Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 43
·16407-16419
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IF 8.067
Kaiyuan Chen,Tianxiang Yan,Jia Liu,Xiuyun Lei,Liang Fang,Biaolin Peng,Senentxu Lanceros-Méndez,Dawei Wang,Laijun Liu,Qi Zhang
0.6Bi(Mg0.5Ti0.5)O3–0.4Ba0.8Ca0.2(Ti0.875Zr0.125)O3 (0.6BMT–0.4BCZT) ceramics exhibit an ultrahigh dielectric thermal stability. In this work, the relationship between the local structure and the physical properties of this system is revealed using in situ XRD, in situ Raman, TEM and dielectric responses. It is found that the formation and freezing of both polar nanoregions (PNRs) and nanomosaic structures (NMSs) that comprise ferroelectrically active Ba/Ti rich and weakly polar Bi (and Mg) rich phases are responsible for the high dielectric thermal stability. Three dielectric anomalies, i.e. low-temperature re-entrant dipole-glass-like relaxor behavior, mid-temperature diffuse phase transition (DPT), and high-temperature local phase transitions can be described using the phenomenological statistical model. Furthermore, the relaxor behavior follows the Vogel–Fulcher law and the new glass model. The dipole-glass-like relaxor nature of 0.6BMT–0.4BCZT was characterized by P–E loops. The beta value obtained from the isothermal electrical modulus shows three critical temperatures corresponding to the formations of PNRs, NMS and local phase transition of calcium-containing perovskites.
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Zhenhui Zhang,Xiangluo Miao,Xiangbin Zhang,Shibang Zhang,Changan Wang,Deyang Chen,Min Zeng,Xingsen Gao
NaNbO 3 (NN)-based ceramics have received a great deal of attention for the potential application in dielectric energy storage capacitors. However, the energy storage properties (ESP) remain low, particularly under moderate electric field. Herein, a Bi-rich doping unit of BiMg 2/3 Nb 1/3 O 3 (BMN) was introduced into a 0.85NaNbO 3 -0.15Bi 0.1 Sr 0.85 TiO 3 (NN-SBT) matrix, aiming to improve polarization along ESP. As a result, a large recoverable energy density ( W rec ) of ∼6.1 J/cm 3 and an efficiency ( η ) of ∼81 % were achieved in NN-SBT-0.08BMN ceramics under a moderate electric field of 337 kV/cm. The improved ESP can be attributed to the introduction of BMN, which delays the polarization saturation of NN-SBT ceramics, while maintaining the maximum polarization (∼43.6 μC/cm 2 ), and generating polar nanoregions (PNRs). Moreover, the optimal ceramics exhibited good thermal (25–130 °C) and frequency (1–300 Hz) stabilities, and fatigue endurance (>10 5 cycles). These results illustrate that the designed NN-SBT-0.08BMN ceramics are promising for application in dielectric energy storage capacitors with high ESP under a moderate electric field.
研究领域:
材料科学
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物理学
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DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Shiyi Zhang,Dongyan Zhang,Yangxi Yan,Maolin Zhang,Zhimin Li,Pangpang Wang,Ri-ichi Murakami
Relaxor ferroelectrics are complex materials with properties that are remarkably different from traditional ferroelectrics, and they have the ability to probe frequency-dependent dielectric susceptibility. However, the empirical laws developed for traditional ferroelectrics also apply to relaxor ferroelectrics. Here we report an abnormally improved dielectricity of the La-doped relaxor ferroelectric 0.4PNN-0.6PHT, which does not linearly vary with the piezoelectric coefficient, as it is expected. A mesoscale mechanism is proposed to explain the origin of the improved dielectric response of 0.4PNN-0.6PHT, in which the alignment of polar nano regions facilitates the polarization response to the external field. This mechanism demonstrates the critical role of polarization fluctuation for the macroscopic properties of 0.4PNN-0.6PHT.
