Materials
·
2022
·Vol. 15
·期 17
·5881
·
IF 3.748
Yuleng Jiang,Xiang Niu,Wei Liang,Xiaodong Jian,Hongwei Shi,Feng Li,Yang Zhang,Ting Wang,Weiping Gong,Xiaobo Zhao,Yingbang Yao,Tao Tao,Bo Liang,Shengguo Lu
Owing to the high power density, excellent operational stability and fast charge/discharge rate, and environmental friendliness, the lead-free Na0.5Bi0.5TiO3(NBT)-based relaxor ferroelectrics exhibit great potential in pulsed power capacitors. Herein, novel lead-free (1−x)(0.7Na0.5Bi0.5TiO3-0.3Sr0.7Bi0.2TiO3)-xBi(Mg0.5Zr0.5)O3(NBT-SBT-xBMZ) relaxor ferroelectric ceramics were successfully fabricated using a solid-state reaction method and designed via compositional tailoring. The microstructure, dielectric properties, ferroelectric properties, and energy storage performance were investigated. The results indicate that appropriate Bi(Mg0.5Zr0.5)O3content can effectively enhance the relaxor ferroelectric characteristics and improve the dielectric breakdown strength by forming fine grain sizes and diminishing oxygen vacancy concentrations. Therefore, the optimalWrecof 6.75 J/cm3and aηof 79.44% were simultaneously obtained in NBT-SBT-0.15BMZ at 20 °C and 385 kV/cm. Meanwhile, thermal stability (20–180 °C) and frequency stability (1–200 Hz) associated with the ultrafast discharge time of ~49.1 ns were also procured in the same composition, providing a promising material system for applications in power pulse devices.Keywords:Na0.5Bi0.5TiO3;lead-free;relaxor ferroelectrics;compositional tailoring;energy storage
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Mengdi Cheng,Mo Zhao,Shiyi Zhang,Yangxi Yan,Zhimin Li,Pangpang Wang,Ri-Ichi Murakami,Dongyan Zhang
High-performance piezoelectric materials are widely used in electromechanical applications such as sensors, actuators, and transducers. Herein, improvement in electrical properties of Pb(Ni 1/3 Nb 2/3 )O 3 −Pb(In 1/2 Nb 1/2 )O 3 −PbTiO 3 relaxor ferroelectrics by modulating the polymorphism of nano-scale domain is reported, and piezoelectric coefficients d 33 and d 33 * as high as 948 pC/N and 1108 pm/V, respectively, are achieved. The high piezoelectric response is elucidated by combining cryogenic dielectric , Rayleigh analysis, and scanning electron microscopy with piezoresponse force microscope. During the transition from the tetragonal to rhombohedral phase, the morphology of the ferroelectric domains changes significantly, mesoscopic domain destruction is observed, and thus nano-scale domains appear as an extrinsic contribution of piezoelectricity. In addition, nano-scale domains promote polarization rotation, thus, improving the piezoelectric response. The improved piezoelectric performance demonstrates good thermal stability, retaining the inverse piezoelectric coefficient of approximately 1000 pm/V near 70 °C. This work provides a good example of improving ceramics' piezoelectric response by modulating the polymorphism of nanoscale domains.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Qinqiang Guo,Zhonghua Dai,Chenxi Liu,Yuanyuan Zheng,Xin Zhao,Weiguo Liu,Yu Cong,Shuitao Gu
The energy issue is currently a highly significant topic of concern, and the development of environmentally friendly and high-performance lead-free energy storage devices is fundamental to solving energy problems, but it also poses challenges. Lead-free environmentally friendly (Bi 0.5 Na 0.5 )TiO 3 [BNT] has attracted widespread attention due to its high polarization, but its low efficiency greatly affects its practical application. In this study, 1- x (Bi 0.5 Na 0.5 )TiO 3 - x Ca(Ti 0.8 Ta 0.16 )O 3 [1- x BNT- x CTT]ceramics were prepared to investigate the relationship between their microstructure and macro energy storage properties. With the introduction of CTT, the long-range order was broken, reducing the grain size; the introduction of high bandgap energy Ta 2 O 5 reduced residual polarization and improved the energy storage efficiency of the ceramics. Finally, high energy storage ( W rec = 3.01 J/cm 3 ) and high energy storage efficiency ( ƞ = 90 %) were achieved in the 0.7BNT-0.3CTT ceramics, and the breakdown field strength was increased to 350 kV/cm, with excellent discharge performance ( P D of 28.97 MW/cm 3 , t 0.9 of 1.9 μs). This study explores lead-free relaxor ferroelectric energy storage capacitors with high efficiency under high electric fields, providing a new approach to optimize the energy storage performance of ceramic energy storage devices.
