JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Wenming Shi,Hongjun Zhang,Yingchun Liu,Lang Bian,Wenjing Bi,Yuanhao Deng,Bin Yang
Improving mechanical quality factor Q m is of great significance for high-power applications. Here, a new strategy of the [111] c texture engineering was proposed to enhance the performances of high-power piezoelectric ceramics. The 5 vol% BaTiO 3 (BT) templates with the [111] c preferred orientation were introduced into matrix powders of 0.03 Pb(Mn 1/3 Nb 2/3 )O 3 –0.33Pb(Ni 1/3 Nb 2/3 )O 3 –0.28 PbZrO 3 –0.36PbTiO 3 (28PZ(R)) to form the [111] c textured ceramics (28PZ(T)), possessing a texture degree of 74 %. The multiple of uniform density in EBSD increased from 0.63 in randomly oriented 28 PZ(R) to 6.63 in 28PZ(T). The good lattice matching between BT templates and textured grains was observed using high-resolution transmission electron microscopy, confirming the microscopic origin of the [111] c texture. The maximum phase angle θ max of 88.2° was quite near 90° in 28PZ(T), ensuring the optimal Q m value of 1275 and the great figure of merit of 255,000 pC/N. The increased Q m in [111] c texture ceramics was confirmed due to the reduced intrinsic polarization directions rather than the pinning effect of the internal bias field. Larger grain sizes with larger domains restrained the movement of domain walls in 28 PZ(T), which was also favorable to higher Q m . This work may provide a new promising route for further high-power applications.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Mingnan Shangguan,Xiuyun Zhang,Chaoying Wang,Yunyun Zhao,Guisheng Zhu,Laijun Liu,Huarui Xu
A facile tartaric acid assisted method using metatitanic acid, barium hydroxide and tartaric acid as starting materials is proposed to prepare tetragonal BaTiO 3 fine powders. Owing to the ultrafine character of the as-formed BaCO 3 with high chemical activity, and its arrangement coating the surface of intermediate TiO 2 nanoscale needles, pure cubic phase BaTiO 3 homogeneous powders with size of about 50 nm was obtained via calcining treatment at 650 ℃, which subsequently transformed as tetragonal BaTiO 3 uniform powders with size of about 240 nm and high tetragonality (c/a=1.0095) after calcining treatment at 1050 ℃. The BaTiO 3 ceramic prepared from the BaTiO 3 uniform powders displayed much improvement performances with high permittivity of about 5980 and low dielectric loss of about 0.014 at room temperature in comparison to the BaTiO 3 ceramic prepared respectively from the BaTiO 3 synthesized via a traditional solid-state method, and commercial BaTiO 3 , suggesting it’s compatible in application of MLCCs with high performance.
研究领域:
材料科学
·
陶瓷
·
介电材料
·
纳米材料
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 50
·期 9
·15202-15208
·
IF 5.1
Xiong Huang,Pengfei Wang,Jianwei Zhao,Jun Yang,Zhenxiao Fu,Xiuhua Cao,Lei Zhang,Shuhui Yu,Rong Sun
As a dielectric material , BaTiO 3 -based ceramics are desirable for high performance ultra-thin multilayer ceramic capacitors (MLCCs) application. In this work, BaTiO 3 -based dielectric ceramics with superior dielectric properties were synthesized using a reducing atmosphere sintering process . It is found that the contribution of “wet" grain-boundary diffusion become significant as the oxygen partial pressure increases, resulting to a larger grain size and higher permittivity. Especially, for the specimen sintered in higher oxygen partial pressure , the stable temperature coefficient of capacitance (TCC) is dominated by irreversal domain due to the increase of super-lattice phase. Samples with higher oxygen partial pressure exhibit a higher permittivity of 2700 and better permittivity-temperature stability. Furthermore, ultra-thin MLCCs with thickness of 1 μm and capacitance of 10 μF and the TCC of X7R were successfully fabricated. This work provides a comprehensive explanation demonstrating upon the significant roles of grain size and defect engineering in the dielectric performance in BaTiO 3 -based ceramics, and points out an avenue to obtain excellent permittivity-temperature stability in ultra-thin MLCCs.
