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题名: Surface-condensed piezoelectric fibers and composites
作者: Horng-Yi Chang
Chung-Hao Yi
Chia-Hsin Lin
Syh-Yuh Cheng
贡献者: 國立臺灣海洋大學:輪機工程學系
日期: 2014-12
上传时间: 2018-09-04T01:35:00Z
出版者: Materials Chemistry and Physics
摘要: Abstract: An extrusion process that combined the surface condensation reaction was used to fabricate PZT fibers to exhibit a smooth surface and a circular morphology, with favorable manipulation strength. The sintered fibers showed more tetragonality. The electromechanical coupling coefficient and the resonant frequency of the PZT fibers had increased, while the aspect ratio of length to diameter (R) was larger than 2.8. Single PZT fibers with R > 2.8 showed larger remanent and saturation polarization values than the 1-3 composite and the PZT bulk. The dielectric constant and saturation polarization were in proportion to the volume filling percentage of the PZT fibers in the 1-3 composite. The piezoelectric coefficient increased with the fraction of the PZT fibers after a threshold volume fraction of 58 vol% was reached. As a proposed mechanism, the boric acid-PVA condensation reaction was initiated at the extruded fiber surface to form a capsule-like web to protect the extruded PZT fiber surface, increase the fiber strength, maintain the circular morphology, and facilitate fiber manipulation.
關聯: 148(3) pp.512-518
显示于类别:[輪機工程學系] 期刊論文


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