JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 4
·1-9
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IF 2.8
Tian Tingfang,Chen Feilong,Wen Zhaokuan,Wang Zhiguo,Hu Yongming,Shu Shengwen
AgNbO 3 antiferroelectric (AFE) ceramics have attracted much attention because of their high-energy storage performance and environment-friendly characteristics. In this paper, Sb 2 O 5 -doped AgNbO 3 ceramics are prepared by the traditional solid-state reaction method, and the effects of phase structure, microstructure, dielectric, and ferroelectric properties are systematically investigated. Lattice shrinkage and obvious grain size change are caused by the introduction of Sb 5+ ions. The dielectric constant increases significantly with the introduction of Sb 5+ ( ε r from 210 to 550 at room temperature), and the phase transition temperatures of M 1 –M 2 and M 2 –M 3 shift to a lower temperature as the Sb-doping level increases. High relaxor degree γ = 1.97 of M 1 –M 2 peak is achieved in the AgNb 0.98 Sb 0.02 O 3 ceramics, showing typical relaxor antiferroelectric characteristics. Simultaneously, the relaxor characteristics lead to lower remanent polarization values, a finer P–E hysteresis loop, and an improved AFE phase in AgNb 0.98 Sb 0.02 O 3 ceramics. Compared to pure AgNbO 3 , AgNb 0.98 Sb 0.02 O 3 ceramics have a higher recoverable energy density ( J rec = 1.70 J/cm 3 ) and higher energy efficiency ( η = 30.05%).
研究领域:
材料科学
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无机非金属材料
·
能源存储材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Fanjun Zeng,Zilong Cao,Changlai Yuan,Fei Liu,Baohua Zhu,Hequn Xiao,Jianwang Wu,Xiao Liu,Liufang Meng,Changrong Zhou,Guanghui Rao
In RF devices, the microwave ceramics possessing an ultrahigh dielectric constant are instrumental in facilitating the miniaturization of electronic components. However, ceramic systems with ultrahigh dielectric constant are rare and typically exhibit poor temperature stability and high dielectric loss. Research on developing new systems with ultrahigh ε r , low dielectric loss, and low τ f is crucial. The microwave ceramics of (1- x ) CaTiO 3 - x AgNbO 3 [(1- x ) CT- x AN, x = 0.4–0.8] were synthesized via solid-state reaction. The XRD and Rietveld analysis data have confirmed that the CT-AN ceramic system is in an orthorhombic structure with a space group of Pbcm . Elevated AgNbO 3 content leads to increased grain size in ceramics. These ceramics possess a high relative density (>98 %) and show excellent microwave dielectric properties. With increasing AgNbO 3 content, the ε r ascends from 106 to 886, while Q×f descends from 1500 GHz to 381 GHz. And τ f fluctuates within a range of 400–1000 ppm/°C, with a minimum of 403 ppm/°C when x = 0.5. Dielectric anomalies due to phase transitions were observed within low-frequency spanning 500 Hz to 200 k Hz, and the dielectric loss is zero at 200 k Hz at 25–100 °C. CT-AN ceramics demonstrate an ultrahigh dielectric constant, and further research into modulating its temperature coefficient of the resonant frequency could unlock their potential for applications in miniaturized antennas and capacitors.
研究领域:
材料科学
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电子工程
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 19
·1-14
·
IF 2.8
Xue Renzhong,Chu Yuanhong,Liu Xiaosong,Yang Yuping,Zhu Xiang
Bi 2/3 Cu 3 Ti 4 O 12 (BCTO) ceramics combine dual functions, namely dielectric and nonlinear current and voltage properties. Reducing dielectric loss (tan δ ) and improving nonlinear coefficient ( α ) and breakdown field strength ( E b ) are prerequisites for the application of these materials. In this work, BCTO- x wt.%AgNbO 3 (BCTO- x AN, x = 0 − 0.1) ceramics were prepared via solid state method. All ceramics exhibited a single cubic perovskite structure. AN addition led to a decrease in grain size and improved the compactness of BCTO ceramics. Optical band gap showed a downward trend with the increase in AN amount while grain boundary resistance and conduction activation energy increased to a large extent. Therefore, there was a noticeable drop in tan δ while dielectric constants ( ε ′) of samples still remained above 10 4 . AN doping also enhanced barrier height and improved nonlinear characteristics of ceramics. Finally, BCTO-0.08AN composite ceramic possessed the most optimum dielectric and nonlinear properties ( ε ′ of ~ 1.13 × 10 4 , tan δ of ~ 0.031 at 10 kHz, α of ~ 5.75, and E b of ~ 8.5 kV/cm). These results reveal that BCTO- x AN ceramics have great application potential for capacitor–varistor dual-function devices.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Mingyuan Zhao,Jing Wang,Hao Yuan,Zehan Zheng,Lei Zhao
AgNbO3-based Pb-free antiferroelectric (AFE) ceramics have attracted increasing interest owing to their excellent potential in energy storage applications. Herein, a high recoverable energy storage density (Wrec) of 7.62 J/cm3 is realized in La-doped AgNbO3 ceramics prepared via tape casting. The high Wrec is attributed to high breakdown strength Eb of 380 kV/cm induced by dense microstructure as well as fine grain size and enhanced AFE stability stemming from M2 phase and reduced tolerance factor t. The high Wrec exceeding 6 J/cm3 was maintained in a wide temperature range of 20–150 °C and exhibited frequency stability with less than 8% variation in a range of 1–200 Hz. The discharge energy density Wd exhibited temperature stability at 30–110 °C with less than 9% variation. Our research provides a good method for producing AgNbO3-based ceramics having high energy storage performances.
