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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High thermally stable dielectric permittivity, polarization enhancement and electrostrictive properties in Zr-substituted bismuth sodium titanate lead-free ferroelectric ceramics
Li Jin,Yunyao Huang,Jing Pang,Leiyang Zhang,Ruiyi Jing,Dong Guo,Hongliang Du,Xiaoyong Wei,Zhuo Xu,Xu Lu,Fangbin Wei,Gang Liu +11 more
TL;DR: In this paper, the structural, dielectric and ferroelectric properties of BNTZ ceramics were investigated using solid-state reaction technique and their structural and energy efficiency were investigated systematically.
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Large electromechanical strain at high temperatures of novel textured BiFeGaO3-BaTiO3 based ceramics
J. Peng,J. Peng,Liu Wenbin,Jiangtao Zeng,Liaoying Zheng,Guorong Li,Anthony Rousseau,Alain Gibaud,Abdelhadi Kassiba +8 more
TL;DR: In this paper, textured and random BFG-BT ceramics were realized by the solid state reaction method with and without BaTiO3 (BT) templates, and the electromechanical strain, polarization and dielectric behavior were correlated to the textured or random forms of the BFGbased ceramic.
Journal ArticleDOI
Dielectric, Ferroelectric, and Piezoelectric Properties of Mn-Doped K0.5Na0.5NbO3 Lead-Free Ceramics
TL;DR: In this paper, a study of manganese-doped potassium-sodium niobate ceramics was performed and it was found that, with increasing Mn2+ content from 1.5% to 1.6% with no appreciable detriment in piezoelectric properties, the Q m changed from 60 to near 500.
Journal ArticleDOI
Effect of MgO addition on sintering temperature, crystal structure, dielectric and ferroelectric properties of lead-free BZT ceramics
TL;DR: MgO addition Ba(Zr0.15Ti0.85)O3 (BZT) was prepared using conventional solid state reaction method and effect the MgO content in BZT ceramics on their sintering temperature, microscopic appearance, dielectric properties and ferroelectric properties was investigated as mentioned in this paper.
Journal ArticleDOI
Phase Formation, Dielectric and Ferroelectric Properties of Mn, Al Doped BCZT Ceramics by Molten Salt Method
Uraiwan Intatha,Piewpan Parjansri,Kamonpan Pengpat,Gobwute Rujijanagul,Tawee Tunkasiri,Sukum Eitssayeam +5 more
TL;DR: In this article, the phase formation and dielectric properties of the BCZT-CaxZr0.1Ti0.9O3 were analyzed by X-ray Diffraction (XRD) and electrical measurement.
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.