Nanomaterials
·
2025
·Vol. 15
·期 8
·569
·
IF 4.3
Jin Hu,Fangfang Liu
The low energy density (Ud) of polymeric dielectrics is unfavorable for the integration and miniaturization of electronics, thus limiting their application prospects. Introducing high-εr(dielectric constant) ceramic nanofillers to polymer matrices is the most common strategy to enhance theirεr,and hence theirUd. By comparison, enhancing breakdown strength (Eb) is a more effective strategy to enhanceUd. Herein, 0.6BaTiO3-0.4Bi(Mg0.5Ti0.5)O3and 0.85BaTiO3-0.15Bi(Mg0.5Zr0.5)O3nanofibers coated with SiO2were utilized as fillers in PVDF-based nanocomposites. The combination of experimental and simulation results suggests that the intrinsic properties of nanofillers are the determining factor of theEbof polymer-based nanocomposites, and SiO2coating and film structure design are effective strategies to enhance theirEb, and consequently theirUd. As a result, the sandwich-structured PVDF/6 wt% 0.85BaTiO3-0.15Bi(Mg0.5Zr0.5)O3@SiO2nanofiber within PVDF/PVDF nanocomposite films achieved a maximumUdof 11.1 J/cm3at anEbof 458 MV/m, which are 2.15 and 1.40 times those of pristine PVDF, respectively.
研究领域:
材料科学
·
电气工程
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 10
·1-8
·
IF 2.8
Liu Yingchun,Meng Xianghe,Shi Wenming,Deng Yuanhao,Zhang Hongjun
The high-temperature poling strategy (110 °C, 30 kV/cm, 20 min) was imposed on Cu-doped (Ba 0.94 Ca 0.06 )(Zr 0.05 Ti 0.95 )O 3 ceramics which had the Curie temperature of 117 °C, to enhance the piezoelectric performances. The high-temperature poled piezoelectric constants d 33 and electromechanical coupling factors k p were 410 pC/N and 0.516, which were enhanced by 17.1% and 15.4%, respectively, higher than that of traditional poled ones. Effects of high-temperature poling on the switching characteristic between non-180° and 180° domains were verified by the intensity ratio of splitting peaks at 2 θ around 45°, using the X-ray diffraction analysis. The high-temperature poled samples showed more asymmetric hysteresis loops, with higher internal bias field of 1.8 kV/cm, maximum polarization of 18.5 μC/cm 2 , and residual polarization of 10.7 μC/cm 2 , but lower coercive field of 2.5 kV/cm and smaller positive hysteresis of 1.3%. The high-field piezoelectric constant d 33 * showed a pronounced jump of 112.2 pm/V at 110 °C, confirming the optimal poling temperature. The stronger compensating defect dipole field mainly contributed to the asymmetry. And the tiny and easily reversible domains, observed by the in-situ piezoelectric force microscopy, were responsible to the improvement on piezoelectricity.
研究领域:
材料科学
·
物理学
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2018
·Vol. 102
·期 4
·1776-1783
·
IF 2.956
Yu Dan,Haojie Xu,Yangyang Zhang,Kailun Zou,Qingfeng Zhang,Yinmei Lu,Gang Chang,Qi Zhang,Yunbin He
Lead lanthanum zirconate stannate titanate (PbLa(ZrSnTi)O 3 ) antiferroelectric (AFE) ceramics are widely used in dielectric capacitors due to their superior energy-storage capacity. Generally, these ceramics can be synthesized by solid-state reaction and sol-gel methods. Ceramics prepared using the sol-gel method have a purer phase than those prepared using the solid-state reaction method because the sol-gel method can avoid the segregation of Sn. However, because the commonly used raw material tin acetate is very expensive, the preparation of PbLa(ZrSnTi)O 3 AFE ceramics via the sol-gel method is not cost-effective, which prevents the use of sol-gel method for manufacturing PbLa(ZrSnTi)O 3 in a large scale. In this work, low-cost dibutyltin oxide instead of expensive tin acetate is used to synthesize Pb 0.97 La 0.02 (Zr 0.50 Sn 0.45 Ti 0.05 )O 3 (PLZST) nanopowders, and single-phase powders with a perovskite structure and average grain size of 200 nm are obtained at a calcination temperature of 580°C. In addition, dense PLZST AFE ceramics with a pure perovskite structure are obtained by sintering the PLZST nanopowders at temperatures as low as 1100°C. The sintered PLZST ceramics exhibit a room-temperature recoverable energy-storage density as high as 1.93 J/cm 3 with an efficiency of 75%, which varies only slightly in the temperature range of 20-120°C. The high energy-storage density (>1.9 J/cm 3 ) over a wide temperature range illustrates that the sol-gel-derived PLZST ceramics with low-cost dibutyltin oxide are quite promising for manufacturing pulse power capacitors.