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
PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2021
·Vol. 54
·期 40
·405501
·
IF 3.207
Xiaodan Cao,Chenchen Wang,Kai Han,Xianmao Lu,Nengneng Luo,Kailiang Ren
In the past few decades, ceramic/polymer nanocomposites have been extensively studied due to their relatively large dielectric constant, high electric energy density, and large charge–discharge efficiency. Antiferroelectric (AFE) materials possess a low remnant polarization (Pr) and relatively high saturation polarization (Ps), which can induce higher storage energy density than relaxor ferroelectric materials. In this investigation, AgNbO3-based AFE ceramic nanoparticles were grafted with a layer of poly(methyl methacrylate) (PMMA) to form AgNbO3–g-PMMA nanoparticles and then the obtained nanoparticles were embedded into a poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) matrix to form an AgNbO3–g-PMMA/PVDF-HFP (AN–g-PMMA/HFP) nanocomposite film. After characterization, it was found that the dielectric constant of the AN–g-PMMA/HFP-5 (5% AgNbO3) nanocomposite film was 12.3, which was 43% higher than that of the pristine PVDF-HFP film. The AN–g-PMMA/HFP-5 nanocomposite film exhibited the largest breakdown field of 500 MV m−1 and the highest energy density of 13 J cm−3, which was increased by 32.5% (from 9.82 to 13 J cm−3), as compared with that of the pristine PVDF-HFP film. The AN–g-PMMA/HFP-5 film exhibited a charge–discharge efficiency of 69.5% at 500 MV m−1, which is 9.5% higher than that of the pristine PVDF-HFP film. This AgNbO3-based nanocomposite film shows great promise for AFE nanocomposite for high energy density capacitor applications.
研究领域:
材料科学
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电气工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
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IF 2.93
Weirong Zhao,Zhuyu Ai,Xi Zhu,Meng Zhang,Qiaomeng Shi,Jiusong Dai
(AgNbO 3 ) 1− x (SrTiO 3 ) x samples were successfully employed as photocatalysts for photocatalytic hydrogen evolution under visible light. The samples were characterized by a series of techniques, including X-ray diffractometry, scanning electron microscopy, UV–Vis spectrophotometry , and electrochemistry technology. The band gaps of (AgNbO 3 ) 1− x (SrTiO 3 ) x solid solutions can be tuned continuously from 3.21 to 2.65 eV and the flat-band potentials ( V fb ) can be shifted positively from −0.79 to −0.31 V vs. SHE when x decreased from 1 to 0. Band positions of (AgNbO 3 ) 1− x (SrTiO 3 ) x samples were further testified by density functional theory, suggesting that the band gap narrowing of the solid solutions derived from the hybridization of (Ti 3d and Nb 4d) and (O 2p and Ag 4d) orbital. The photocatalytic activities of samples for H 2 evolution with Pt cocatalyst were evaluated in aqueous methanol solution under visible light irradiation . The highest photocatalytic activity was obtained at (AgNbO 3 ) 0.25 (SrTiO 3 ) 0.75 . Photocatalytic activity in hydrogen evolution of these solid solutions proved to be closely dependent on band structures .