研究领域:
材料科学
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物理学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yinghao Zhu,Yumei Tan,Kao Pei,Denghui Jiang,Linzhuang Xing,Hongyu Yang,Bolei Cai,Liang Kong,Zhimin Li
The BiFeO 3 –BaTiO 3 piezoelectric ceramic possesses high Curie temperature, rendering it a promising candidate material for high-temperature piezoelectric actuators, yet the low strain and undesired temperature stability have to be resolved. In this study, the piezoelectric system 0.95(0.7BiFeO 3 –0.3BaTiO 3 )–0.05(Ba 0.6 Sr 0.4 )TiO 3 (BF–BT–BST) was probed with Hf modification. Results demonstrate that the introduction of Hf 4+ ions promotes the phase transition from the rhombohedral to the pseudocubic, leading to the formation of polar nanoregions (PNRs). With increasing Hf 4+ level, the freezing temperature gradually decreases from 297 °C to 31 °C, and Hf modification activates the activity of PNRs at room temperature, creating a more responsive relaxation state of PNRs to external electric fields. Consequently, the modification increases the strain up to 0.45 % and results in a good temperature stability of 17 % from 25 °C to 200 °C for the sample with 0.75 % Hf. The findings present an effective strategy for improving the strain and temperature stability in BF–BT–based piezoelectric ceramics.
研究领域:
材料科学
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物理学
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yutao Zhang,Xiaohua Zhang,Pei Zhang,Yongqi Zhang,Peng Shi,Zhenxing Yue
Lead-free materials for energy storage are increasingly receiving attention due to their exceptional properties of high charging and discharging rates, high power density, and eco-friendliness. In this work, (1− x )Bi 0.5 Na 0.5 TiO 3 - x Bi(Ni 0.5 Hf 0.5 )O 3 (BNT-BNH, x = 0.05, 0.10, 0.15 and 0.20) ceramics were prepared for electrostatic energy storage. P - E loops results show that the introduction of Ni 2+ and Hf 4+ induces the formation of polar nanoregions (PNRs) and the phase transition from ferroelectric to relaxor ferroelectric in BNT ceramics. Transmission Electron Microscopy directly confirm the increase of crystal plane spacing implies a good solid solution of BNT-BNH, and the number of spherical PNRs increases significantly with increasing the BNH content. Herein, a recoverable energy storage density of 2.68 J/cm 3 and relative efficiency of 72.1 % are achieved for 0.8BNT-0.2BNH ceramics under 210 kV/cm. The 0.8BNT-0.2BNH ceramics also exhibit a fast discharge rate ( t 0.9 = 76 ns), high current density (403.1 A/cm 2 ), and high power density (12.85 MW/cm 3 ), which illustrates that BNT-BNH material systems have good application potential in electrostatic energy storage.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Qiong Li,Hao Qian,Tianyang Zheng,Xiaoyuan Sun,Yunfei Liu,Yinong Lyu
The cation displacement closely related to the local symmetry and corner-connected oxygen octahedral rotation are the structural origin of macroscopic properties in ABO 3 perovskite oxides. This work describes in detail the relationship between microstructure and macroscopic properties in 0.78BT-0.12CT-0.1BZS ceramic, which achieves the enhanced strain of 0.19 % with a hysteresis of 6.56 %. The atomic level structure is revealed by aberration corrected scanning transmission electron microscope (AC-STEM). The AC-STEM HAADF images reveal the coexisting of polar nanoregions with O and T symmetries. Such a microstructure has a lower energy barrier, facilitating dynamic polarization rotation flexibly under external stimuli. The AC-STEM ABF image reveals the existence of the BO 6 octahedral rotation, with rotation patterns of the a 0 b 0 c 0 and a - b + c - , and rotation angles are quantitatively measured. The BO 6 octahedral rotation and cation displacement are found to be consistent, the greater octahedral rotation with greater cation displacements. These results have important implications for understanding the structural origin of the excellent properties in ferroelectrics .
