CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Lin Tang,Xuefan Zhou,Muhammad Habib,Jinzhu Zou,Xi Yuan,Yan Zhang,Dou Zhang
As a promising lead-free high-temperature piezoelectric material , BiFeO 3 –BaTiO 3 (BF-BT) is still under debate on its crystal structure, especially for the compositions in the morphotropic phase boundary (MPB). Herein, the crystal structure of (1- x )BF- x BT ceramics near the MPB with x = 0.20–0.33 was analyzed by X-ray diffraction and Raman spectroscopy . With the addition of BT, the phase transition from distorted rhombohedral to pseudo-cubic structure was determined by Rietveld refinement . Raman analysis showed the weakening interactions between the A-site cations and BO 6 octahedron, as well as the degenerated distortions of BO 6 octahedron. Intriguingly, the results of X-ray photoelectron spectroscopy suggested the inhibition of Fe 3+ reduction and decrease in oxygen vacancy concentration by the incorporation of BT. In terms of the electrical properties, the significant decline in Curie temperature , improvement in permittivity, and reduction in high-temperature dielectric loss can be observed with the increase of BT content. The increased remnant polarization, enhanced dielectric response and decreased coercive field were helpful for the piezoelectric performance. The maximum room-temperature piezoelectric coefficient of ∼160 pC/N and high-temperature piezoelectric coefficient of ∼324 pC/N were acquired in the x = 0.30 ceramics. This work provides a clear scope for further research on the structural transformation and high-temperature piezoelectric applications of BF-BT system.
研究领域:
材料科学
·
陶瓷
·
压电材料
·
晶体学
·
电学性质
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 31
·24038-24047
·
IF 2.779
Yu Tengfei,Jiang Subin,Qiao Yi,Liu Feng,Yang Baojuan,Gao Meizhen
High-performance 0.7Bi 1.02 FeO 3 –0.3BaTiO 3 ceramics are prepared by traditional solid-state method with annealing. The effect of annealing temperature ( T A ) on the piezoelectric properties of ceramics are revealed by studying the crystal structures, ferroelectric properties, and electrical properties of the as-sintered ceramic and ceramics annealed at 600, 700, 800, and 900 °C. Through the analysis, we found that T A has little influence on the morphology and crystal structure of ceramics, all ceramics are two-phase ( R-PC ) coexistence structures. But T A relates to the concentration of charge defects. When annealing at 800 °C, the charge defects in the ceramic are the least. Therefore the best performance ( d 33 = 202 \(\pm\) 3 pC/N, T C = 496 °C) ceramic is obtained. Our experiments demonstrate that the charge defects induced by annealing temperature are very important to the piezoelectricity of BFO–BTO ceramics.
研究领域:
材料科学
·
电陶瓷
·
固体物理
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-12
·
IF 2.8
Xie Le-Tian,Zhou Xiao-Xiao,Tang Yu-Cheng,Yin Yang,Hao Yijin,Pei Jun,Zhang Bo-Ping
With the increasing demand for portable electronics, power electronics and other devices, energy storage materials with high power density and large energy storage density are becoming more and more important. BiFeO 3 -BaTiO 3 lead-free ferroelectric ceramics are deemed as a potential lead-free energy storage material due to their high spontaneous polarization and high Curie temperature. However, high remanent polarization has become a serious obstacle to its practical application. In this work, 0.67Bi (1- x ) Sm x FeO 3 -0.33BaTiO 3 (BS x F-BT, 0 ≤ x ≤ 0.10) was prepared by the conventional solid phase sintering method. The phase transforms from rhombohedral to pseudocubic, and the dielectric and electrical data reveal that relaxor ferroelectrics are favorable for achieving the small size polar nanoregions and enhanced relaxation behavior. Due to enhanced relaxation behavior by doping Sm 3+ , the recoverable energy storage density ( W rec ) reaches 1.99 J/cm 3 , and the energy storage efficiency ( η ) is 57% at a low electric field (190 kV/cm), which is higher than the undoped ceramic ( W rec = 0.272 J/cm 3 and η = 26%). This work also puts forward the concept of Ergodic relaxor ferroelectrics and Non-ergodic relaxor ferroelectrics to explain the improvement of energy storage performance.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jiyuan Chen,Feng Luo,Yuanshui Liu,Denghui Jiang,Linzhuang Xing,Zhimin Li
