Electric-field-induced strain of (Li,Na,K)NbO3-based multilayered piezoceramics under electromechanical loading
Electric-field-induced strain of (Li,Na,K)NbO3-based multilayered piezoceramics under electromechanical loading
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DOI：
10.1063/5.0029615
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发表时间：
2020-12
影响因子：
3.2
通讯作者：
H. Nishiyama;Alexander Martin;Keiichi Hatano;Sumiaki Kishimoto;Nobuhiro Sasaki;N. Khansur;K. Webber;K. Kakimoto
中科院分区：
文献类型：
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作者：
H. Nishiyama;Alexander Martin;Keiichi Hatano;Sumiaki Kishimoto;Nobuhiro Sasaki;N. Khansur;K. Webber;K. Kakimoto
制备了无铅（Li，Na，K）NbO 3基多层压电陶瓷材料，并在25 °C ~ 100 °C温度范围内研究了其大信号压电性能。在零应力下，多层膜表现出高的大信号压电常数d 33 <$（= S max / E max）<$350 pm/V，外加单极场为6 kV/mm。应力依赖的d 33 <$，单极场为6 kV/mm，具有明显的电场敏感性，在−80 MPa处出现峰值，这在100 °C下没有观察到。随着温度的升高，逐渐消失的峰表明强烈的影响的结晶相的机电性能的（Li，Na，K）NbO 3为基础的多层膜。对应力-应变环和应力-极化变化的进一步研究表明，低于100 °C的场依赖性峰是由于电场和压应力的组合引起的非180°畴取向。
Lead-free (Li,Na,K)NbO3-based multilayered piezoceramics were prepared, and their large-signal piezoelectric properties, under combined electrical and mechanical loadings, were characterized from 25 °C to 100 °C. Under zero stress, the multilayer exhibited a high large-signal piezoelectric constant d 33 ∗ ( = S max / E max ) ≈ 350 pm/V with an applied unipolar field of 6 kV/mm. The stress-dependent d 33 ∗, with a unipolar field of 6 kV/mm, featured a pronounced sensitivity to the electric field with an evolving peak at −80 MPa, which was not observed at 100 °C. The disappearance of the evolving peak with increasing temperature suggests a strong influence of the crystallographic phase on the electromechanical properties of (Li,Na,K)NbO3-based multilayers. Further investigations of the stress–strain loop and stress–polarization change revealed that the field-dependent peak below 100 °C was due to the non-180° domain orientation induced by the combined electric field and compressive stress.