研究领域:
材料科学
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能源化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zaizai Yu,Bowen Zhan,Binghui Ge,Yingtao Zhu,Ying Dai,Guangjun Zhou,Fapeng Yu,Peng Wang,Baibiao Huang,Jie Zhan
The efficiency and stability of plasmonic photocatalysts that closely related with microstructure characteristics are intensively studied for practical applications. Here, a plasmonic photocatalyst Ag/AgNbO 3 was successfully synthesized by a facile combustion method, and systematically characterized by XRD, XPS , DRS, SEM, TEM and photocurrent techniques. The photocatalytic activity of Ag/AgNbO 3 as a function of Ag vs Nb contents are assessed toward Rhodamine B (RhB) and tetracycline (TC) degradation under the visible-light. At an optimal Ag content, the greatest photocatalytic efficiency of as-prepared Ag/AgNbO 3 on photodegradation of RhB (0.0447 min −1 ) was 2 times higher than that of currently reported solvents routes (0.0213 min −1 ). Meanwhile, the experimental and theoretical studies were conducted to examine the photocatalytic efficiency and stability of the as-prepared photocatalysts, the results show that the photocatalytic efficiency and stability are related with the SPR effect, ferroelectric polarization, specific exposed crystal-facets and interfacial crystallinity . This work may also provide new ideas for the design and preparation of other highly efficient and stable plasmonic photocatalysts.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 36
·18950-18961
·
IF 14.511
Ying Jiang,Zhangmeng Luo,Yue Huang,Meng Shen,Haitao Huang,Shenglin Jiang,Yunbin He,Qingfeng Zhang
Inorganic ferroelectric/polymer nanocomposite based dielectric capacitors possess fast charge/discharge rates, but they deliver low discharged energy density (Ue) and charge–discharge efficiency (η) due to the large remnant electric displacement (Dr), limiting their use in modern integrated electronic devices. In this study, AgNbO3 (AN) lead-free antiferroelectric (AFE) nanoparticles (NPs) with near-zero Dr and large Dmax are added into poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)) polymers to suppress Dr and improve Dmax of the nanocomposites. Furthermore, polyimide (PI)–AN NPs/P(VDF-HFP) bilayer nanocomposites are designed and fabricated by adding a linear PI layer with low dielectric constant and high η to improve the interface polarization and make the D–E loops slimmer. Consequently, benefiting from a large Eb of 4504 kV cm−1, high Dmax of 7.06 μC cm−2, high Dmax − Dr of 6.52 μC cm−2 and low dielectric loss of 1%, the PI–5 wt% AN NPs/P(VDF-HFP) bilayer nanocomposites exhibit simultaneously a large Ue of 13.77 J cm−3 and high η of 86.87%, outperforming recently reported dielectric nanocomposites in terms of overall energy storage properties. Finite element simulations demonstrate that the introduction of the PI layer causes redistribution of the applied electric field, which restrains the growth of electrical trees at the interfaces of PI and AN NPs/P(VDF-HFP) layers, resulting in a significant enhancement of the Eb. This work refutes the notion that large Ue and η cannot be achieved simultaneously in one kind of nanocomposite and sheds light on developing environmentally friendly dielectric capacitors applicable in modern pulse power systems.
研究领域:
材料科学
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电气工程
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纳米技术
·
能量存储
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DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-15
·
IF 3.9
Khan Muhammad Zeeshan,Aslam Farooq,Alsaif Faisal
The advancement of industrial technology has led to power modules facing challenges such as elevated temperatures, high voltages, and increased frequencies. The conventional epoxy resin (Ep) fails to satisfy the demands of high voltage and superior insulation. This study involved the synthesis of Ep resin/ AgNbO 3 nanocomposites aimed at addressing insulating flaws. AgNbO 3 was modified using the silane coupling agent KH550. The changes in the molecular chain after incorporating of unmodified and modified AgNbO 3 were evaluated through FTIR analysis. The SEM results indicate that following modification, AgNbO 3 particles are evenly distributed within the Ep resin matrix, demonstrating a lack of agglomeration. From thermal conductivity result it was found that modification of AgNbO 3 shows an enhancement of thermal conductivity, attributed to the reduction of interfacial phonon scattering and thermal resistance within the Ep resin. Additionally, the dielectric constant and dielectric loss in composites are greatly impacted by the addition of AgNbO 3 . According to the DC breakdown strength result, the addition of modified AgNbO 3 enhanced the process and caused deeper traps to form inside the bulk matrix. The distribution of trap energy levels is determined by Thermal Stimulated Depolarization Current (TSDC), which indicates that the incorporation of AgNbO 3 results in an increase in trap energy levels. Furthermore, the incorporation of 1 wt% AgNbO 3 particle into Ep resin has been observed to enhance the energy level of deep traps. After AgNbO 3 was added, DC Flashover in both air and vacuum significantly increased in comparison to pure Ep resin.