The lead-free BiFeO 3 -BaTiO 3 (BF-BT) based ceramics with large piezoelectric coefficient ( d 33 ) have been desired for promising applications in high-temperature fields. Herein, the 0.7Bi(Fe 0.9985 Mn 0.0015 )O 3 -0.3BaTiO 3 ceramics with different grain sizes are intentionally prepared by solid-state method, and a large d 33 (232 pC/N) and high Curie temperature T c (501 °C) are simultaneously achieved in the case of large grain size (>9 µm). X-ray diffraction and Rietveld refinement analyses indicate that these coarse-grained samples possess stronger rhombohedral distortion and enlarged lattice parameter compared to fine-grained samples, which make domain switching easier and give rise to the increase in strain. As a result, the piezoelectric and ferroelectric properties of such samples are significantly improved with increasing grain size from 3.05 µm to 9.07 µm. In addition, electric domain configuration and field-induced strain further prove that the strong piezoelectric response in coarse-grained samples is attributed mainly to enhanced non-180° domain mobility. This study reveals the origin of large piezoelectric response in coarse-grained BF-BT ceramics, and proposes an effective approach to improve the piezoelectric properties of BF-BT ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Minghai Yao,Bo Li,Hanxiao Gao,Gengguang Luo,Lulu Liu,Hangyao Wu,Ze Yuan,Jiahong Li,Shenglin Jiang,Guangzu Zhang,Haibo Zhang,Yang Liu
Piezoelectric actuators, enabling the conversion of electrical energy into mechanical strain, are pivotal in various electromechanical applications. The morphotropic phase boundary (MPB) approach has been widely used to enhance the electrostrain performance of piezoelectrics. It remains to be explored alternative frameworks beyond the conventional MPB method. Here, a high-entropy strategy is used to enhance the electromechanical response of ferroelectric materials with pristine composition near MPB. By incorporating chemical disorders through the high-entropy strategy, atomic disordered arrangements and severe lattice distortions are induced in the BiFeO3–BaTiO3 (BF-BT) system, thus promoting the formation of nanopolar regions and nanodomain structures, facilitating a more flattened energy profile and mutual phase transformation under an electric field and improving the electromechanical response activity of lattices. As a result, high-entropy BF-BT-based polycrystalline ceramics exhibit an ultrahigh electromechanical response with a giant unipolar electrostrain of 1.23% at 80 kV cm–1 with fatigue-free resistance to cyclic electric fields. The effective converse piezoelectric coefficient (d33*) reaches 1537 pm V–1, surpassing most lead-free piezoelectrics. Our work highlights the potential of high-entropy design in ferroelectric materials as high-performance piezoelectric actuators.
研究领域:
材料科学
·
铁电材料
·
压电材料
·
陶瓷工程
·
功能材料
✓ 已验证
产品关联
DOI
PubMed
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
·
固体力学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kai Liu,Rongxia Huang,Dijia Lin,Junhui Tan,Yejing Dai,Hua-Tay Lin
BiFeO 3 -BaTiO 3 ceramics exhibit excellent thermal stability and outstanding electrical properties in the morphotropic phase boundary (MPB) region, making them a prominent focus of research of lead-free piezoelectric ceramics. However, the conventional sintering process often results in Bi volatilization and changes in the valence state of Fe ions, leading to high leakage current and difficulty in achieving a piezoelectric coefficient above 200 pC/N. In this study, we fabricated 0.7BiFeO 3 -0.3BaTiO 3 -0.1 mol% MnCO 3 - x wt% Sc 2 O 3 (BFM-BT- x Sc) piezoelectric ceramics using a direct reaction sintering method. We investigated the microstructure, electrical properties, and thermal stability of the BFM-BT- x Sc ceramics. Compared to single Mn 2+ doping, the addition of Sc 3+ significantly refined the grain size, suppressed the transition of Fe 3+ to Fe 2+ , and reduced the concentration of oxygen vacancies, resulting in enhanced electrical properties of BFM-BT ceramics. The BFM-BT-0.2Sc ceramics exhibited excellent piezoelectric performance ( d 33 = 208 pC/N, d 33 = 400 pC/N at 308 °C) and a high Curie temperature ( T c = 502 °C), with a resistivity of 1.69 × 10 8 Ω cm at 200 °C. After optimizing the sintering temperature, the piezoelectric performance further improved, with d 33 reaching 228 pC/N, d 33 = 427 pC/N at 282 °C, and a resistivity of 5.9 × 10 8 Ω cm at 200 °C. These findings indicate that BFM-BT-0.2Sc ceramics possess excellent high-temperature electrical properties, suggesting broad prospects for the co-doping of Mn 2+ and Sc 3+ in BF-BT-based piezoelectric ceramics for high-temperature applications.
