CERAMICS INTERNATIONAL
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2024
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IF 5.1
Peng Wang,Shiqi Zhong,Ying Wang,Liyao Zou,Fangyuan Yu,Cong Lin,Mei Lin,Min Gao,Chunlin Zhao,Xiao Wu,Chao Chen
The pursuit of high-performance piezo-photocatalysts through structural modifications has been a focal point of investigation within the realm of related scientific disciplines. In this study, we successfully designed Er-doped Bi 0.5 Na 0.5 TiO 3 –BaTiO 3 combined with rare earth ion doping and solid solution modification, and the prepared particles exhibited homogeneous grain sizes and optimized concentrations of oxygen vacancies ( O V ). The synergistic incorporation of O V (accelerator for catalytic reaction) and Er 3+ results in an impressive 12-fold enhancement of the piezo-photocatalytic rate when degrading the Rhodamine B dye. The optimal composition 0.96BNT-0.04BT-Er demonstrates outstanding electrochemical properties , including a superior photocurrent response and minimal impedance, highlighting its exceptional performance in piezo-photocatalysis. The fundamental enhancement in catalytic performance can be attributed to the reconfiguration of the band structure of 0.96BNT-0.04BT-Er, which has been meticulously calculated utilizing DRS and VB-XPS and the internal mechanism was explained in detail. This research serves as a source of inspiration for the investigation of solid solutions among piezo-photocatalysts and sheds light on the vital role of band structure in governing catalytic performance.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2026
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IF 9.2
Zhiping Wang,Li-Qian Cheng,Hengtong Zhao,Yiming Yang,Jingrui Cui,Jia-Xin Liu,Xin Li,Yue Wang,Pengcheng Wang,Qingna Li
Lead-free dielectric ceramics have attracted considerable attention for use in pulsed power systems owing to their ultrafast discharge rates and exceptionally high power density. However, achieving both ultra-high recoverable energy density (Wrec > 10 J cm−3) and high energy efficiency (η > 80%) simultaneously remains a significant challenge. In this study, an entropy engineering strategy is employed to disrupt long-range ferroelectric order, thereby stabilizing ultra-small polar nanodomains characterized by diverse BO6 octahedral tilts and locally distinct polarization states. This structural modulation effectively reduces the transition barrier, inducing a superparaelectric-relaxor behavior. Moreover, it enables a high polarization response, low remanent polarization (Pr), delayed polarization saturation, and a substantially enhanced breakdown electric field (Eb). As a result, an outstanding Wrec of 12.2 J cm−3 and a high η of 81% are achieved under an Eb of up to 980 kV cm−1. The material also exhibits excellent discharge performance, along with robust thermal and frequency stability. This work not only presents a promising candidate material for high-power pulse capacitors but also provides valuable insights for enhancing energy storage performance in BNT-based and related lead-free dielectric ceramics.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mingge Zhu,Xiaopei Zhu,Mengdi Zhang,Hangjian Wang,Wenjing Qiao,Yangfei Gao,Ruirui Kang,Mei Bai,Junwen Mei,Na Tian,Caiyin You,Xiaojie Lou
Lead-free ferroelectric ceramics show promising applications in environmentally friendly optoelectronic devices, yet conventional Bi 0.5 Na 0.5 TiO 3 -based materials face challenges in achieving balanced enhancement of energy storage density and photoluminescence properties. In this study, the influence mechanism of the structural evolution of Bi 0.5 Na 0.5 TiO 3 -based ceramics on their energy storage and photoluminescence properties was systematically studied. It was found that the doping of BaTiO 3 and SrTiO 3 caused local structural distortion and oxygen octahedral tilt, and the introduction of larger radius ions in A-site significantly refined grain size and improved breakdown electric field, endowing 0.75Bi (703/1500) Dy (47/1500) Na 0.5 TiO 3 -0.25BaTiO 3 with a high recoverable energy density of 3.73 J/cm 3 and an outstanding efficiency of 85.62 % under 350 kV/cm, while 0.75Bi (703/1500) Dy (47/1500) Na 0.5 TiO 3 -0.25SrTiO 3 exhibited strong photoluminescence properties, suggesting its potential as a yellow-green phosphor for warm white LEDs. Besides, SrTiO 3 doping enhanced crystal field symmetry to suppress thermal quenching via reduced phonon coupling, simultaneously improving Dy 3+ 6 H 15/2 → 4 I 13/2 transitions through optimized parity-forbidden relaxation. These findings elucidate the pivotal role of structural engineering strategies in tailoring the energy storage and photoluminescence properties of Bi 0.5 Na 0.5 TiO 3 ceramics, thereby will be beneficial for advancing the development of high-performance multifunctional dielectric capacitors.