研究领域:
材料科学
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能源存储
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Gang Liu,Jia Dong,Leiyang Zhang,Yan Yan,Ruiyi Jing,Li Jin
In the present work, the nature of phase evolution of (1− x )(Na 0.5 Bi 0.5 )TiO 3 - x SrTiO 3 (NBT- x ST) solid solutions with x of 0–0.6 is revealed by characterizing the dielectric and ferroelectric properties. Two unique dielectric anomalies associated with high-temperature nanoregions (PNRs) in the ergodic relaxor (ER) state and low-temperature PNRs in the nonergodic relaxor (NR) state are identified. Characteristic temperatures, including T B , T RT∗ , T m , T d and T T ∗ , are determined in fresh and poled states on the basis of the characteristics of the evolution of these two dielectric anomalies. The whole evolution of the transition from the NR state to the ER state is reflected by the temperature-dependent polarization versus electric field ( P - E ) hysteresis loops, i.e., from the square loops, via the double-like loops, to the slim loops. The characteristic temperatures, including T P-N , T N-R and T R-dis , are determined by the characteristics of the evolution of P - E loops. Accordingly, a phase diagram of NBT- x ST was constructed according to these characteristic temperatures. Most importantly, the relationship between polarization responses and heterogeneous polar phase coexistence has been established and a schematic diagram is given. This work will help to understand the phase evolution and its impact on the macroscopic properties of NBT and the associated NBT-based solid solutions.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2014
·Vol. 97
·期 6
·1797-1801
·
IF 2.428
Xuechen Huang,Hua Hao,Shujun Zhang,Hanxing Liu,Wenqin Zhang,Qi Xu,Minghe Cao
(1− x )BaTiO 3 – x BiYO 3 [(1− x )BT– x BY] polycrystalline ceramics were prepared by solid-state reaction method. The ceramics are in tetragonal phase when x ≤ 0.04, transform to pseudocubic at x ≥ 0.06, showing a classic ferroelectric to relaxor transition at x = 0.06, where the phase transition temperature was found to shift to higher temperature with increasing frequency. The dielectric permittivity peaks were analyzed by the modified Curie–Weiss law. Both parameters ΔT diffuse and ΔT relaxor were found to increase with increasing BY content, demonstrating a stronger relaxor characteristic.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Gang Liu,Huanghui Nie,Leiyang Zhang,Xinyu Zeng,Yazhong Zheng,Xinyu Chen,Xinran Wang,Kun Yu,Li Jin,Yan Yan
To acquire giant electric field-induced strain in non-Pb materials is attracting a great deal of attention in the past decade. In the current investigation, the crystal and domain structures as well as the electrical performances of (1- x ) (0.94Bi 0.5 Na 0.5 TiO 3 -0.06BaTiO 3 )- x NaTaO 3 (BNBT- x NT) specimens were systematically studied to achieve enhanced strain. The introduction of NT makes the phase structure transit from rhombohedral-tetragonal to pseudo-cubic structure. The original domain structure of BNBT is destroyed, and the disorder degree of the local structure increases. Simultaneously, the remnant polarization, coercive field, and piezoelectric coefficients were significantly decreased. The transition from ferroelectric to ergodic relaxation can be effectively modified, thus lowering the transition zone to room temperature. Finally, the BNBT-3NT ceramics achieve marked strain coefficients at room temperature, with a maximum strain of 0.394% under 65 kV/cm and a d 33 * of 606 pm/V.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Xiao-Dong Jian,Biao Lu,Dan-Dan Li,Ying-Bang Yao,Tao Tao,Bo Liang,Jin-Hong Guo,Yi-Jiang Zeng,Jia-Le Chen,Sheng-Guo Lu