研究领域:
材料科学
·
电子陶瓷
·
介电材料
·
固态物理
·
功能陶瓷
·
电容器技术
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DOI
高影响因子
SOLID STATE SCIENCES
·
2020
·
IF 2.434
Xinshu Luo,Yingying Li,Kun Liu,Jingbo Zhang
BaTiO 3 is used to fabricate the electron transport layer of perovskite solar cells due to its spontaneous polarization . Li + ions were doped into BaTiO 3 by the hydrothermal synthesis to increase the spontaneous polarization. The particle size of the as-prepared BaTiO 3 nanoparticles becomes smaller and more uniform for doping of Li + ions with a molar ratio of 1.0 during the synthesis processes. The absorption edge shifts towards the short wavelength with the increase in the doping amount. Further, TiO 2 nanocrystalline thin film was deposited on the Li-doped BaTiO 3 thin film , the double layer was used as an electron transport layer of perovskite solar cell to indirectly demonstrate the effect of doping on the spontaneous polarization of BaTiO 3 . The perovskite solar cell based on BaTiO 3 with 1.0 doping molar ratio of Li + ions shows the highest light-to-electric conversion efficiency of 14.3% accompanying with the highest short-circuit photocurrent density. The measurements of impedance spectra and intensity modulating photocurrent spectra indicate that the photocurrent enhancement of perovskite solar cells is attributed to the spontaneous polarization enhancement of Li-doped BaTiO 3 thin films. The enhanced internal electric field in the BaTiO 3 thin layer accelerates the photogenerated electron transport in the electron transport layer of perovskite solar cell.
研究领域:
材料科学
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光伏技术
·
纳米材料
·
固体物理
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DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 34
·13259-13264
·
IF 8.262
Zhongbin Pan,Lingmin Yao,Jiwei Zhai,Bo Shen,Shaohui Liu,Haitao Wang,Jinhua Liu
Inorganic/polymer nanocomposites, using one-dimensional (1D) core–shell structure BaTiO3@Al2O3 nanofibers (BT@Al2O3 nfs) as fillers and poly(vinylidene fluoride) (PVDF) as the polymer matrix, have been prepared. The core–shell structure BT@Al2O3 nfs have been synthesized via coaxial electrospinning. The breakdown strength (Eb) and discharged energy density of the nanocomposites can be significantly improved by creating an insulating Al2O3 shell layer with moderate dielectric constant on the surfaces of BT nanofibers to form a moderate interfacial area. The Al2O3 shell layer could effectively confine the mobility of charge carriers, which reduces energy loss by reducing the Maxwell–Wagner–Sillars (MWS) interfacial polarization and space charge polarization between the fillers and the polymer matrix. As a result, the nanocomposite films filled with 5 vol% BT@Al2O3 nfs exhibit a excellent discharge energy density of 12.18 J cm−3 at 400 MV m−1, which is ≈254% over bare PVDF (4.8 J cm−3 at 350 MV m−1) and ≈1015% greater than the biaxially oriented polypropylenes (BOPP) (≈1.2 J cm−3 at 640 MV m−1). The work here indicates that this promising state-of-the-art method of preparing high energy density nanocomposites can be used in the next generation of dielectric capacitors.
研究领域:
材料科学
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纳米复合材料
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介电材料
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能量存储
·
聚合物物理
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Bing Xie,Wenpeng Gao,Zhiyong Liu,Kun Guo,Qingping Wang,Shenglin Jiang,Chris Bowen,Huajie Luo,Tianyu Li
Piezocatalysis, the direct conversion of mechanical energy into chemical reactivity, offers a promising route for sustainable pollutant removal and chemical synthesis. However, practical applications require materials that are able to simultaneously deliver high activity, stability, and ease of recycling. Here, we report a flexible micro-nano-engineered BaTiO 3 /PVDF@Ag composite film, whereby {111} BaTiO 3 single-crystal microsheets are embedded in a poly (vinylidene fluoride) (PVDF) matrix and decorated with photo-deposited Ag nanoparticles. This BaTiO 3 /PVDF@Ag composite microstructure design endows the optimal composite with outstanding piezocatalytic performance, including a Rhodamine B degradation rate constant of 0.24 min −1 , a hydrogen peroxide generation rate of 3520 µmol g −1 h −1 , and a CO 2 reduction rate of 535 µmol g −1 h −1 , while maintaining its activity over repeated cycles. Systematic structural, spectroscopic, and electrochemical characterization, together with theoretical simulations, reveal that the ferroelectric BaTiO 3 and electroactive β -phase PVDF enhance the local piezoelectric potential under mechanical stimulation, while the Ag nanoparticles act as efficient electron traps and catalytic sites. Interfacial polarization as resulting from the dielectric and conductivity mismatches between the composite components also reduces charge-transfer resistance and thereby accelerates carrier separation and migration. These synergistic effects enable efficient formation of reactive oxygen species, thereby driving high H 2 O 2 yields and CO 2 reduction. The mechanically robust film can also be easily recovered and reused, demonstrating a viable route to green, high-performance piezocatalysts for environmental applications.