研究领域:
材料科学
·
无机非金属材料
·
电子材料
✓ 已验证
DOI
高影响因子
Journal of Science-Advanced Materials and Devices
·
2026
·Vol. 11
·期 3
·101207
·
IF 6.9
Lu Yang,Junjie Li,Jianzi Xu,Kun Zhang,Chunxin Ma,Wenjuan Wu,Xing Zhang
Lead-free piezoelectric ceramics with high Curie temperature are urgently demanded to replace toxic lead-based materials for environmental sustainability, among which BiFeO 3 –BaTiO 3 (BF-BT) systems show promising potential. Although chemical substitution is widely adopted to modulate properties, achieving balanced electromechanical performance in BF-BT ceramic remains challenging due to the complexity of A-site cations (Bi 3+ and Ba 2+ ) with different valence states and ionic radii. Herein, we systematically investigated site-selective Sm 3+ substitution effects on structure and properties of BF-BT ceramics. Bi-site substitution promoted grain growth and reduced leakage current via suppressed bismuth volatilization, while Ba-site substitution refined grains but severely disrupted ferroelectric ordering due to charge imbalance. Furthermore, 2/3Bi 0.995 Sm 0.005 FeO 3 -1/3BaTiO 3 (BF-BT-Bi-Sm0.005) achieved optimized comprehensive performance, exhibiting a piezoelectric coefficient of d 33 = 87 pC/N, mechanical quality factor of Q m = 101.5, Curie temperature of T m = 394 °C, and low leakage current density. These results demonstrate that low-level Bi-site substitution effectively coordinates defect chemistry, microstructure, and domain engineering to achieve superior electromechanical coupling, providing a rational design strategy for high-performance lead-free ceramics suitable for high-temperature sensing applications.
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DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2021
·Vol. 130
·期 14
·
IF 2.546
Peng Xiao-Yan,Tang Yu-Cheng,Zhang Bo-Ping,Zhu Li-Feng,Xun Bo-Wei,Yu Jing-Ru
BiFeO 3 -BaTiO 3 is a promising high-temperature lead-free piezo-ceramics due to its high Curie temperature ( T C > 500 °C) and excellent piezoelectric properties. However, a high leakage current was often detected in this system, which severely affects its applications. In this work, the 0.7BiFe (1− x ) Ga x O 3 -0.3BaTiO 3 (BFGa x -BT, 0.00 ≤ x ≤ 0.10) system was designed to reveal the reason of leakage-current density decreased by their leakage mechanism. Because of the suppression of generation of Fe 2+ and oxygen vacancy ( V O ∙ ∙ ), the leakage mechanism from space charge limited conduction mechanism found in Ga-free BF-BT ceramics turns into Ohmic conduction and Schottky emission mechanism as Fe 3+ was replaced with Ga 3+ . A good combination of piezoelectric properties ( d 33 = 174 pC N −1 and k p = 29%) and high Curie temperature ( T C = 497 °C) was achieved in the BFGa0.06-BT ceramic owning the lowest leakage-current density. This work will provide the clues for preparing the high insulation and high piezoelectric performance BF-BT-based ceramics by suppressing the valence change of Fe 3+ and V O ∙ ∙ appearance.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Che Sun,Wenming Shi,Junjun Wang,Yingchun Liu,Danqing Liu,Fengmin Wu,Hongjun Zhang