Barium zirconate titanate (BZT) (Ba(ZrxTi1–x)O3) ceramics with Zr4+ contents of x = 5, 10, 15, 20, 25, and 30 mol % were prepared using a solid-state reaction approach. The microstructures, morphologies, and electric properties were characterized using X-ray diffraction, scanning electron microscopy, and impedance analysis methods, respectively. The dielectric analyses indicate that the BZT bulk ceramics show characteristics of phase transition from a normal ferroelectric to a relaxor ferroelectric with the increasing Zr4+ ionic content. The electrocaloric effect adiabatic temperature change decreases with the increasing Zr4+ content. The highest adiabatic temperature change obtained is 2.4 K for BZT ceramics with a 5 mol % of Zr4+ ionic content.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Shengdong Sun,Ye Liu,Yueyun Zhang,Lu Wang,Shiqing Deng,Yang Ren,He Qi,Hui Liu,Jun Chen
Improving piezoelectric performance is always favorable to further enhance the sensitivity and accuracy of piezoelectric devices. Here, a complex piezoelectric system of Pb(Ni 1/3 Nb 2/3 )O 3 -Pb(Yb 1/2 Nb 1/2 )O 3 -Pb(Hf 0.1 Ti 0.9 )O 3 is designed and investigated in detail. Optimized piezoelectric response of ∼ 880 pC/N is achieved at the composition of 0.51PNN-0.09PYN-0.40PHT. The characterization of TEM and In-situ high-energy synchrotron diffraction indicate that nanodomain growth and microdomain switching occurs in succession at around coercive electric field. Most interestingly, the coexisted tetragonal and rhombohedral-like phase transforms into multiple monoclinic-like phases with polarization vectors aligned as close to the electric field direction as possible under the strong electric field. The enhanced polarization instability in this complex morphotropic phase boundary sample should be ascribed to the strong local heterogeneity. The novel polarization rotation behavior found in this work would be important guidance for designing high-performance piezoceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Changshuai Shu,Jiachen Xi,Chongyang Li,Wangfeng Bai,Peng Zheng,Peng Li,Jiwei Zhai
Constructing relaxor ferroelectrics (RFEs) in dielectrics is an efficient approach to break the so-called inverted relations between recoverable energy storage density ( W rec ) and efficiency ( η ). However, in view of the requirement for energy conservation, the major challenge of realizing near-zero energy consumption (ultrahigh η ) accompanied with high W rec still remains in the field of dielectric energy storage. Here, we designed a linear-like RFE with directly induced short-range local polar nanoregions via incorporating the ferroelectric into linear dielectric to realize high-performance capacitive storage, especially near-zero energy loss. Benefiting from linear-like RFE design, the combination of enhanced breakdown strength, ultrasmall dielectric loss, and minimized polarization hysteresis synergistically contributes to a record-high η of ∼97.7 % with a high W rec of 5.87 J/cm 3 and ultrahigh figure of merit of 255, which is ahead of most recently reported state-of-the-art lead-free ceramics. Moreover, based on such linear-like RFE merits, high thermal/frequency stability and cycling durability with high η > 90 % of the designed ceramics expand their applications in harsh condition energy storage systems. This study demonstrates the superiority of linear-like RFE design and provides a referential paradigm towards developing advanced near-zero energy loss energy storage dielectrics.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
InfoMat
·
2022
·Vol. 5
·期 1
·e12362
·
IF 24.798
Lu Wang,He Qi,Shiqing Deng,Lingzhi Cao,Hui Liu,Shuxian Hu,Jun Chen
Electrostrictive materials have wide applications in modern high-precision electronic devices. Driven by growing environmental concerns, there is demand for lead-free materials with superior electrostriction behaviors. In this study, we demonstrate a record-high electrostrictive coefficient of ~0.0712 m 4 C −2 in perovskite ferroelectric ceramics, along with hysteresis-free strain as well as excellent frequency and thermal stabilities, in lead-free BaTiO 3 -based ceramics through a polarization nanocluster design. By appropriately introducing Li + and Bi 3+ into the BaTiO 3 lattice matrix, the long-range ferroelectric ordering can be broken, and polarization nanoclusters can be formed, resulting in a relaxor state with concurrently suppressed polarization and maintained electro-strain. A three-dimensional atomic model constructed using advanced neutron total-scattering data