研究领域:
材料科学
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凝聚态物理
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuai Chen,Ting Wang,Shaoxiong Xie,Jiaju Leng,Qingfeng Zhu,Kai Li,Weiping Gong,Jianguo Zhu,Qingyuan Wang
Dielectric capacitors are employed extensively due to their exceptional performance, including a rapid charge–discharge speed and superior power density. However, their practical implementation is hindered by constraints in energy-storage density (ESD), efficiency (ESE), and thermal stability. To achieve domain engineering and improved relaxor behavior in 0.67BiFeO3-0.33BaTiO3-based Pb-free ceramics, the concerns have been addressed here by employing a synergistic high-entropy strategy involving the design of the composition of Sr(Mg1/6Zn1/6Ta1/3Nb1/3)O3 with B-site multielement coexistence and high configuration entropy. Remarkably, in (0.67-x)BiFeO3-0.33BaTiO3-xSr(Mg1/6Zn1/6Ta1/3Nb1/3)O3 ceramics with x = 0.08, a good ESE (η) of 75% and a recoverable ESD (Wrec) of 2.4 J/cm3 at 190 kV/cm were attained together with an ultrahigh hardness of ∼7.2 GPa. The high-entropy strategy, which is tailored by an increase in configuration entropy, can be attributed to the superior mechanical and ES properties. It also explains the enhanced random field and relaxation behavior, the structural coexistence of ferroelectric rhombohedral (R3c) and nonpolar pseudocubic (Pm-3m) symmetries, the decreased domain size, and evenly distributed polar nanoregions (PNRs). Moreover, improved thermal stability and outstanding frequency stability are also obtained. By boosting the configuration entropy, BiFeO3–BaTiO3 materials dramatically improved their complete energy storage performance. This suggests that designing high-performance dielectrics with high entropy can be a convenient yet effective technique, leading to the development of advanced capacitors.
研究领域:
材料科学
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能源工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Tengfei Yu,Xiang Ji,Zhijun Fu,Baorui Xia,Subin Jiang,Meizhen Gao
Ba 0.85- x (Bi 0.58 Na 0.42 ) x Ca 0.15 Ti 0.85 Zr 0.15 O 3 (BCTZ- x BN) was employed as the research focus to modulate grain size, lattice distortion, and defect concentration by adjusting the BN content, thereby regulating energy storage performance. The influence mechanisms of grain size, lattice distortion, and defect concentration on energy storage performance were investigated through experimental and numerical calculations. Experimental characterization (XRD diffraction, high-resolution transmission electron microscopy, and impedance testing) and theoretical analysis (V-F model, macroscopic and phenomenological models, and Landau Devonshire theory) revealed that the polar nanoregions (PNRs) induced by lattice distortion and charge defects improved energy storage efficiency. Finite element simulation and impedance analysis indicate that fine grain size and fewer charge defects contribute to improved breakdown strength. As a result, the W rec and η of the modified samples were significantly improved by 6 and 1.7 times, respectively. This work provides insights into the design of high-performance ceramic capacitors and establishes a theoretical framework for understanding the energy storage mechanism.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2024
·Vol. 136
·期 7
·
IF 2.7
Zha Jielin,Yang Yulong,Liu Jiaxun,Lu Xiaomei,Hu Xueli,Yan Shuo,Wu Zijing,Zhou Min,Huang Fengzhen,Ying Xuenong,Zhu Jinsong
Although K 0.5 Na 0.5 NbO 3 (KNN) possesses large maximum polarization and relatively high breakdown strength, the large remnant polarization constrains their practical applications as energy storage materials. In this work, through multi-element doping, (K 0.5−0.5 x Na 0.5−0.5 x Bi x )(Nb 1− x Sn 0.2 x Zn 0.6 x Ta 0.2 x )O 3 relaxor ferroelectrics were prepared. As the superparaelectric states (SPE) were adjusted to room temperature, orthorhombic, tetragonal, and cubic phases coexisted, accompanied by the highly dynamic polar nanoregions (PNRs). In particular, a high recoverable energy storage density of 4.5 J/cm 3 and an energy storage efficiency of 83% were achieved for the x = 0.125 ceramic, with the variations less than 11% and 4%, respectively, in the wide temperature range of 20–180 °C. These results demonstrate that the multiphase PNRs in the SPE state is an effective strategy for improving the energy storage performance of KNN-based ceramics.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Feng Luo,Denghui Jiang,Yinghao Zhu,Yumei Tan,Hongyu Yang,Zhimin Li
The high strain hysteresis has impeded lead-free piezoelectric ceramics to replace lead zirconate titanate ceramics applied in actuators. In this study, we report a significant advancement with the synthesis of a novel BiFeO 3 -BaTiO 3 -(Ba 0.6 Sr 0.4 )TiO 3 (BF-BT-BST) system. The optimal composition has demonstrated a remarkable strain of 0.42 % coupled with a notably low hysteresis of 21 %. It is found that the incorporation of BST into BF-BT facilitates the transition from the rhombohedral phase to the pseudo-cubic phase, which in turn significantly enhances the relaxor ferroelectric characteristics of the ceramic. Through adjusting the composition proportion of BST, a unique ferroelectric domain structure is established for the BF-BT-0.04BST ceramic, where polar nanoregions (PNRs) are surrounded by ferroelectric macrodomains. The domain structure enables the ceramic to have the ability to respond the external electric field quickly compared to the PNRs for typical relaxor composition, thereby leading to large strain and low hysteresis simultaneously. Hence, it is inferred that the ferroelectric macrodomains simplify the response process of the PNRs under electric field. This study provides an efficient strategy to break through the bottleneck of large strain hysteresis for BF-BT ceramic, and gives a deep comprehension for the improvement of the strain characteristics.
