The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Tao Wang - One of the best experts on this subject based on the ideXlab platform.
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composition induced structure evolution and large Strain Response in ternary bi0 5na0 5tio3 bi0 5k0 5tio3 srtio3 solid solution
Journal of Applied Physics, 2013Co-Authors: Feifei Wang, Yanxue Tang, Chung Ming Leung, Tao WangAbstract:A ternary perovskite lead-free solid solution Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-SrTiO3 was designed and fabricated using a conventional fabrication process. The temperature and composition dependence of the ferroelectric, dielectric, piezoelectric, and electromechanical properties were systematically investigated, and a schematic phase diagram was established. The introduction of the SrTiO3 was found to induce a structure evolution from the ferroelectric rhombohedra to ergodic relaxor pseudocubic phases. At a critical composition with SrTiO3 of 0.15, large Strain level of ∼0.25% was obtained under a moderate field of 4.4 kV/mm at 0.1 Hz and the normalized Strain reached up to 585 pm/V. Through the combination of the X-ray diffraction results with the piezoResponse force microscopy analysis, the composition induced structure evolution process and intrinsic mechanism responsible for the large Strain Response were discussed. The large Strain level also makes the system quite promising for application to “on-off” ...
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large Strain Response in the ternary bi0 5na0 5tio3 batio3 srtio3 solid solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
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Large Strain Response in the Ternary Bi0.5Na0.5TiO3–BaTiO3–SrTiO3 Solid Solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
Jiwei Zhai - One of the best experts on this subject based on the ideXlab platform.
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Large Strain Response in Bi4Ti3O12 modified BNT-BT piezoelectric ceramics
Ceramics International, 2016Co-Authors: Peng Li, Bo Shen, Jiwei Zhai, Lingyu Li, Huarong ZengAbstract:Abstract In this paper, a novel system of lead-free piezoelectric ceramics 0.94(Bi 0.5 Na 0.5 )TiO 3 −0.06BaTiO 3 -xBi 4 Ti 3 O 12 (abbreviated as BNT-BT-xBiT) were prepared by the solid-state reaction method. The effects of Bi 4 Ti 3 O 12 dopant on the Strain behavior, dielectric, ferroelectric and piezoelectric performance of BNT-BT ceramics were systematically investigated. A optimal Strain value of ~0.37% was achieved around the critical composition of x=6 wt% which corresponds to a normalized Strain ( S max / E max ) of 465 pm/V. The large Strain Response in this sample is mainly originated from two aspects: one is that BiT addition induced ferroelectric-to-relaxor phase transition evidenced by “pinched” ferroelectric hysteresis loops and vanished negative Strain of bipolar Strain loops as well as downward shift of T F-R ; the other is that the small-sized nanodomains (or polar nanoregions) facilitate the domain switching and domain wall motion with an applied electric field, which lead to large external contribution to Strain Response. These results indicate that BNT-BT-xBiT piezoelectric ceramics with large Strain Response may be a promising lead-free material for actuator application.
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effect of different templates on structure evolution and large Strain Response under a low electric field in textured lead free bnt based piezoelectric ceramics
Journal of The European Ceramic Society, 2015Co-Authors: Junhua Xi, Bo Shen, Jun Zhang, Jiwei ZhaiAbstract:Abstract -textured 0.83Na0.5Bi0.5TiO3–0.17Bi0.5K0.5TiO3 (BNT–BKT) ceramics with high degree of texturing (>80%) were synthesized by templated grain growth using different perovskite plate-like BaTiO3, SrTiO3 and NaNbO3 as template particles to develop lead-free piezoelectric materials with an excellent actuating performance. The effects of different template particles addition to BNT–BKT ceramics on the grain orientation, structure evolution, phase stability and macroscopic functional properties was systematically investigated. BaTiO3 template particles addition to form -textured BNT–BKT–BT textured ceramics suppresses an electric-field-induced long-range ferroelectric order, giving rise to a high field-induced Smax/Emax of 710 pm/V under a relatively low driving field of 45 kV/cm compared with existing lead-free Bi-perovskite ceramics. In particular, temperature-dependent Strain Response reveals that -textured BNT–BKT–5BT ceramics exhibit not only large Smax/Emax at a low driving field of 45 kV/cm at room temperature but also enhanced the temperature stability of Smax/Emax featured by large Smax/Emax of 517 pm/V at high temperature.
