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
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Journal ArticleDOI
Low sintering temperature and high piezoelectric properties of Li-doped (Ba,Ca)(Ti,Zr)O3 lead-free ceramics
Xiaoming Chen,Xiaoming Chen,Xuezheng Ruan,Kunyun Zhao,Xueqing He,Jiangtao Zeng,Yongsheng Li,Liaoying Zheng,Chul Hong Park,Guorong Li +9 more
TL;DR: Li-doped Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 O 3 (BCZT) lead-free piezoelectric ceramics were prepared by the two-step synthesis and the solid-state reaction method as mentioned in this paper.
Journal ArticleDOI
Optimizing electrical poling for tetragonal, lead-free BZT–BCT piezoceramic alloys
TL;DR: In this paper, the authors showed that the piezoelectric properties of tetragonal BZT-BCT materials have been improved by using the field cooling poling method, and the optimum poling temperature lies near the Curie temperatures for a broad range of compositions.
Journal ArticleDOI
Lead-free piezoelectric materials and composites for high power density energy harvesting
Deepam Maurya,Mahesh Peddigari,Min Gyu Kang,Liwei D. Geng,Nathan Sharpes,Venkateswarlu Annapureddy,Haribabu Palneedi,Rammohan Sriramdas,Yongke Yan,Hyun Cheol Song,Yu U. Wang,Jungho Ryu,Shashank Priya,Shashank Priya +13 more
TL;DR: In this article, a review of the state-of-the-art studies on vibration and magnetic field harvesting is provided and the results are used to discuss various strategies for designing high-performance energy harvesting devices.
Journal ArticleDOI
Nanodomain Engineered (K, Na)NbO3 Lead‐Free Piezoceramics: Enhanced Thermal and Cycling Reliabilities
TL;DR: In this article, a CaZrO3-modified (K, Na)NbO3 piezoceramics not only possess excellent performance at ambient conditions benefiting from nanodomain engineering, but also exhibit superior stability against temperature fluctuation and electrical fatigue cycling.
Journal ArticleDOI
Composition-dependent xBa(Zr0.2Ti0.8)O3-(1-x)(Ba0.7Ca0.3)TiO3 bulk ceramics for high energy storage applications
A. R. Jayakrishnan,Kevin V. Alex,Athul Thomas,José Silva,Koppole Kamakshi,Navneet Dabra,Koppole C. Sekhar,J. Agostinho Moreira,M. J. M. Gomes +8 more
TL;DR: In this article, AR Jayakrishnan acknowledges Central University of Tamil Nadu, India for his Ph.D fellowship, and is grateful for the financial support through the FCT Grant SFRH/BPD/92896/2013.
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.