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产品关联
DOI
高影响因子
Materials
·
2026
·Vol. 19
·期 10
·2032
·
IF 3.7
Sichen Guo,Yijing Sun,Shanxin Li,Xuzhou Jiang,Dongbai Sun
Developing lightweight materials that simultaneously achieve efficient electromagnetic wave absorption and robust corrosion resistance remains a significant challenge for marine stealth and electromagnetic protection applications. The main obstacle lies in the rational integration of electromagnetic attenuation capability, impedance matching, and corrosion protection. In this work, a multilayer carbon-structured BaTiO3@C nanocomposite (CSTB-x) was successfully fabricated via freeze-drying combined with in situ pyrolysis. During the carbonization process, chitosan (CS) was transformed into a nitrogen-doped multilayer porous carbon framework, while BaTiO3particles were embedded into the carbon matrix to construct a BaTiO3@C heterostructure. Benefiting from optimized impedance matching and the synergistic contributions of conduction loss, dipolar polarization, and interfacial polarization, CSTB-1.0 delivered a minimum reflection loss (RLmin) of −48.07 dB at 6.16 GHz with a thickness of 3.32 mm, and achieved a maximum effective absorption bandwidth (EAB) of 7.04 GHz at a thickness of 1.88 mm. In addition, CSTB-1.0 exhibited a low corrosion current density (8.93 × 10−6A/cm2) and a high polarization resistance (7.87 × 103Ω∙cm2), indicating excellent corrosion protection performance. The enhanced corrosion resistance is mainly attributed to the barrier effect of the multilayer carbon framework and the tortuous diffusion pathways generated by the porous and core–shell structures. Moreover, the material showed a minimum radar cross-section (RCS) value of −41.25 dBsm, demonstrating remarkable electromagnetic scattering suppression capability. These results provide a feasible strategy for the design and fabrication of marine stealth materials with integrated microwave absorption and corrosion resistance.
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 13
·984
·
IF 3.2
Zhao Yunyun,Zhang Shining,sang Yiqi,Zhang Xiuyun,Long Shenfeng,Wei Tingting,Zhu Guisheng,Xu Huarui
A facile hydrothermal strategy is proposed in the study for performance improvement of barium titanate (BaTiO 3 , BTO) powder synthesized via solid-state method. Benefiting from the continuous dissolution–recrystallization equilibrium reaction under hydrothermal conditions, the modified powders exhibit significantly improved uniformity and dispersibility, while maintaining high tetragonality and minimal hydroxyl defects. As a result, the ceramics derived from the modified BTO-030 and BTO-040 powders show fine-grained microstructures along with notably improved dielectric properties. Specifically, the room-temperature dielectric constants increase from 3649 to 4765 for modified BTO-030 and from 3863 to 4463 for modified BTO-040, demonstrating that the proposed modification strategy effectively optimizes BTO powders for MLCC applications.