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switching of morphotropic phase boundary and large Strain Response in lead free ternary bi0 5na0 5 tio3 k0 5bi0 5 tio3 k0 5na0 5 nbo3 system
Journal of Applied Physics, 2013Co-Authors: Bo Shen, Jiwei Zhai, Xiaolong LiAbstract:In this work, we report the phase diagram of lead-free ternary (1 - y)[(1 - x)(Bi0.5Na0.5) TiO3-x (Bi0.5K0.5)TiO3]-y(K0.5Na0.5)NbO3 (BNT-BKT-KNN) system and study the switching characteristics of the morphotropic phase boundary (MPB). The addition of KNN intrinsically changes the structural nature of the system with the shift of MPB from MPB(I) between ferroelectric rhombohedral and ferroelectric tetragonal phases to MPB(II) between ferroelectric rhombohedral and relaxor pseudocubic phases. As the MPB(I) switches to MPB(II), large piezoelectric Response with d(33) similar to 150pC/N that obtained for BNT-0.20BKT near MPB(I) almost disappears. Instead, a significant jump of electric-filed-induced Strain S up to 0.32%-0.46% (S-max/E-max = 400-575 pm/V) is achieved near MPB(II) due to the shift of the ferroelectric-relaxor transition temperature TF-R down to room temperature. In this study, giant Strain similar to 0.46% occurs in a very narrow region in the BNT-BKT-KNN system with x = 0.20, y = 0.01, which lies on an underlying tricritical triple point of a rhombohedral (R), tetragonal (T), and pseudocubic (Pc) phases. In-situ high-energy X-ray scattering experiments with external electric field reveal an initial electric-field-induced distortion from the Pc structure for the MPB(II) compositions, while those with single R phase shows no such distortion, which suggests that the large Strain achieved near the MPB(II) is likely to be induced by the electric-field-induced structure distortion due to its relative instability structure. We believe that the discovery of a compositional line in the pseudo-ternary system, where the Strain Response is consistently derivable, should be useful for designing high-performance piezoelectric materials in other BNT-based systems by searching MPBs. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795511]
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the composition and temperature dependent structure evolution and large Strain Response in 1 x bi0 5na0 5 tio3 xba al0 5ta0 5 o3 ceramics
Journal of the American Ceramic Society, 2013Co-Authors: Yanlong Bian, Bo Shen, Jiwei ZhaiAbstract:The (1−x) (Bi0.5Na0.5)TiO3−xBa(Al0.5Ta0.5)O3((1−x)BNT-xBAT) lead-free piezoceramics was fabricated using a conventional solid-state reaction method. The temperature and composition-dependent Strain behavior, dielectric, ferroelectric (FE), piezoelectric, and pyroelectric properties have been systematically investigated to develop lead-free piezoelectric materials with large Strain Response for actuator application. As the BAT content increased, the FE order is disrupted resulting in a degradation of the remanent polarization, coercive field, and the depolarization temperature (Td). A large Strain of 0.36% with normalized Strain d33* = 448pm/V was obtained for the optimum composition x = 0.045 at room temperature. The bipolar and unipolar Strains for the compositions x = 0.035 and x = 0.04 reach almost identical maximum values when the temperature is in the vicinity of their respective depolarization temperature (Td). The Raman-spectra analysis, macroscopic properties, thermal depolarization results, and temperature-dependent relationships of both polarization and Strain demonstrated that the origin of the large Strain Response for this investigated system is attributed to a field-induced relaxor to FE phase transformation.
Chung Ming Leung - One of the best experts on this subject based on the ideXlab platform.
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composition induced structure evolution and large Strain Response in ternary bi0 5na0 5tio3 bi0 5k0 5tio3 srtio3 solid solution
Journal of Applied Physics, 2013Co-Authors: Feifei Wang, Yanxue Tang, Chung Ming Leung, Tao WangAbstract:A ternary perovskite lead-free solid solution Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-SrTiO3 was designed and fabricated using a conventional fabrication process. The temperature and composition dependence of the ferroelectric, dielectric, piezoelectric, and electromechanical properties were systematically investigated, and a schematic phase diagram was established. The introduction of the SrTiO3 was found to induce a structure evolution from the ferroelectric rhombohedra to ergodic relaxor pseudocubic phases. At a critical composition with SrTiO3 of 0.15, large Strain level of ∼0.25% was obtained under a moderate field of 4.4 kV/mm at 0.1 Hz and the normalized Strain reached up to 585 pm/V. Through the combination of the X-ray diffraction results with the piezoResponse force microscopy analysis, the composition induced structure evolution process and intrinsic mechanism responsible for the large Strain Response were discussed. The large Strain level also makes the system quite promising for application to “on-off” ...
