2009

Session ID : 3A09

DOI https://doi.org/10.14853/pcersj.2009S.0.506.0

Conference information

Host: The Ceramic Society of Japan

Large-Amplitude Vibration Characteristics of (Bi_0.5Na_0.5)TiO₃-based Lead-Free Ferroelectric Ceramics.

*TOMOMI WATANABE, KODAI TAKAI, YUJI HIRUMA, HAJIME NAGATA, TADASHI TAKENAKA

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Keywords: lead-free piezoelectric ceramics, (Bi_0.5Na_0.5)TiO₃, high-power characteristics, vibration velocity, mechanical quality factor

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Abstract

Piezoelectric properties under large-amplitude vibration of x(Bi_0.5Na_0.5)TiO₃-y(Bi_0.5Li_0.5)TiO₃-zBaTiO₃+wMnCO₃ wt% [BNLBT100y-100zMnw ; y = 0.04, z =0.02 ~ 0.08, w = 0, 0.4] ceramics were studied. Vibration velocity v_0-p of rhombohedral side, BNLBT4-4Mn0.4 and MPB composition, BNLBT4-6Mn0.4, linearly increased with increasing applied field E_a at v_0-p ≤ 1.5 m/s. Furthermore, BNLBT4-4Mn0.4 had a larger mechanical quality factor Q_m and higher depolarization temperature T_d than BNLBT4-6Mn0.6.Therefore, rhombohedral sides BNT-based ceramics are good candidate materials for high power applications.

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