combined with the reverse Monte Carlo method indicates the existence of Bi and Li segregations at the subnanometer scale, which confirms the prediction made by density functional theory calculations. Such a short-range chemical order destroys the long-range ferroelectric order of the off-centered Ti polar displacements and leads to the embedding of Li + /Bi 3+ -rich polar nanoregions in the Ba 2+ -rich polarization disorder matrix. Further, a completely reversible electric-field-induced lattice strain is observed, giving rise to pure electrostriction without hysteresis behavior. This work provides a novel strategy for developing lead-free relaxor ferroelectrics with high electrostriction performance.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Jian Guo,Huifen Yu,Yifeng Ren,He Qi,Xinrui Yang,Yu Deng,Shan-Tao Zhang,Jun Chen
Relaxor ferroelectric ceramics with remarkable energy storage performance, which is dominantly determined by polarization and breakdown strength , are one of the bottlenecks for next generation high/pulsed power dielectric capacitors. Herein, we report that high-entropy composition Li 2 CO 3 -densified Bi 0.2 Na 0.2 Ba 0.2 Sr 0.2 Ca 0.2 TiO 3 achieves a giant recoverable energy density ( W rec ) of 10.7 J/cm 3 and an ultrahigh efficiency ( η ) of 89 %. To understand the mechanism, the influence of the high-entropy effect on atomic-scale polarization configuration and macroscale electrical properties has been investigated systematically. Randomly distributed A-site ions and B-site ions form complex interactions, which lead to coexisted atomic-scale low crystallographic symmetries, and thus, high-dynamic polar nanoregions as well as “intermediate polarization”, such multiple symmetry polarization configuration ensures fast and strong polarization response. On the other hand, the high-entropy system exhibits a wide band gap, helping to reduce conductivity and delay breakdown. Moreover, stable high-entropy structure brings great advantages for enhancing the thermal/frequency stability of energy storage performance. This work not only provides a material candidate with outstanding comprehensive energy storage performance but also affirms high-entropy approach is a shortcut to optimizing functional property by multi-scale interactions between polarization, microstructure and crystal structure.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 4
·1302-1312
·
IF 8.067
Hui Tang,Xiang Niu,Peng-Fei Zhao,Xin-Gui Tang,Xiao-Dong Jian,Xian-Yi Chen,Xiao-Cao Peng,Zhi-Peng Yang,Sheng-Guo Lu
xBiFeO3–(1 − x)BaTiO3 relaxor ferroelectric ceramics were synthesized via the high-temperature solid-state reaction process. The X-ray diffraction patterns of xBiFeO3–(1 − x)BaTiO3 showed that the structure of samples was transformed from the tetragonal phase to the pseudo-cubic phase when x ≥ 0.025. The calculated universal Curie–Weiss constants and slim shape of the polarization-electric field hysteresis loops indicated that xBiFeO3–(1 − x)BaTiO3 ceramic was converted from a normal ferroelectric to a relaxor ferroelectric. The energy-storage properties of 0.1BiFeO3–0.9BaTiO3 were also measured at room temperature. The maximum discharged energy density and efficiency procured were 1.22 J cm−3 and 85.98%, respectively. The electric field-dependent energy-storage density was fitted using an exponential function of En, and it was found that n < 2. It was worth noting that the positive electrocaloric effect (ECE) was observed in xBiFeO3–(1 − x)BaTiO3 bulk ceramics, no matter when directly measured using a thermocouple or indirectly calculated using the Maxwell relation. Also, a ΔTmax of 1.55 K was indirectly calculated from the temperature-dependent P–E hysteresis loops for 0.05BiFeO3–0.95BaTiO3; while a ΔTmax of 2.20 K was directly obtained using the thermocouple. The positive ECE means that the xBiFeO3–(1 − x)BaTiO3 is a conventional ferroelectric or relaxor ferroelectric. Finally, the electrocaloric strengths measured were considered with the equation dT/dE obtained by Lu et al.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
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