研究领域:
材料科学
·
能源存储
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiyue He,Bijun Fang,Shuai Zhang,Xiaolong Lu,Jianning Ding
Nanoscale [(Ba 0.85 Ca 0.15 ) 0.995 Nd 0.005 ](Ti 0.9 Hf 0.1 )O 3 (Nd-BCTH) ceramics were prepared via the hydrothermal method , and the effects of sintering temperature and holding time on the phase structure, micromorphology, electrical and optical properties of the Nd-BCTH ceramics were explored. All the Nd-BCTH ceramics present rather pure perovskite structure with composition approaching rhombohedral phase around the morphotropic phase boundary (MPB) region. The highest relative density is obtained for the sample sintered at 1220 °C for 10 h. The existence of Ba 2+ , Ca 2+ , Ti 4+ , Hf 4+ and Nd 3+ is confirmed and the elements distribute rather uniformly detected by X-ray photoelectron spectrometer (XPS) and energy dispersive X-ray (EDX) analysis. The ceramics present nanoscale grain size, which tends to increase with the increase of sintering temperature and holding time, and significantly affects dielectric constant and Curie temperature . Very thin and narrow ferroelectric hysteresis loops are observed, where a considerable energy storage density (173.88 mJ/cm 3 ) and high energy storage efficiency (80.68%) are obtained at low electric field. The increase of sintering temperature and holding time induces a red shift at 400 nm absorption edge and a blue shift at 300 nm absorption edge in the Nd-BCTH ceramics, and all ceramics have a maximum absorption value at around 260 nm. Under the excitation of 269 nm light, the Nd-BCTH ceramics show the strongest fluorescence peak at 473 nm, corresponding to the 4 G 3/2 → 4 I 9/2 transition, emitting indigo blue fluorescence. When the ambient temperature is above 400 °C, grains conduction dominates the conductive mechanism in the nano-sized Nd-BCTH ceramics. Such conduction can be attributed to oxygen vacancies caused due to the evaporation of alkaline-earth metals during high temperature sintering, and show typically thermally excited relaxation process.
研究领域:
材料科学
·
物理学
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高影响因子
Nature Communications
·
2026
·Vol. 17
·期 1
·1699
·
IF 15.7
Sui Huiting,Lou Wenhua,Xiao Shibing,He Jia,Wu Fuling,Liu Ying,Wei Jianbiao,Lu Haijie,Sun Huajun,Ma Xiaoguang,Zhang Shujun
Defect microstructures, particularly dislocations, are pivotal in determining the functional properties of ferroelectric thin films. While their density is routinely considered, the critical role of their spatial configuration has remained largely unexplored and difficult to control. Here, we develop a controlled self-assembly strategy for dislocations in Bi(Fe,Mn)O 3 thin films on Ni-Cr that directly addresses this challenge. By employing a LaNiO 3 buffer layer, we template a discontinuous-columnar grain structure and guide the self-assembly of edge dislocations along grain boundaries in a topologically-protected configuration. The resulting ordered microstructure promotes a more uniform strain field and more coherent FeO 6 octahedral tilting, significantly enhances polarization homogeneity, leading to a lower domain-switching barrier and a more uniform domain pinning effect. Consequently, the BFMO thin film exhibits dramatically superior aging stability after 60 days at 60 °C, exhibiting far smaller reductions in remanent polarization (~20%) and coercive field (~35%) compared to the BFMO thin film grown directly on Ni-Cr. These findings establish a defect engineering paradigm wherein the deliberate dislocation rearrangement is leveraged to unlock superior ferroelectric performance.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Siqi Guo,Wei Feng,Qingyuan Wang,Ruichong Chen
Advanced tritium breeder materials with high lithium density, robust mechanical strength, and fine grain size are prerequisites for the safe and efficient operation of fusion blankets. While Li 2 TiO 3 -Li 4 SiO 4 biphasic ceramics have been developed to balance the trade-offs between single-phase breeders, achieving rigorous control over microstructure stability at elevated temperatures remains a challenge. In this work, a dual-optimization strategy combining solid solution strengthening and biphasic compositing was proposed. Novel Li 2 (Ti,Zr)O 3 -Li 4 SiO 4 ceramic pebbles with various phase ratios (Ti/Si atomic ratio = 1:0.5, 1:1, and 1:2) were successfully prepared for the first time. The introduction of Zr into the Li2TiO3 lattice serves as a grain growth inhibitor, while the Li 4 SiO 4 phase enhances sinterability. The results indicate that pure-phase and well-crystallized powders can be obtained at 700 °C. Interestingly, the addition of Li 4 SiO 4 was found to hinder the phase transition of Li 2 (Ti,Zr)O 3 effectively. Benefiting from the synergistic effect, the pebbles sintered at 1000 °C exhibit a refined grain size of <2 μm, significantly smaller than that of traditional Li 4 SiO 4 -based ceramics. Meanwhile, a satisfactory relative density of ∼82 %T.D. and a high crushing load of >70 N were achieved due to the improved sinterability. This study demonstrates that the Li 2 (Ti,Zr)O 3 -Li 4 SiO 4 ceramic, which integrates the advantages of structural stability from solid solutions and mechanical robustness from biphasic composites, holds great promise as a high-performance tritium breeder.
