共查询到18条相似文献,搜索用时 93 毫秒
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压电陶瓷变压器是一种新型的压电换能器件,它在结构与特性上和传统的线绕铁芯电磁变压器有很大的区别,本文对压电陶瓷变压器(多层)的发展历史、主要制造工艺、工作原理及应用技术作简要的讨论。 相似文献
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目前在能源工业、航空航天、汽车等领域,对可在高温环境中稳定可靠工作的压电器件需求迫切。高居里温度压电材料是是高温压电器件核心敏感元件,对高温压电材料研究也越来越受重视。该文对具有高居里温度压电材料的结构和性能特点做出简要分析,并概述高温压电材料的研究进展,总结了今后的发展方向和热点问题。 相似文献
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压电陶瓷微位移驱动器概述 总被引:12,自引:0,他引:12
利用压电陶瓷的逆压电效应,可制成微位移驱动器。对该类器件的性能特点、分类、应用概况,压电陶瓷材料本质对该器件性能的影响,材料的选择及发展趋势等方面进行了介绍。 相似文献
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关于无铅压电陶瓷及其应用的几个问题 总被引:33,自引:1,他引:32
综合分析无铅压电陶瓷在压电陶瓷材料中的地位,指出要想让无铅压电陶瓷完全取代铅基压电陶瓷在现阶段是不可能的,但对大量的压电中端应用和低端应用,无铅压电陶瓷材料与器件大有用武之地;给出了目前无铅压电陶瓷研究的主要体系,包括BaTiO3基无铅压电陶瓷、Bi1/2Na1/2TiO3(BNT)基无铅压电陶瓷和铌酸盐系无铅压电陶瓷;分析了当前无铅压电陶瓷研究开发应注意的问题,并对今后研究开发的相关方向,如提高机电耦合系数(k)、压电常数(d)和机械品质因数(Qm)等,提出了一些建议。 相似文献
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Yang Yang Jiayi Sun Weifan Cai Zheng Liu Corinne Dejous Magali De Matos Hamida Hallil Qing Zhang 《Advanced functional materials》2023,33(29):2300104
Conventional bulk and thin piezoelectric materials based film bulk acoustic resonators (FBARs) are facing an insurmountable challenge for millimetric frequency applications due to the poor piezoelectric properties of the materials when their thickness reaches the sub-micron regime. Novel FBARs for ultra-high working frequencies are in urgent demand to meet the requirements of the fast-growing 5/6G telecommunication techniques. Recent advances in 2D piezoelectric nanomaterials create an opportunity in this perspective. Here, the first FBAR chip based on 2D 3R-MoS2 ultrathin piezoelectric flakes with a solidly mounted resonator (SMR) architecture is reported. The typical resonant frequency for an SMR device based on ≈200 nm 3R-MoS2 flake reaches over 25 GHz with high reproducibility. Theoretical and finite element analysis suggest that the observed resonance is of longitudinal acoustic modes. This study demonstrates for the first time that the access to 2D piezoelectric nanomaterials makes high performance piezoelectric devices feasible for various promising applications including high-speed telecommunication, acousto-optic, and sensor fields,etc. 相似文献
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压电聚合物驻极体材料的现状与动态 总被引:1,自引:0,他引:1
综述了压电聚合物驻极体材料的现状和进展。聚偏氟乙烯(PVDF)家族作为一类传统的压电、热释电和铁电聚合物,30余年来已研制出成百种功能元器件,近年来仍颇具活力。以奇数尼龙、亚乙烯基二氰共聚物及聚脲为代表的发展中有机压电材料,可望明显地扩展PVDF家族的应用范围,但它们中的大多数仍待产业化。而近年来发展起来的以聚丙烯蜂窝膜和聚四氟乙烯多孔膜为代表的新一代空间电荷型多孔压电传感膜,由于揉合了压电陶瓷和铁电聚合物PVDF家族的各自优势,从而在压电性及其功能应用方面成为极具竞争力的空间电荷型聚合物压电功能材料。 相似文献
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The use of piezoceramic materials for structural sensing and actuation is a fairly well developed practice that has found use in a wide variety of applications. However, just as advanced composites offer numerous benefits over traditional engineering materials for structural design, actuators that utilize the active properties of piezoelectric fibers can improve upon many of the limitations encountered when using monolithic piezoceramic devices. Several new piezoelectric fiber composites have been developed; however, almost all studies have implemented these devices such that they are surface‐bonded patches used for sensing or actuation. This paper will introduce a novel active piezoelectric structural fiber that can be laid up in a composite material to perform sensing and actuation, in addition to providing load bearing functionality. The sensing and actuation aspects of this multifunctional material will allow composites to be designed with numerous embedded functions, including structural health monitoring, power generation, vibration sensing and control, damping, and shape control through anisotropic actuation. This effort has developed a set of manufacturing techniques to fabricate the multifunctional fiber using a SiC fiber core and a BaTiO3 piezoelectric shell. The electromechanical coupling of the fiber is characterized using an atomic force microscope for various aspect ratios and is compared to predictions made using finite element modeling in ABAQUS. The results show good agreement between the finite element analysis model and indicate that the fibers could have coupling values as high as 68% of the active constituent used. 相似文献
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本文讨论了压电和铁电薄膜材料及其在固体器件中应用的发展趋势。薄膜生长技术的进展,为压电和铁电薄膜集成固体器件在各个领域的应用开辟了广阔的前景。ZnO和AIN薄膜将广泛地用于SAW和BAW器件。特别是成功地制作了薄膜体声波谐振器和高次谐波体波谐振器。以PbTiO_3为基的PZT和PLZT固溶体外延薄膜将应用于热电探测器和SAW器件。在实现了对多层薄膜的界面结构及其特性的成功控制之后,铁电薄膜将在铁电存储和集成光学领域发挥重要作用。 相似文献
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压电石英晶体具有高Q值和高稳定的性能,用它作成的体声波谱振器件有十分优良的稳定频率、选择频率和传感的功能,具有损耗低、体积小、寿命长和可靠性高的特点.广泛地应用于军、民用的各种电子装置中,是现代电子工程中不可缺少的关键元器件.文章综述性地介绍了各种体声波器件的应用特点及现代电子工程对其提出越来越高的要求;对当前国内外的技术水平、发展趋势及采用新技术的途径等均分别作了叙述. 相似文献
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Photostrictive effect exhibits a fascinating ability to directly convert light into mechanical strain, which enables a facile and straightforward approach to realize the wireless and remote control of the micro-electromechanical systems (MEMS). It provides a great potential to upgrade the existing electric-driven mechanical devices to optomechanical devices by replacing or integrating electrostriction, piezoelectric effect, or magnetostriction. Although this effect can be dated back to the 1960s, it should not be overlooked as a unique photophysical phenomenon. Especially in the passing decade, it has regained widespread attention, triggered by the emerging characterization techniques and new material systems, as well as the booming progress of MEMS. The recent progress of this fast-growing field is summarized by emphasizing the up-to-date characterization techniques and several new material systems. Furthermore, the potential applications of the photostrictive effect are also comprehensively reviewed. It is hoped that this article will promote the development of photostrictive effect, to not only deepen the research on the underlying mechanisms, but also accelerate the exploration of high-performance photostrictive materials, so as to meet the upcoming challenges faced by light as a major energy source in the foreseeable future. 相似文献