研究领域:
材料科学
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铁电性
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光电子学
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固体物理学
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陶瓷工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xinyu Chen,Xinyu liu,Taotao Ai,Qian Qiu,Minghui Hao,Yang He,Minghui He,Haoyu Wang,Chunlin Song,Daniel Q. Tan,Gang Liu,Yan Yan
Herein, a series of lead-free ceramics, (1− x )(0.78Bi 0.5 Na 0.5 TiO 3 –0.22SrTiO 3 )– x Ba(Zr 0.5 Ti 0.5 )O 3 (abbreviated as BNST–BZT), were synthesized via the conventional solid-state reaction approach. The effects of introducing the BZT component on the electromechanical transformation properties and phase transition of BNST were thoroughly investigated, leading to the development of a corresponding phase diagram. The addition of BZT significantly influenced phase transitions and domain structures, with phase coexistence involving ferroelectric rhombohedral and relaxor tetragonal phases. XRD analysis and temperature-dependent measurements of dielectric and ferroelectric properties demonstrated that the relaxor phase content could be modulated by adjusting the BZT content and varying the temperature. Domain changes were also observed through PFM testing. With the addition of BZT, the RE-FE phase transition temperature T F-R is successfully adjusted to near room temperature, accompanied by the disruption of long-range ferroelectric domains and the formation of polar nanoregions. This transition marks a shift from NR to ER state. Specifically, with an optimized BZT content of 0.006, the material demonstrates a significant strain of 0.41 % under a 70 kV/cm and achieves a maximum normalized strain of 715 p.m./V at 50 kV/cm. This research introduces an effective doping strategy that offers valuable insights into the design and development of high-performance lead-free ceramics. Additionally, it investigates the mechanisms underlying the observed high strain responses, highlighting their potential application in lead-free piezoelectric actuators.
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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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 28
·56185-56193
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IF 5.6
Jinxin Fu,Changrong Zhou,Jun Chen,Huihui Liu,Hao Yang,Qingning Li,Changlai Yuan,Jiwen Xu,Guanghui Rao
The incomplete preferred orientation polarization and partially back-switching reoriented domains during/after poling with electrical loading and unloading were ubiquitous and suppressed both piezoelectric constant ( d 33 ) and depolarization temperature ( T d ) of piezoelectric ceramics. In this work, a simple poling strategy with multi-cycles of AC electric field is proposed to realize polarization wake-up in unmodified 0.92Bi 0.5 Na 0.5 TiO 3 -0.08BaTiO 3 (BNT-8BT) with significantly enhanced d 33 from 65 pC/N to 161 pC/N and high T d of 200 °C simultaneously. Through comprehensive analysis on the polarization wake-up and polarization switching process, it is demonstrated that remarkably improved d 33 originates from AC cycles poling induced coexistence of P 4 bm and P 4 mm phases, depinned domains and defect dipoles orientation polarization. The internal bias field (E i ) resulted from defect dipoles orientation aids the d 33 and its high temperature stability. Our work provides a convenient and inexpensive method that there need not commonly delicate compositions control in lead-free piezoceramics on advancing to alleviate the trade-off between d 33 and T d .
研究领域:
材料科学
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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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无铅压电体
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产品关联
DOI
高影响因子
Journal of Energy Storage
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2024
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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
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Shuo Zhang,Hua Hao,Rui Huang,Minghe Cao,Zhonghua Yao,Hanxing Liu
Dielectric capacitors are indispensable for high-power energy storage systems due to their rapid charge–discharge capabilities, environmental sustainability, and exceptional power density. As a prototypical lead-free relaxor ferroelectric material, bismuth sodium titanate (Bi0.5Na0.5TiO3, NBT) is considered a promising candidate for dielectric capacitors owing to its large polarization. However, the inherent contradiction between high polarization and high breakdown strength (Eb) limits the energy storage performance of NBT-based film capacitors, severely restricting their application in high-pulsed-power systems. In this work, a synergistic strategy is proposed to optimize the polarization performance and achieve outstanding energy storage capabilities. From the introduction of Bi(Mg0.5Zr0.5)O3 (BMZ) into NBT-based films, a structural transition is realized from large-scale ferroelectric domains to small-sized, highly dynamic polar nanoregions (PNRs), accompanied by significant grain densification and reduced grain size. Consequently, this approach effectively reduces remnant polarization (Pr) and minimizes the leakage current. In the optimized 0.7NBT–0.3BMZ films, simultaneous enhancements in polarization behavior and Eb are achieved, yielding an ultrahigh Wrec of 74.0 J cm–3 and maximum polarization (Pmax) of 110 μC cm–2 at a high Eb of 2273 kV cm–1. Furthermore, the excellent temperature stability (20–200 °C), frequency stability (50–5000 Hz), and cycling stability (1–105 cycles) with the variation of Wrec < ±4% and efficiency (η) < ±3% are also achieved in the 0.7NBT–0.3BMZ films. This work achieves simultaneous enhancement of polarization and Eb in lead-free film capacitors, offering a breakthrough strategy to advance dielectric energy storage devices with superior performance.
