Journal ArticleDOI
Large Piezoelectric Effect in Pb-Free Ceramics
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TLDR
It is predicted that the single-crystal form of the MPB composition of the present system may reach a giant d(33) = 1500-2000 pC/N, which may provide a new recipe for designing highly piezoelectric materials (both Pb-free and P b-containing) by searching MPBs starting from a TCP.Abstract:
We report a non-Pb piezoelectric ceramic system Ba(Ti(0.8)Zr(0.2))O(3)-(Ba(0.7)Ca(0.3))TiO(3) which shows a surprisingly high piezoelectric coefficient of d(33) approximately 620 pC/N at optimal composition. Its phase diagram shows a morphotropic phase boundary (MPB) starting from a tricritical triple point of a cubic paraelectric phase (C), ferroelectric rhombohedral (R), and tetragonal (T) phases. The high piezoelectricity of the MPB compositions stems from the composition proximity of the MPB to the tricritical triple point, which leads to a nearly vanishing polarization anisotropy and thus facilitates polarization rotation between 001T and 111R states. We predict that the single-crystal form of the MPB composition of the present system may reach a giant d(33) = 1500-2000 pC/N. Our work may provide a new recipe for designing highly piezoelectric materials (both Pb-free and Pb-containing) by searching MPBs starting from a TCP.read more
Citations
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Journal ArticleDOI
Strong and anisotropic magnetoelectricity in composites of magnetostrictive Ni and solid-state grown lead-free piezoelectric BZT–BCT single crystals
Haribabu Palneedi,Venkateswarlu Annapureddy,Ho-Yong Lee,Jong-Jin Choi,Si-Young Choi,Sung-Yoon Chung,Suk-Joong L. Kang,Jungho Ryu +7 more
TL;DR: In this paper, a lead-free magnetoelectric (ME) composites with performances as good as lead-based ones were developed. But their performance was limited by the BZT-BCT pie.
Journal ArticleDOI
Effects of criticality and disorder on piezoelectric properties of ferroelectrics.
TL;DR: The piezoelectric response of BaTiO(3) is studied in the vicinity of the cubic to tetragonal phase transition, as a function of temperature and the applied electric field in the polar direction, and the influence of disorder is investigated.
Journal ArticleDOI
Rational design of nanomaterials for high energy density dielectric capacitors via electrospinning
TL;DR: In this article, the rational design of nanofillers and nanocomposites for high energy density dielectric capacitors via electrospinning, including filler preparation, dispersion, orientation and distribution, is summarized.
Journal ArticleDOI
Giant current performance in lead-free piezoelectrics stem from local structural heterogeneity
TL;DR: In this paper, a lead-free (Ba0.85Ca0.15)0.001TZ (BCSm0.9Zr0.1)O3) piezoelectric ceramic was developed for energy harvesting.
Journal ArticleDOI
Interface Optimization and Electrical Properties of 0.5Ba(Zr0.2Ti0.8)O3–0.5(Ba0.7Ca0.3)TiO3 Thin Films Prepared by a Sol–Gel Process
TL;DR: In this article, a seed layer was added to the 0.5Ba(Zr0.2Ti0.7Ca0.3)TiO3 (0.5BZT-0.6BCT) thin film to achieve low interfacial diffusion and high (100) orientation.
References
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Journal ArticleDOI
Lead-free piezoceramics
Yasuyoshi Saito,Hisaaki Takao,Toshihiko Tani,Tatsuhiko Nonoyama,Kazumasa Takatori,Takahiko Homma,Toshiatsu Nagaya,Masaya Nakamura +7 more
TL;DR: A lead-free piezoelectric ceramic with an electric-field-induced strain comparable to typical actuator-grade PZT is reported, achieved through the combination of the discovery of a morphotropic phase boundary in an alkaline niobate-based perovskite solid solution, and the development of a processing route leading to highly textured polycrystals.
Journal ArticleDOI
Ultrahigh strain and piezoelectric behavior in relaxor based ferroelectric single crystals
Seung Eek Park,Thomas R. Shrout +1 more
TL;DR: In this article, the piezoelectric properties of relaxor based ferroelectric single crystals, such as Pb(Zn1/3Nb2/3)O3 and PbTiO3, were investigated for electromechanical actuators.
Journal ArticleDOI
Polarization rotation mechanism for ultrahigh electromechanical response in single-crystal piezoelectrics
Huaxiang Fu,Ronald E. Cohen +1 more
TL;DR: It is shown that a large piezoelectric response can be driven by polarization rotation induced by an external electric field, and the computations suggest how to design materials with better performance, and may stimulate further interest in the fundamental theory of dielectric systems in finite electric fields.
Journal ArticleDOI
Lead-free piezoelectric ceramics: Alternatives for PZT?
Thomas R. Shrout,Shujun Zhang +1 more
TL;DR: In this paper, the intrinsic nature of the dielectric and piezoelectric properties of Pb(Zr,Ti)O3 is compared with the various families of soft and hard PZTs.
Journal ArticleDOI
Large electric-field-induced strain in ferroelectric crystals by point-defect-mediated reversible domain switching.
TL;DR: It is shown that with a different mechanism, an aged BaTiO3 single crystal can generate a large recoverable nonlinear strain of 0.75% at a low field of 200 V mm−1.