研究领域:
材料科学
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固体力学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 2
·1-14
·
IF 2.8
Guan Riyu,Chen Kaiyuan,Han Feifei,Yuan Zhi,Wang Dingyuan,Bai Yisong,Chen Xue,Peng Biaolin,Yan Shiguang,Yu Dongyan,Lei Xiuyun,Liu Laijun
High efficiency ( η ) is urgently desired for electronic energy storage devices. In this work, an extremely high energy storage efficiency (~ 99.5%) and energy storage density of 2.83 J/cm 3 are achieved in lead-free relaxor ferroelectric (1– x )(0.9BaTiO 3 –0.1BiMg 0.5 Ti 0.5 O 3 )- x Bi(Mg 0.5 Sn 0.5 )O 3 [(1– x ) (0.9BT–0.1BMT)– x BMS] ceramic ( x = 0.09). Excellent temperature stability with a variation of η less than 1.5% is also obtained in a wide temperature range from 30 to 150 °C. Temperature dependence of the dielectric permittivity of (1– x )(0.9BT–0.1BMT)- x BMS exhibits a typical dipolar-glass-like relaxor ferroelectric behavior. As a result, the ultra-high efficiency of the ceramic is attributed to the weak-coupling polar nanoregions (PNRs) which are analyzed using the Vogel-Fulcher formula and phenomenological statistical model. These results not only help to understand the origin of high efficiency in the (1– x )(0.9BT–0.1BMT)- x BMS system but also provide an effective approach to improve the comprehensive properties of other lead-free ceramic systems used in next-generation power capacitors.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Zhuo Yu,Jiangtao Zeng,Liaoying Zheng,Anthony Rousseau,Guorong Li,Abdelhadi Kassiba
Lead-free BiFeO 3 –BaTiO 3 –Bi(Mg 2/3 Nb 1/3 )O 3 (BFBT-BMN) ceramics with different grain sizes were fabricated by using a conventional solid-state reaction. The high-energy ball milling technique was utilized to obtain the fine-grained ceramics. The grain size reduction lowers the remanent polarization ( P r ) and enhances the dielectric breakdown strength ( E b ) leading to a drastic increase of the recoverable energy storage density ( W re ). For the fine-grained BFBT-BMN ceramics, W re greatly increases by 8 times from 0.16 J/cm 3 to 1.27 J/cm 3 , compared to the coarse-grained BFBT-BMN ceramics. Transmission electron microscopy (TEM) and piezo-response force microscopy (PFM) measurements revealed the occurrence of the polar nanoregions (PNRs) in the fine-grained BFBT-BMN ceramics. The dynamic and weakly correlated PNRs structure is responsible for the enhancement of recoverable energy storage density in the fined-grained BFBT-BMN ceramics. This work indicates that the grain size reduction is an effective way to modify the energy storage properties of BiFeO 3 -based ferroelectric ceramics .
研究领域:
材料科学
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能源存储
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电子显微学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）