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
High piezoelectricity in (K,Na)(Nb,Sb)O3–(Bi,La,Na,Li)ZrO3 lead-free ceramics
TL;DR: In this article, a lead-free piezoelectric system of (1−−x)K0.48Na0.5ZrO3 [(1− ǫ)KNa 0.52+y NS-xBLNLZ] was prepared using the conventional solid-state sintering method, and the effects of BLNLZ content and Na excess on the microstructure and electrical properties were investigated.
Journal ArticleDOI
Effect of sintering temperature on the microstructure and electrical properties of zirconium doped barium titanate ceramics
TL;DR: In this paper, the effect of increasing sintering temperature in the range of 1,350-1,450°C on the microstructure, dielectric, polarization, and electric field induced strain of the lead-free Ba(Zr0.15Ti0.85)O3 (BZT15) ceramics was studied.
Journal ArticleDOI
Composition induced structure evolution and large strain response in ternary Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-SrTiO3 solid solution
TL;DR: In this article, a ternary perovskite lead-free solid solution Bi0.5Na 0.5K 0.3-SrTiO3 was designed and fabricated using a conventional fabrication process.
Journal ArticleDOI
Enhanced d33 value of Bi0.5Na0.5TiO3–(Ba0.85Ca0.15)(Ti0.90Zr0.10)O3 lead-free ceramics
TL;DR: In this paper, a stable solid solution is well formed between BNT and BCTZ, and the d 33 value of (1−− x )BNT-x BCTz ceramics with x ǫ = 0.06 demonstrates a temperature independence and a poling electric field dependence.
Journal ArticleDOI
Correspondence: Lead-free intravascular ultrasound transducer using BZT-50BCT ceramics
TL;DR: The experimental results suggest that the BZT-50BCT ceramic is a promising lead-free piezoelectric material for high-frequency intravascular imaging applications.
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.