研究领域:
材料科学
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电气工程
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聚合物复合材料
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介电材料与电气绝缘
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materiomics
·
2026
·
IF 9.6
Yichong Chen,Yingzhuo Lun,Chaobo Liang,Honghe Yao,Maohong Li,Tingjun Wang,Cheng Zhu,Yingtao Zhao,Jiawang Hong,Xueyun Wang
Flexible polymers have garnered significant interest in the field of flexoelectricity due to their capacity to endure substantial strain gradients. However, the flexoelectric coefficients of these polymers are generally lower than those of ferroelectric ceramics, thereby restricting their application potential in sensor technologies. In this study, we propose a method to augment the flexoelectric coefficients of polyvinylidene fluoride (PVDF) films through the incorporation of silver niobate (AgNbO 3 ) nanoparticles and nanofibers. Owing to the enhancement in dielectric constant resulting from the introduction of AgNbO 3 , the flexoelectric coefficients of the PVDF composite films increased with the concentration of AgNbO 3 achieving a maximum value of 20.6 nC/m, which represents a 2.6-fold increase compared to pure PVDF. Based on this, a multilayer flexible sensor embedded with the PVDF composite films was designed for monitoring human joint motion. The measured flexoelectric current was found to increase with the finger bending angle, and the result was in good agreement with the theoretical prediction. This research provides an effective method for enhancing the flexoelectric response of flexible PVDF-based polymer films and offers novel insights into the development of wearable flexible electronic devices.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhe Song,Qixuan Gao,Xiting Yue,Chunyan Xiao,Haoyi Ma,Jiatian Lu
The contamination caused by organic dyes has become a critical global environmental issue. Developing effective and sustainable methodologies for the degradation of these pollutants is of utmost importance. In this study, we successfully fabricated the AgNbO 3 /Ag 3 PO 4 heterostructure through a combination of hydrothermal synthesis and in situ precipitation techniques. We systematically assessed the photocatalytic degradation efficacy of pristine AgNbO 3 , pristine Ag 3 PO 4 , and the AgNbO 3 /Ag 3 PO 4 heterostructure on Rhodamine B (RhB) under visible light irradiation. The results indicated that within 60 min, the AgNbO 3 /Ag 3 PO 4 heterostructure achieved a degradation efficiency of 94.77 %, markedly surpassing the 13.10 % and 72.06 % efficiencies observed for pristine AgNbO 3 and Ag 3 PO 4 , respectively. The removal efficiency of TOC reached 50.76 %. This enhanced photocatalytic performance is attributed to the reduced recombination rate of photogenerated electron-hole pairs, facilitated by the heterostructure formation. Notably, the AgNbO 3 /Ag 3 PO 4 heterostructure demonstrated exceptional stability, retaining significant photocatalytic activity even after four successive cycles. Moreover, the plausible degradation pathways of RhB were explained in detail using LC-MS. This study highlights a green synthesis approach that is straightforward, eco-friendly, and cost-effective for preparing AgNbO 3 /Ag 3 PO 4 with superior photocatalytic activity and stability for dye degradation under visible light irradiation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Mingyuan Zhao,Xiaoshuai Shen,Jing Wang,Jing Wang,Ji Zhang,Lei Zhao
Antiferroelectric (AFE) dielectrics are considered promising materials for pulse power applications due to their high energy density . However, the energy storage performance of AgNbO 3 lead-free AFE ceramics suffers from low breakdown strength ( E b ) and weak AFE stability at room temperature. Along these lines, in this work, the tape-casting process together with Eu-doping was used to improve E b and enhance AFE stability of the AgNbO 3 ceramics. As a result, an ultrahigh recoverable energy storage density of 10.0 J/cm 3 was obtained in the (Ag 0.91 Eu 0.03 )NbO 3 ceramic, which surpasses all the reported values of AgNbO 3 -based ceramics in the literatures. Meanwhile, the recoverable energy storage density of (Ag 0.91 Eu 0.03 )NbO 3 ceramic showed excellent temperature- and frequency-stability. Interestingly, a remarkable discharge energy density of 8.0 J/cm 3 was obtained in the pulsed charge/discharge test. These results clearly indicate that the (Ag 0.91 Eu 0.03 )NbO 3 ceramics prepared via the tape-casting process exhibit great potential for energy storage applications and shed light on the design of energy storage ceramics in other materials.
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高影响因子
危险品化学品经营许可证（带存储）