BiFeO 3 -BaTiO 3 (BF-BT)-based ceramics with large piezoelectric coefficient are potential high-performance lead-free piezoelectric compounds. In this work, BF-BT based textured ceramics were constructed through the addition of 5 vol% (001) c oriented BT templates to the 70BF-30BT matrix. The high texture degree ( F ∼96 %) and relatively enhanced piezoelectric coefficient ( d 33 = 210 pC/N) were achieved in comparison with random BF-BT ceramics. EBSD were conducted to demonstrate the feasibility of texture engineering in BF-BT-based ceramics. Unlike the tradeoff between weakened Curie temperature ( T c ) and enhanced d 33 values via the doping strategy, T c in textured BF-BT ceramics showed no significant change ( T c = 510 °C). Meanwhile, textured BF-BT ceramics had a lower coercive electric field E c = 25 kV/cm but higher spontaneous polarization P s = 55 µC/cm² and remanent polarization P r = 54 µC/cm². Such enhanced piezoelectric properties of textured ceramics were mainly attributed to the combination of piezoelectric anisotropy along the [00 l ] direction and the 4 R engineering domain configuration. This work may provide a viable direction for the realization of high-temperature piezoelectric devices.
研究领域:
材料科学
·
无机非金属材料
·
功能陶瓷
·
压电材料
·
固态物理
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Renjun Xu,Yingzhi Meng,Yongbao Cui,Biao Zhang,Bangxian Xie,Hongle Fan,Xiangdong Ding,Changbai Long,Laijun Liu
BiFeO 3 -BaTiO 3 system is considered a promising lead-free candidate for piezoelectric actuators, sensors, and energy-harvesting devices due to its good piezoelectric properties and high Curie temperature. However, achieving synergistic optimization of piezoelectric performance and thermal stability has remained a persistent challenge. Here, we propose a multiscale modulation strategy by precisely controlling Bi excess ( x ) and designing quenching pathways in 0.7Bi (1+ x ) Fe 0.99 Nb 0.01 O 3 -0.3BaTiO 3 ceramics. The results demonstrate that water quenching for sintering in O 2 (O 2 WQ) effectively increases c /a ratio of tetragonal phase and modulates domain configuration and suppressing the concentration of point defects. Bi excess-induced octahedral distortion and valence state modulation of Fe promote the switching of ferroelectric domains. Both enhance piezoelectricity and temperature stability. Remarkably, the x = 0.01 composition with O 2 WQ treatment achieves optimal performance: a room-temperature piezoelectric coefficient d 33 = 236 pC/N, a high Curie temperature T C = 472 °C, an excellent thermal stability across 60-270 °C ( d 33 = 314 ± 47 pC/N), as well as high DC resistivity ρ > 10 6 Ohm·cm at 270 °C. This performance surpasses most reported lead-free piezoelectric systems and confirms the efficacy of our multiscale modulation strategy. This work provides a viable design paradigm for high-performance lead-free piezoelectric ceramics suitable for high-temperature and high-power applications.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Jinxing Yu,Ri Han,Shu Jin,Xiaoxiang Xu
BiFeO 3 is a narrow-bandgap semiconductor promising for solar water splitting but is generally subject to a low photocatalytic activity due to the poor separation of photocarriers (e − and h + ). In this work, BiFeO 3 has been combined with BaTiO 3 to form the solid solutions (i.e. (BiFeO 3 ) 1-x (BaTiO 3 ) x (0 ≤ x ≤ 1)) which demonstrate a much-improved activity for photocatalytic H 2 production under visible light illumination. The solid solution strategy not only tunes the bandgap but also modifies the dielectric constant that is critical for a high photocatalytic activity. A high dielectric constant contributes to an improved photocarrier separation condition due to the screening of the Coulomb interactions between photocarriers and between photocarriers and charged defects. This work reveals a useful solid solution strategy to modify the photocatalytic performance and justifies the importance of dielectric properties for photocarrier separation.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）