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large Strain Response in the ternary bi0 5na0 5tio3 batio3 srtio3 solid solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
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Large Strain Response in the Ternary Bi0.5Na0.5TiO3–BaTiO3–SrTiO3 Solid Solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
Feifei Wang - One of the best experts on this subject based on the ideXlab platform.
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composition induced structure evolution and large Strain Response in ternary bi0 5na0 5tio3 bi0 5k0 5tio3 srtio3 solid solution
Journal of Applied Physics, 2013Co-Authors: Feifei Wang, Yanxue Tang, Chung Ming Leung, Tao WangAbstract:A ternary perovskite lead-free solid solution Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-SrTiO3 was designed and fabricated using a conventional fabrication process. The temperature and composition dependence of the ferroelectric, dielectric, piezoelectric, and electromechanical properties were systematically investigated, and a schematic phase diagram was established. The introduction of the SrTiO3 was found to induce a structure evolution from the ferroelectric rhombohedra to ergodic relaxor pseudocubic phases. At a critical composition with SrTiO3 of 0.15, large Strain level of ∼0.25% was obtained under a moderate field of 4.4 kV/mm at 0.1 Hz and the normalized Strain reached up to 585 pm/V. Through the combination of the X-ray diffraction results with the piezoResponse force microscopy analysis, the composition induced structure evolution process and intrinsic mechanism responsible for the large Strain Response were discussed. The large Strain level also makes the system quite promising for application to “on-off” ...
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large Strain Response in the ternary bi0 5na0 5tio3 batio3 srtio3 solid solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
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Large Strain Response in the Ternary Bi0.5Na0.5TiO3–BaTiO3–SrTiO3 Solid Solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
Yanxue Tang - One of the best experts on this subject based on the ideXlab platform.
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composition induced structure evolution and large Strain Response in ternary bi0 5na0 5tio3 bi0 5k0 5tio3 srtio3 solid solution
Journal of Applied Physics, 2013Co-Authors: Feifei Wang, Yanxue Tang, Chung Ming Leung, Tao WangAbstract:A ternary perovskite lead-free solid solution Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-SrTiO3 was designed and fabricated using a conventional fabrication process. The temperature and composition dependence of the ferroelectric, dielectric, piezoelectric, and electromechanical properties were systematically investigated, and a schematic phase diagram was established. The introduction of the SrTiO3 was found to induce a structure evolution from the ferroelectric rhombohedra to ergodic relaxor pseudocubic phases. At a critical composition with SrTiO3 of 0.15, large Strain level of ∼0.25% was obtained under a moderate field of 4.4 kV/mm at 0.1 Hz and the normalized Strain reached up to 585 pm/V. Through the combination of the X-ray diffraction results with the piezoResponse force microscopy analysis, the composition induced structure evolution process and intrinsic mechanism responsible for the large Strain Response were discussed. The large Strain level also makes the system quite promising for application to “on-off” ...
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large Strain Response in the ternary bi0 5na0 5tio3 batio3 srtio3 solid solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
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Large Strain Response in the Ternary Bi0.5Na0.5TiO3–BaTiO3–SrTiO3 Solid Solutions
Journal of the American Ceramic Society, 2012Co-Authors: Feifei Wang, Min Xu, Yanxue Tang, Tao Wang, Chung Ming LeungAbstract:A ternary solid solution (0.935-x)Bi0.5Na0.5TiO3–0.065BaTiO3–xSrTiO3 was designed and fabricated using a conventional fabrication process. Temperature and composition dependence of the ferroelectric, dielectric, and piezoelectric properties were systematically investigated and a schematic phase diagram was established. The SrTiO3 substitution was found to induce a transition from ferroelectric to relaxor pseudocubic phases. Around a critical composition x of 0.22, large Strain Response of ~0.2% (under a moderate field of 4 kV/mm) with normalized Strain of 490 pm/V was obtained. The large unipolar Strain Response would be of great interest for environmental-friendly “on-off” actuators.