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ELECTROCHEMISTRY COMMUNICATIONS
·
2021
·
IF 4.724
Wei Xu,Xu Gao,Yige Zhou,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji
An electrochemical collision method is utilized to compare the sodium de-insertion process in particles of quarternary sodium-containing layered metal oxides Na x TMO 2 (TM = Fe, Mn, Ni, Cu) in the O3 phase and the P2 phase. The electrochemical behavior of the two types of materials is found to be different. The diffusion of Na + inside an individual particle occurs more readily in O3-type oxides than in P2-type oxides, which is contrary to the conventional wisdom that P2-type oxides usually provide higher Na-ion conductivity than their O3 analogs. These results provide a more detailed analytical perspective for assessing battery materials.
研究领域:
电化学
·
电池材料
·
储能
·
材料科学
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高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Mengcheng Zhou,Hongxia Chen,Shuangwu Xu,Xinyu Zhang,Rihuang Nie,Cheng Li,Yutian Yang,Hongming Zhou
O3-type layered oxide materials are regarded as the most application-prospective cathode materials for sodium-ion batteries owing to the high theoretical specific capacity and good full-cell matching. However, there are still problems, such as poor rate performance and low available specific capacity. In this paper, we propose to overcome the above-mentioned problems by using K to replace the Na sites of O3-NaNi0.5Mn0.3Ti0.2O2 materials. A series of K-doped materials, KxNa1–xNi0.5Mn0.3Ti0.2 (x = 0, 0.025, 0.05, 0.075), were successfully synthesized. When the doping amount is 0.05, the available specific capacity and rate performance are significantly improved. The K0.05Na0.95Ni0.5Mn0.3Ti0.2 sample exhibits an initial discharge specific capacity of 151.6 mAh g–1 at 0.1C (1C = 200 mA g–1), in the voltage window of 2.0–4.2 V, while the pristine one only delivers 135.8 mAh g–1 at 0.1C. It still delivers an initial discharge specific capacity of 119.8 mAh g–1 at 5C and 70.2 mAh g–1 after 200 cycles, while the pristine one only has a specific capacity of 36 mAh g–1 after 200 cycles. The X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS), and galvanostatic intermittent titration technique (GITT) tests were conducted to investigate the effect of different K doping amounts on the crystal structure and electrochemical properties. The results indicate that the expanded Na layer spacing and improved Na+ diffusion coefficient are the primary reasons for the improved electrochemical properties. This finding could provide insights into improving the rate performance and available specific capacity of the O3-type layered oxide materials.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Haiyu Wang,Linghui Peng,Guiying Li,Hongli Liu,Zhishu Liang,Huijun Zhao,Taicheng An
Catalytic ozonation is a promising bioaerosol control technology, as O 3 is prevalent in atmosphere. However, O 3 at atmosphere concentration has limited oxidation potential and reactive oxygen species (ROSs) production, leading incomplete bioaerosol inactivation. Therefore, a catalytic ozonation system with a manganese dioxide/Ni foam (MN) was prepared for efficient bioaerosol inactivation. The MN exhibited superior activity in catalytic ozonation bioaerosol inactivation, achieving 91.6% inactivation efficiency within 8.07 s at atmospheric concentration (0.1 ppm) of O 3 . The inactivation efficiency can be further improved to 99.0% by regulating surface oxygen vacancies (O V ) in MN, which is mainly attributed to abundant O V of MN that facilitate rapid conversion of O 3 to other ROSs. Meanwhile, the mechanism of rapid bacterial inactivation was also clarified at cellular level, showing that ROSs caused bacterial oxidative stress. This catalytic ozonation strategy would offer more choices to design efficient O 3 catalysts for bioaerosol control and public health protection.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Rui Zhang,Pengbin Wang,Qinghu Guo,Jiale Long,Taixiang Huang,Zhonghua Yao,Minghe Cao,Hanxing Liu,Hua Hao
