CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 23
·40067-40078
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IF 5.6
Meng Wang,Ting Wang
BiFeO 3 -BaTiO 3 exhibits a high dielectric constant , excellent ferroelectric properties, and mechanical stability , making it a promising material for energy storage applications . However, unmodified BiFeO 3 -BaTiO 3 ceramics typically exhibit high residual polarization and low breakdown strength , resulting in low energy storage density and efficiency. In this study, (1- x )(0.67BiFeO 3 -0.33BaTiO 3 )- x (Sr 0.7 Nd 0.2 )TiO 3 ceramics were prepared and demonstrated a pseudo-cubic perovskite structure at room temperature. As the x value increased, the long-range ordered ferroelectric structure was disrupted, the relaxation characteristics were enhanced, and the grain size decreased significantly. The maximum polarization strength (P max ) of the composition with x = 0.15 reached 38.57 μC/cm 2 at 180 kV/cm. Under low electric fields, this material achieved an excellent recoverable energy storage density (W rec ) of 2.57 J/cm 3 and a high energy storage efficiency (η) of 79 %, while also exhibiting good frequency stability and charge/discharge performance. These characteristics suggest its potential application as a next-generation electrostatic capacitor material.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 6
·4232-4241
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IF 3.5
Xiaoxin Chen,Hailan Qin,Hongtian Li,Yuxiao Du,Shenghao Wang,Peifeng Li,Yongming Hu,Laijun Liu,Jianwei Zhao,Dawei Wang
In many studies, the properties of BiFeO 3 –BaTiO 3 (BF–BT) ceramics vary greatly using different raw reagents, which makes it challenging to obtain reliable and repeatable properties of BF–BT-based devices. In this work, 0.7BiFeO 3 –0.3BaTiO 3 (0.7BF–0.3BT) ceramics were fabricated by a conventional solid-phase synthesis using TiO 2 reagents with varied purities of 98%, 99%, 99.9%, and 99.99%, respectively. The phase structure, microstructure, ferroelectric, and piezoelectric properties were comprehensively studied. All compositions of the ceramics exhibit a pseudo-cubic phase perovskite structure, and the fraction of the rhombohedral phase increases with increasing the TiO 2 purity. Additionally, backscattered electron images and energy-dispersive spectroscopy revealed an obvious core–shell structure within grains. In particular, the 0.7BF–0.3BT ceramics prepared with 98% purity TiO 2 exhibited superior ferroelectric and piezoelectric properties, d 33 ∼ 220 pC/N and d 33 ∗ $d_{{\mathrm{33}}}^{\;*}$ ∼ 230 pm/V. The ceramics prepared with higher purity TiO 2 suffered from severe leakage conduction, which can be well addressed by adding excess TiO 2 . Our work reveals the importance of different grades of purity TiO 2 on the electrical properties of BF–BT ceramics.
研究领域:
材料科学
·
物理学
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Huiting Zhang,Anze Shui,Chaoyu Peng,Hulei Yu,Xinrong Zhong
Lead-free dielectric ceramic capacitors are promising for pulsed-power applications owing to their high power density and rapid charge-discharge capability. However, simultaneously achieving high recoverable energy density ( W rec ) and efficiency ( η ) under moderate electric fields remains challenging. Here, we develop (Na 0.7 La 0.1 )TaO 3 (NLT)-doped 0.67BiFeO 3 -0.33BaTiO 3 (BFBT) ceramics with exceptional energy storage properties through the synergy between relaxor regulation and 0-3 perovskite–pyrochlore composite design. The introduction of NLT is demonstrated to effectively disrupt the long-range ferroelectric order of BFBT and promote the formation of highly dynamic polar nanoregions, significantly minimizing their remanent polarization. When the NLT content exceeds the solid-solution limit, the Bi 2 Ti 2 O 7 pyrochlore secondary phase forms and establishes insulating interfaces that suppress long-range carrier migration and enhance the breakdown strength. Owing to these synergistic effects, the optimized ceramics with the addition of 15% NLT exhibit a large W rec of 3.81 J/cm 3 and a high η of 91% at 330 kV/cm, as well as excellent frequency, thermal, and cycling stability. The synergistic relaxor-regulation and grain-boundary-insulation strategy provides a feasible route for high-performance lead-free ceramic capacitors.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Min Zhang,Zihao Zheng,Fengyuan Dong,Jinming Guo,Bin Yang,Peixuan Jing,Yang Li,Ce-Wen Nan,Yuan-Hua Lin
Multilayer ceramic capacitors (MLCCs) with ultrahigh power density are fundamental components in the modern electronics industry. However, the relatively low energy density or/and efficiency are still limited by high conduction losses and hysteresis loss. To address these issues, we propose a simple and efficient design in high-entropy 1/3BiFeO 3 -1/3BaTiO 3 -1/3Ca 0.5 Sr 0.5 TiO 3 ceramics (abbreviated as BFBCST) through three different sintering aids (CuO, MgO, MnO 2 ). With optimized sintering aids, the optimal sintering temperature is reduced by 150 to 975°C. Meanwhile, the synergistic strategy effectively minimizes hysteresis loss by lowering the domain switching barriers and decreases conduction losses by suppressing the volatilization of Bi 3+ and minimizing valence variations of Fe 3+ and Ti 4+ . Therefore, an ultrahigh energy storage density of 17.9 J cm −3 with a high efficiency of 94.4% is simultaneously achieved under an electric field of 905 kV cm −1 in BFBCST-based MLCCs with MnO 2 sintering aid. This approach should be universally applicable to designing high-performance dielectrics, which holds promise for extensive applications in MLCCs.
