Journal ArticleDOI
Large Piezoelectric Effect in Pb-Free Ceramics
Reads0
Chats0
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
More filters
Journal ArticleDOI
Microscopic origins of the large piezoelectricity of leadfree (Ba,Ca)(Zr,Ti)O3
Yousra Nahas,A. R. Akbarzadeh,Sergei Prokhorenko,Sergey Prosandeev,Sergey Prosandeev,Raymond Walter,Igor Kornev,Jorge Íñiguez,Laurent Bellaiche +8 more
TL;DR: In this paper, the authors used an atomistic model to show the electromechanical properties are due to a complex microstructure and polarization fluctuations in the narrowly stable orthorhombic phase.
Journal ArticleDOI
Enhanced Piezoelectric Properties of Praseodymium-Modified Lead-Free (Ba0.85Ca0.15)(Ti0.90Zr0.10)O3 Ceramics
Indrani Coondoo,Neeraj Panwar,Harvey Amorín,Venkata Eskilla Ramana,Miguel Algueró,Andrei L. Kholkin +5 more
TL;DR: The role of praseodymium (Pr) addition on the structure, microstructure, electrical, and electromechanical properties of lead-free (Ba0.85Ca0.15)(Ti0.90Zr0.10)O3 piezoelectric ceramics has been systemically investigated as mentioned in this paper.
Journal ArticleDOI
High piezoelectric coefficient of Pr2O3-doped Ba0.85Ca0.15Ti0.90Zr0.10O3 ceramics
TL;DR: In this paper, a tetragonal phase is observed in these ceramics, and the introduction of Pr 2 O 3 decreases their sintering temperature without affecting negatively the piezoelectric constant.
Journal ArticleDOI
Microstructure, Ferroelectric, Piezoelectric, and Ferromagnetic Properties of Sc-Modified BiFeO3–BaTiO3 Multiferroic Ceramics with MnO2 Addition
Yang Wan,Ying Li,Qiang Li,Wei Zhou,Qiaoji Zheng,Xiaochun Wu,Chenggang Xu,Benpeng Zhu,Dunmin Lin +8 more
TL;DR: In this article, the effects of Sc doping and sintering temperature on microstructure, multiferroic, and piezoelectric properties of the ceramics were studied.
Journal ArticleDOI
Large piezoelectric properties induced by doping ionic pairs in BaTiO 3 ceramics
TL;DR: In this article, the authors show that the optimized distribution of Li + Al 3+ pairs parallel to the [0, 0, 1] direction can generate unit cells of less than tetragonal symmetry, and these low-symmetry cells can be responsible for the high piezoelectric response.
References
More filters
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.