Piezoelectric ceramics with high strain response and low hysteresis are highly in demand for high-performance actuator applications. Unfortunately, the trade-off relationship between large field-induced strain and low hysteresis in piezoelectric ceramics is a key challenge for designing high-performance piezoelectric actuators. Herein, y mol%La-doped 0.10 Pb(In 1/2 Nb 1/2 )O 3 - x PbZrO 3 -(0.90 – x )PbTiO 3 [0.10PIN- x PZ-(0.90-x)PT: y mol%La] ternary relaxor ferroelectric ceramics were prepared by conventional solid-state reaction technique. Pb(In 1/2 Nb 1/2 )O 3 (PIN) as a relaxor end member was introduced into (Pb,La) (Zr,Ti)O 3 (PLZT) system to improve relaxor characteristics and strain properties. A giant strain of 0.23% was obtained in 0.10PIN-0.59PZ-0.31 PT: 8mol%La ceramic at the electric field of 20 kV/cm, with a high piezoelectric d 33 * of 1150 pm/V and low hysteresis H y of 6.4%, exhibiting a potential application in high-performance piezoelectric actuators. Furthermore, the effects of La ion doping and components on the ferroelectric, dielectric and electric field-induced strain properties were investigated, and provides a new way for improve the strain properties of piezoelectric materials .
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Frontiers in Plant Science
·
2018
·
IF 3.677
Guo Honggang,Sun Yucheng,Yan Hongyu,Li Chuanyou,Ge Feng
Elevated ozone (O3) can alter the phenotypes of host plants particularly in induction of leaf senescence, but few reports examine the involvement of phytohormone in O3-induced changes in host phenotypes that influence the foraging quality for insects. Here, we used an ethylene (ET) receptor mutant Nr and its wild-type to determine the function of the ET signaling pathway in O3-induced leaf senescence, and bottom-up effects on the performance of Bemisia tabaci in field open-top chambers (OTCs). Our results showed that elevated O3 reduced photosynthetic efficiency and chlorophyll content and induced leaf senescence of plant regardless of plant genotype. Leaf senescence in Nr plants was alleviated relative to wild-type under elevated O3. Further analyses of foliar quality showed that elevated O3 had little effect on phytohormone-mediated defenses, but significantly increased the concentration of amino acids in two plant genotypes. Furthermore, Nr plants had lower amino acid content relative to wild-type under elevated O3. These results provided an explanation of O3-induced increase in abundance of B. tabaci. We concluded that O3-induced senescence of plant was ET signal-dependent, and positive effects of O3-induced leaf senescence on the performance of B. tabaci largely resulted from changes of nutritional quality of host plants.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Linjing Liu,Bin Yang,Shuai Yang,Qiangwei Kou,Hang Xie,Yuan Sun,Yunfei Chang,Shan-Tao Zhang,Fei Li
Grain-oriented Pb(Mg 1/3 Nb 2/3 )O 3 -PbZrO 3 -PbTiO 3 (PMN-PZ-PT) based ceramics were synthesized through templated grain growth via using BaTiO 3 (BT) templates. Although BT templates are partially destroyed by PMN-PZ-PT matrix, CuO addition remarkably promotes [001] c -oriented grain growth behavior of the ceramics, resulting in an improvement of Lotgering factor F 001 from ~86% to 98%. Both crystallographic texture and CuO doping increase tetragonality and reduce average domain size of the ceramics dominated by rhombohedral phase. Consequently, 0.50 wt% CuO-doped ceramics ( F 001 ~98%) exhibit optimum electromechanical properties: d 33 ~860 pC/N, d 33 × g 33 ~48.6 × 10 −12 m 2 /N, k p ~0.80, E c ~7.2 kV/cm, tan δ ~0.8% and T c ~222 °C. In addition to ~3.7 times and 6.6 times higher d 33 and d 33 × g 33 , those ceramics possess about 240% enhanced piezoelectric strain and much better thermal stability ( S max / E max variation ≤2% between RT and 150 °C) relative to non-textured counterpart. This work offers a good paradigm for simultaneously exploring high piezoelectric response and good temperature stability in piezoceramics, benefiting the development of next-generation advanced electromechanical devices.
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