共查询到17条相似文献,搜索用时 93 毫秒
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论述压电陶瓷在高精度领域的不同应用,包括压电陶瓷对物体微小形变测量、压电陶瓷作为传感元件与谐振器结合应用、压电传感技术在应力测量领域应用、压电陶瓷作为驱动器在纳米定位领域应用、压电陶瓷对材料构件损伤识别、压电陶瓷在无损检测领域应用、基于相移干涉法对三维表面微观轮廓检测等;描述压电材料分类以及特性;深度剖析压电陶瓷在当前科技发展阶段不同工业领域的应用,分析目前研究中的难点,展望未来的研发方向。 相似文献
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综述了无铅压电陶瓷研究开发的相关进展,着重介绍了BaTiO3基无铅压电陶瓷、Bi1/2Na1/2TiO3(BNT)基无铅压电陶瓷、NaNbO3基无铅压电陶瓷、铋层状结构无铅压电陶瓷及钨青铜结构无铅压电陶瓷等不同陶瓷种类的相关体系、制备方法及压电铁电性能,并对其应用及发展前景进行了展望。 相似文献
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无铅压电陶瓷的开发与应用是当今压电陶瓷发展的必然趋势,本文综合分析了无铅压电陶瓷的研究背景,给出了钙钛矿型无铅压电陶瓷的主要体系,包括钛酸钡基无铅压电陶瓷、BNT基无铅压电陶瓷,分析比较了其性能及研究现状。 相似文献
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压电材料的研究发展方向和现状 总被引:3,自引:0,他引:3
概述了目前压电材料的主要研究发展方向,详细介绍了弛豫铁电单晶、压电复合材料和高温压电陶瓷;并对三元及多元系压电陶瓷、压电薄膜、细晶粒压电陶瓷和无铅压电陶瓷进行了简要讨论。 相似文献
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Anisotropic piezoelectricity has been intensively investigated in PbZrO3 - or PbTiO3 -based perovskite ceramics, in comparison with the isotropic characteristic in the intermediate composition of the solid-solution Pb(Zr, Ti)O3 system. In order to explain the piezoelectric anisotropy, a phenomenological treatment is proposed for a perovskite sublattice system, including electromechanical coupling terms. Electrostrictive couplings, especially between the two sublattices, provide significant contribution to the piezoelectric anisotropy. 相似文献
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以导电碳黑(CB)为导电相、压电陶瓷(PZT)为压电相、聚氨酯(PU)为基体制备了一系列的压电阻尼复合材料(PU/CB/PZT)。研究了CB、PZT对所制备材料的耐击穿性能的影响,探讨了材料的压电性能和阻尼性能随PZT含量以及极化时间的变化规律。结果表明,PU/CB/PZT压电阻尼复合材料的压电常数随PZT含量和极化时间增加而增加,当极化场强选为5 kV/mm、极化时间30 min、PU/CB/PZT质量份为100/4/80时,材料的压电性能最佳,达到45.7 PC/N。随着PZT用量和极化时间增加,压电阻尼复合材料的阻尼因子峰值提高。 相似文献
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Xiaodan Ren Yike Wang Mingyang Tang Xin Liu Zhuo Xu Yongke Yan 《Journal of the American Ceramic Society》2023,106(9):5331-5340
[001] textured 0.40BiScO3-0.60PbTiO3-0.125 mol%Nb5+ (BS-60PT-0.125Nb) high-temperature piezoelectric ceramics were synthesized using templated grain growth process. A high texture degree F001 of 99% was obtained using 2 vol% BaTiO3 (BT) templates. The piezoelectric charge constant d33 and the unipolar strain under 40 kV cm−1 at room temperature for the textured ceramics are 646 pC N−1 and 0.36%, respectively, which is over two times as those for untextured ceramics (∼243 pC N−1 and 0.17%). The electrostriction Q33 value of the textured sample remarkably increased from 0.034 m4 C−2 to 0.068 m4 C−2 under 30 kV cm−1, showing a twice higher than untextured. Compared with random ceramics, the improvement piezoelectric response of the textured ceramics is primarily attributed to the increase of the dielectric constant εr and electrostriction coefficient Q33 along [001] orientation, which is originating from the anisotropy of piezoelectricity. The BS-60PT-0.125Nb textured ceramics have large piezoelectric response and ultrahigh electrostriction with high temperature stability (high depolarization temperature Td of ∼360°C and high Curie temperature Tc of 421°C), showing great potential for the piezoelectric applications at high temperatures. 相似文献
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本文采用新型溶胶-凝胶制粉技术和传统陶瓷生产工艺制备了0.93Bi0.5Na0.5TiO3-0.07Ba1-xMgxTiO3(简称BNBMT100x)体系无铅压电陶瓷,并对BNBMT陶瓷的晶相特征及其介电和压电性能进行了讨论。XRD分析表明,陶瓷样品均形成了单一的钙钛矿结构固溶体;Mg的加入对陶瓷的介电、压电性能有显著影响;陶瓷的铁电-顺电相变峰显著降低、展宽;介电损耗在室温至200℃范围内较平缓。当x=0.04时,机电耦合系数kp和kt最大,分别为16%和19%,压电常数d33值为111pC/N。 相似文献
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无铅压电陶瓷制备方法的研究进展 总被引:1,自引:0,他引:1
无铅压电陶瓷的开发和应用已经成为各个国家的研究热点。本文从粉体制备方法和晶粒定向生长技术两个方面综述了近几年无铅压电陶瓷主要制备方法(如溶胶-凝胶法、水热法、熔盐法、热处理技术等)的研究进展,最后对其今后的发展方向做出了展望。 相似文献
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Katy S. Gerace John C. Mauro Clive A. Randall 《Journal of the American Ceramic Society》2021,104(5):1915-1944
Piezoelectric materials have coupled mechanical and electrical energies and have long been used in devices for actuators, sensors, energy harvesters, frequency filters, and various additional applications. Piezoelectricity requires a non-centrosymmetric crystal structure and is therefore confined to materials that possess a periodic crystalline structure. Due to the non-crystalline nature of glass, piezoelectricity is fundamentally forbidden. However, one way to exploit piezoelectric properties in a glassy matrix is by developing glass-ceramics that possess controlled growth of a crystalline phase. Growth and orientation of piezoelectric crystals in a glassy matrix is a non-trivial process that has long been explored to combine the formability of glass with the thermal and mechanical resilience of glass-ceramics. While extensive work has been done in the field of functional glass-ceramics, the results are presented in isolated articles and a comprehensive review pertaining to symmetry breaking methods to exploit anisotropic properties in glass-ceramics has been absent from the literature. Here, we present a global review of the fundamental symmetry requirements for piezoelectricity, the development of polar, piezoelectric glass-ceramic compositions (specifically those with LiNbO3 and fresnoite-based crystal phases), and various crystal growth and orientation mechanisms, including relevant kinetic and thermodynamic driving forces. Lastly, we discuss the challenges associated with implementing gradients to drive oriented crystal growth to develop non-centrosymmetry, and the need for future modeling work to produce adequate time-temperature-transformation (TTT) diagrams that take into account kinetic and thermodynamic driving forces for oriented crystal growth. Going beyond technical challenges, we conclude with an examination of current and potential applications for piezoelectric glass-ceramics that combine the formability of glass with the symmetry-dependent properties of ceramics. 相似文献