研究领域:
材料科学
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电子器件
·
陶瓷与介电材料
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储能技术
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Keyang Shang,Yongbo Fan,Yuxin Jia,Xinghong Chen,Zhenhai Yang,Huiqing Fan,Weijia Wang
The poor electrical properties and high leakage current of BiFeO 3 -BaTiO 3 -based ceramics are the main reasons that hinder their application. A two-step sintering method prepared the 0.68Bi 1-x La x (Fe 99.8% Sb 0.2 % )O 3 -0.32BaTiO 3 ceramics (x = 0, 0.005, 0.01, 0.015, abbreviated as BL x FS-BT). The surface morphology and properties of the ceramic were observed and tested using different techniques. La ion doping significantly affects the crystal structure, leakage current, and the electro-induced strain of the BL x FS-BT ceramics. BL 0.005 FS-BT ceramics achieve 0.198 % unipolar electro-induced strain and 396 pm/V inverse piezoelectric coefficient under a 50 kV/cm electric field, and they can maintain good temperature stability at high temperatures. A large strain of 0.43 % was obtained at 150 °C. The inhibition effect of La ion on Fe valence and oxygen vacancy formation also greatly improves the insulation performance of ceramics. This work shows that BF-BT-based ceramics via ion substitution defect engineering effectively enhance electrical and insulating properties.
研究领域:
材料科学
·
电物理学
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Shuangjie Xu,Huan Zheng,Chongqi Wang,Kaifeng Li,Xinyue Xu,Hongmeng Zhang,Yanda Ji,Lei Qiu,Hao Yang
Real-time impact monitoring is essential to ensure the safe service and efficient operation of the aircraft structure. By embedding the piezoelectric sensor array within the structure and applying appropriate signal processing algorithms, the impact position can be precisely localized, enabling real-time monitoring of the aircraft structure. With the development of supersonic aircraft, the fuselage skin of the aircraft is often exposed to high temperatures and other harsh environments during flight. However, the relatively low operating temperature significantly limits the application of traditional piezoelectric sensor arrays in high-temperature impact monitoring. The Mn-doped BiFeO 3 -BaTiO 3 ceramics exhibit excellent piezoelectric properties and high Curie temperature ( T c ), making them promising for high-temperature impact monitoring of the supersonic aircraft. In the present work, we fabricated a sensor array based on 0.7BiFeO 3 -0.3BaTiO 3 -0.25 %molMnO 2 (73BFBT-Mn) ceramic, which demonstrates a T c of 478 °C and a piezoelectric charge constant ( d 33 ) of 125 pC/N at room temperature. Significantly, the 73BFBT-Mn ceramic sensor array maintains a good impact localization accuracy from 25 °C to 200 °C combined with the improved path imaging algorithm. This is attributed to the construction of virtual paths within the sensor array and the extraction of impact signal features, which represent the major improvement compared to traditional path imaging algorithms. The 73BFBT-Mn ceramic sensor array exhibits significant prospects for high-temperature impact monitoring, particularly in the monitoring of supersonic aircraft fuselage skins.
研究领域:
材料科学
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航空工程
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传感器与执行器
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信号处理
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陶瓷工程
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高影响因子
Journal of Materiomics
·
2023
·
IF 9.4
Jianwei Zhao,Hailan Qin,Xiaoxin Chen,Shuhui Yu,Dawei Wang
A number of CaHfO 3 modified BiFeO 3 -0.33BaTiO 3 (BF-0.33BT- x CH) lead-free piezoceramics were fabricated through the solid-state sintering method and comprehensively investigated in this work. Under the optimal sintering temperature, all compositions display a typical perovskite structure in a pseudo-cubic phase with slightly larger lattice parameters as the CH content increases. The electrical resistivity is highly enhanced due to the addition of CH. Microstructures, including the grain morphology, core-shell structure, and chemistry inhomogeneities, are demonstrated upon different BF-0.33BT- x CH compositions. In particular, the core-shell structures with non-uniform element distributions in the compositions can be eliminated by adding sufficient CH content ( x > 0.05). The highest saturation polarization (40.1 μC/cm 2 ), remnant polarization (26.8 μC/cm 2 ), and converse piezoelectric coefficient (290 pm/V) are achieved in the BF-0.33BT-0.01CH piezoceramic, which are significantly enhanced in comparison with the undoped BF-0.33BT piezoceramic. With further increasing the CH content, the piezoelectric properties of BF-0.33BT- x CH ceramics decline rapidly, and they start to exhibit characteristics of relaxor ferroelectrics.
研究领域:
材料科学
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陶瓷
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压电材料
·
铁电材料
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高影响因子
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