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
Microstructural evolution in NaNbO3-based antiferroelectrics
TL;DR: In this article, a thorough transmission electron microscope study was performed to illustrate the CaZrO3 doping-assisted antiferroelectricity stabilization in NaNbO3 ceramics.
Journal ArticleDOI
Notable grain-size dependence of converse piezoelectric effect in BaTiO3 ceramics
TL;DR: In this paper, a group of BaTiO 3 ceramics that are fabricated through solid-state reaction route and show various average grain sizes were investigated for converse piezoelectric effect.
Journal ArticleDOI
Effects of Mg doping on electrical properties of Ba0.7Ca0.3TiO3 ceramics
TL;DR: In this article, the phase transition temperature, ferroelectricity and piezoelectricity were observed in correlation with the decrease in tetragonality, and the results suggested that the electrical properties of this ceramic may be largely tunable by Mg dopant.
Journal ArticleDOI
Influence of niobium substitution on structural and opto-electrical properties of BNKT piezoelectric ceramics
TL;DR: In this paper, the structural and opto-electrical properties of lead free niobium modified piezoelectric ceramics Bi0.5Na0.25K 0.25NbxTi1-xO3 (BNKT) (x = 0.0, 0.015 and 0.025) were investigated.
Journal ArticleDOI
Piezoelectric energy harvesting and charging performance of Pb(Zn1/3Nb2/3)O3–Pb(Zr0.5Ti0.5)O3 nanoparticle-embedded P(VDF-TrFE) nanofiber composite sheets
Kaihua Liu,Hong Je Choi,Byeong Kon Kim,Da Bin Kim,Chan Su Han,Seung Won Kim,Han Byul Kang,Han Byul Kang,Jin Woo Park,Yong Soo Cho +9 more
TL;DR: In this paper, a specific piezoelectric composition of 0.4Pb(Zn1/3Nb2/3)O3 (PZN-PZT) has been selected for better energy harvesting performance.
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.