Frequency and temperature dependence of actuating performance of Bi_(1/2)Na_(1/2)TiO_3-BaTiO_3 based relaxor/ferroelectric composites

Claudia Groh; Wook Jo; Jurgen Rodel

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Frequency and temperature dependence of actuating performance of Bi_(1/2)Na_(1/2)TiO_3-BaTiO_3 based relaxor/ferroelectric composites

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Recently, composites of relaxors (matrix) and either ferroelectric or nonergodic relaxor (seed) were proposed as a solution to resolving one of the main drawbacks of incipient piezoceramics, namely the requirement for high driving electric fields. In this study, we investigate the temperature and frequency dependence of the actuating performance of Bi_(1/2)Na_(1/2)TiO_3-BaTiO_3-based composites. Apart from the reduction of driving field, the composite architecture offers an extra degree of freedom for tailoring the temperature stability for different operational conditions for actuators. High strain values appear to be sensitive especially to driving frequency. This is originated by the time-dependent process of the coalescence of polar nanoregions. In effect, proximity of driving field and poling field leads to high strain sensitivity. Hence, the driving electric field needs to be adjusted in order to meet the desired frequency specifications for given applications.

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《Journal of Applied Physics》 |2014年第23期|234107-1-234107-6|共6页
作者
Claudia Groh; Wook Jo; Jurgen Rodel;
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作者单位

Institute of Materials Science, Technische Universitat Darmstadt, Darmstadt 64287, Germany;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种英语
中图分类应用物理学;
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Frequency and temperature dependence of actuating performance of Bi_(1/2)Na_(1/2)TiO_3-BaTiO_3 based relaxor/ferroelectric composites

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