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Pu Mao,Yongguang Guo,Ting Wang,Liqiang He,Wanjin Li,Zhiyong Liu,Bing Xie,Kun Guo,Longlong Shu,Jinghui Gao
High-performance dielectric capacitors featuring large recoverable energy storage density (Wrec) and high discharge efficiency (η) are beneficial to realize the device miniaturization, lightweight property, and sustainability of advanced pulse power systems. The obtainment of a high electric breakdown strength (Eb) is crucial for improving the energy storage performance of dielectric materials. However, as for Bi0.5Na0.5TiO3 (BNT) lead-free relaxor ferroelectric ceramics, the relatively lower Eb directly limits their electrical performance improvement and practical applications. Herein, a popular high entropy strategy was employed to rationally design and prepare the (Bi0.5Na0.5)x(Sr0.25Ba0.25La0.25K0.25)(1–x)TiO3 (BNSLBKT-x) lead-free relaxor ferroelectric ceramics based on the BNT matrix. Encouragingly, the BNSLBKT-0.2 high-entropy ceramic exhibits a high Eb of 510 kV/cm, and this can be ascribed to the refined grains and enhanced activation energy. Moreover, it is confirmed that the polar nanoregions (PNRs) exist in the BNSLBKT-0.2 ceramic by the piezoresponse force microscopy (PFM) and transmission electron microscopy (TEM) characteristics, further strengthening relaxation behaviors and decreasing remanent polarization (Pr). It is anticipated that a high Wrec of 4.6 J/cm3 and a good η of 86% are obtained in this BNSLBKT-0.2 high-entropy ceramic. More importantly, the BNSLBKT-0.2 ceramic displays excellent frequency stability of capacitive energy storage at 10–1000 Hz and good temperature stability at 20–140 °C. The fast discharge rate (τ0.9 = 0.26 μs) and the high PD of 49.2 MW/cm are also achieved in this BNSLBKT-0.2 ceramic. The findings demonstrate that this high entropy design is an effective strategy for developing dielectrics with excellent energy storage capability to meet the requirements of modern dielectric capacitor applications.
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
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Gang Chen,Xue Bai,Cong Ji,Zhijun Zhou,Zixuan Zhang,Chao Chen,Zhengtang Su,Wei Cai,Rongli Gao,Chunlin Fu
Bi 0.5 Na 0.5 TiO 3 ceramic is a promising dielectric energy storage material due to its high spontaneous polarization (> 40 μC/cm 2 ) . Although many studies have been carried out to enhance the energy storage performance of Bi 0.5 Na 0.5 TiO 3 ceramic, achieving better energy storage performance is still a considerable challenge. Herein, Bi 0.5 Na 0.5 TiO 3 -BiYbO 3 -SrTiO 3 (BNT-BY-STO) relaxor ferroelectric ceramics were constructed, and <111>-oriented (1- x )(0.99BNT-0.01BY)- x STO ceramics were successfully fabricated by a templated grain growth method. The moderate energy storage performance (the reversible energy storage density of 3.26 J/cm 3 and energy storage efficiency of 76.3% under 290 kV/cm) can be achieved in <111>-oriented 0.8(0.99BNT-0.01BY)-0.2STO ceramics. The enhanced energy storage performance of textured BNT-BY-STO ceramics could be mainly attributed to the grain refinement of STO, and the improved breakdown strength and relaxation behavior caused by orientation engineering. These findings demonstrate that the co-doping of BY and STO and orientation engineering are effective strategies for improving the energy storage performance of BNT ceramic.
研究领域:
材料科学
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电陶瓷
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储能材料
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DOI
高影响因子
危险品化学品经营许可证（带存储）