CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Yang Li,Ling Zhang,Linjiang Yu,Dequan Li,Haoyan Meng,Qiao Ai,Jinzhu Hu,Li Jin,Jinghui Gao,Gang Liu
Barium titanate ceramic is frequently used as a ferroelectric material and can be applied in the pulse power field in energy storage devices. Its properties, including dielectric , ferroelectric, and energy storage properties, can be significantly improved through doping. In this work, we prepared a series of (1- x )Ba 0.65 Sr 0.245 Bi 0.07 TiO 3 - x ZnO ( x = 0.005, 0.01, 0.02, 0.03) lead-free bulk relaxor ferroelectric ceramics by a traditional die-pressing processing route. The uniformity of the grain sizes for these ceramics was improved, and the grains were refined when a certain amount of ZnO was introduced into BaTiO 3 -based ceramics. In addition, the breakdown strength was improved in the case where the relaxor behavior was not significantly improved. It should be noted that the sample doped with 0.02 mol Zn showed the maximum room-temperature storage density (1.51 J/cm 3 ) at the largest electric field strength (210 kV/cm). At the same time, this ceramic exhibited good stability to temperature (60–150 °C) and frequency (10–100 Hz) variations, as well as fantastic fatigue resistance (10,000 charge-discharge cycles). This paper presents in-depth studies of the structure, morphology, electrical properties, and energy storage performance of ZnO-modified BaTiO 3 -based ceramics.
研究领域:
材料科学
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电气工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Silin Tang,Yingzhi Meng,Yongqing Cai,Biaolin Peng,Laijun Liu,Qingqing Ke
Ferroelectric electrocaloric (EC) materials are a pivotal part of sustainable micro-cooling, which complements conventional cooling methods in miniaturized devices. However, the application of EC materials is largely limited by the unsatisfactory room-temperature EC response and narrow operation temperature window. In this work, with careful tuning the composition of BaTiO 3 (BT)-based ceramics through the conventional doping method, enhanced EC properties were achieved in Ba 0.8 Sr 0.2 Zr x (Ti 0.999 Mn 0.001 ) 1- x O 3 (BSZMT) ( x = 0.05, 0.10, 0.15, and 0.20). We especially found that the electrocaloric temperature change ( ΔT ) of > 0.50 K was achieved in a broaden temperature ranging from 20 °C to 95 °C and a peak ΔT value of 1.08 K was achieved at temperature of 70 °C in our BSZMT with x = 0.15. To ascertain the physical mechanism, we employed hybrid characterization methods including XRD , Raman, and dielectric analysis together with Density Functional Theory (DFT) calculation. Our results clearly show that the doped Zr and Mn at B site of BSZMT effectively modulate the microstructure leading to coexistence of different ferroelectric phases and broken long-range ferroelectric order, which subsequently results in the enhanced EC performance and broad operating temperature window.
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 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
✓ 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
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无机非金属材料
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功能陶瓷
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压电材料
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固态物理
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 25
·11839-11851
·
IF 4.682
Wang Hongye,Huang Rui,Hao Hua,Yao Zhonghua,Liu Hanxing,Cao Minghe
Dielectric capacitors are extensively applied in the electronics industry and energy storage fields due to their fast charging and discharging and better safety and stability. However, the inferior dielectric stability and low energy storage density observably limited the applications in electronics industry. A reasonable microstructural design of hierarchically structured ceramics by synergistic multiscale-domain is applied to the preparation of dielectric ceramics capacitors to improve the dielectric and energy storage properties. The dielectric and energy storage performance of materials could be adjusted and controlled by coordinating the single domain and multi domain structures of nanograins and macro grains. BaTiO 3 -based dielectric ceramics are prepared by fabricating around macrocrystalline BaTiO 3 with nanocrystalline BaTiO 3 . The synergistic effect for the various grain sizes of BaTiO 3 can significantly enhance the breakdown strength and polarization and achieve excellent dielectric properties. The results show that predominant dielectric temperature stability in compliance with the X9R standard is obtained. Synchronously, a large discharge energy storage density of 2.18 J cm −3 and an excellent energy storage efficiency of 77% together with prominent storage cycle stability (under 10 5 times) and extraordinary temperature stability (30–200 °C) is achieved in this hierarchical structure design for BaTiO 3 @FeO ceramics. The microstructure design by fabricated hierarchically structured materials provides a feasible illustration for developing dielectric capacitors with high-performance dielectric and energy storage capabilities. Graphical abstract
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Wentao Huai,Xinyu Fu,Yifan Zhao,Zhenhao Cai,Saiwei Luan,Zhouyi Xu,Huizhan He,Jingxi Wang,Zhenxiao Fu,Xiuhua Cao,Lei Zhang,Rong Sun
Multilayer ceramic capacitors (MLCCs) are used in harsh environments such as automotive electronics, which require high reliability and temperature stability. Therefore, the regulation of Ho/Mg co-doping on the core-shell structure of BaTiO 3 -based MLCCs and the effect on temperature stability and reliability were investigated in this study. Ceramics and MLCCs device with various Ho/Mg molar ratios (1.2–1.8) were prepared using the solid-state reaction method. The study revealed the synergistic effects of Ho/Mg doping on shell concentration, shell thickness, and oxygen vacancy inhibition. The results showed that with the Ho/Mg molar ratio increase, the shell thickness increased from 27.98% to 62.24%. The temperature coefficient of capacitance (TCC) for the sample with Ho/Mg=1.8 satisfied the EIA-X7S (ΔC/C 25°C = ±22%, –55 °C to 125 °C) specification. X-ray photoelectron spectroscopy confirmed that Ho 3+ effectively captured oxygen vacancies by forming defect dipoles, while impedance spectroscopy demonstrated that the shell significantly inhibited carrier migration. Furthermore, the MLCCs device with Ho/Mg=1.8 exhibited a breakdown strength of 96.38 kV/mm and met the more stringent EIA-X7R (ΔC/C 25°C = ±15%, –55 °C to 125 °C) specification. These findings indicate that Ho/Mg co-doping effectively optimizes the core-shell structure, offering valuable theoretical guidance for developing MLCCs with enhanced temperature stability and reliability.
研究领域:
电子材料
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功能陶瓷
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介电物理
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材料科学
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无机非金属材料
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器件可靠性
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固态化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）