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DOI
高影响因子
Journal of Science-Advanced Materials and Devices
·
2026
·Vol. 11
·期 3
·101207
·
IF 6.9
Lu Yang,Junjie Li,Jianzi Xu,Kun Zhang,Chunxin Ma,Wenjuan Wu,Xing Zhang
Lead-free piezoelectric ceramics with high Curie temperature are urgently demanded to replace toxic lead-based materials for environmental sustainability, among which BiFeO 3 –BaTiO 3 (BF-BT) systems show promising potential. Although chemical substitution is widely adopted to modulate properties, achieving balanced electromechanical performance in BF-BT ceramic remains challenging due to the complexity of A-site cations (Bi 3+ and Ba 2+ ) with different valence states and ionic radii. Herein, we systematically investigated site-selective Sm 3+ substitution effects on structure and properties of BF-BT ceramics. Bi-site substitution promoted grain growth and reduced leakage current via suppressed bismuth volatilization, while Ba-site substitution refined grains but severely disrupted ferroelectric ordering due to charge imbalance. Furthermore, 2/3Bi 0.995 Sm 0.005 FeO 3 -1/3BaTiO 3 (BF-BT-Bi-Sm0.005) achieved optimized comprehensive performance, exhibiting a piezoelectric coefficient of d 33 = 87 pC/N, mechanical quality factor of Q m = 101.5, Curie temperature of T m = 394 °C, and low leakage current density. These results demonstrate that low-level Bi-site substitution effectively coordinates defect chemistry, microstructure, and domain engineering to achieve superior electromechanical coupling, providing a rational design strategy for high-performance lead-free ceramics suitable for high-temperature sensing applications.
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DOI
高影响因子
Journal of Materiomics
·
2026
·
IF 10.6
Ruiling Chang,Zhonghua Yao,Hua Hao,Minghe Cao,Hanxing Liu
BaTiO 3 -based multilayer ceramic capacitors (MLCCs) with Ni inner electrodes face two critical challenges: DC bias causes a sharp decrease in the dielectric constant, and the material may become semiconducting during sintering in a reducing atmosphere. To overcome these issues, we adopted a multi-element (Y, Mn, Mg) doping strategy to successfully construct a core-shell architecture. This design significantly suppresses the decay of the dielectric constant in the core under a DC bias. A systematic analysis was conducted on the effects of sintering atmosphere and annealing on the microstructure and dielectric properties. The results reveal that the sample Y-N, sintered in a reducing atmosphere, exhibits excellent DC bias stability. This can be attributed to its higher defect concentration, which effectively inhibits the migration of oxygen vacancies. Consequently, Y-N shows only a –0.61% decay rate of the dielectric constant at 2 V/μm, while achieving remarkable temperature stability (meeting the EIA X8R specification) and frequency stability (with a –2.1% variation from 1 kHz to 1 MHz). In contrast, samples annealed in air exhibit degraded DC bias stability at high electric fields due to shell thinning. This work provides valuable insights for the development of highly reliable dielectric materials for base-metal electrode MLCCs applications.
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2026
·
IF 3.2
Xiaoyu Tong,Jiali Yang,Qian Xiao,Chenchen Xing,Yifang Ao,Yanping Hou,Zuofang Yao
The BaTiO 3 /CdIn 2 S 4 (2BTO/CIS) heterojunction photocatalysts were prepared via a self-assembly method for the degradation of levofloxacin (LEV) under visible light illumination. Compared to pure BTO and CIS, the 2BTO/CIS composite exhibited significantly enhanced photocatalytic activity, achieving LEV degradation efficiency of 86.1% within 60 minutes. The improved performance is attributed to the heterojunction structure, which broadened light absorption range, enhanced charge separation, and extended the carrier lifetime (6.07 × 10 -7 s), thereby promoting the generation of active species of ·O 2 - and h + . The charges transfer route at the interface of heterojunction driven by interfacial electric field was revealed based on radical trapping experiments, electron spin resonance (ESR) analysis, and density functional theory (DFT) calculations. According to the identified degradation intermediates, LEV degradation pathways were likely to involve depiperazinization and cleavage of the quinolone ring. Moreover, most of LEV degradation intermediates showed lower ecological toxicity. The composite also demonstrated good stability, maintaining 75.6% degradation efficiency after five cycles. This study provides reference for the potential application of perovskite-based heterojunctions in wastewater treatment.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Linyu Tao,Junhang Tang,Yuqi Shi,Guodong Jiang,Zepeng Mao
The conventional melt-mixing process for preparing ceramic-polymer dielectric composites often requires a high filler loading and results in random dispersion of fillers, which leads to an extremely low efficiency in enhancing the dielectric constant (ε') and increases processing difficulty. Enhancing the dielectric properties of composites materials at low filler contents has remained a significant challenge. In this study, silane coupling agent was selected as the bridging agent, its double bond end was copolymerized with polystyrene (PS) microspheres, and its silicon bond end was bonded with hydroxyl dehydration on the surface of ferroelectric barium titanate (BT) ceramics, so that BT particles were firmly riveted on the surface of PS microspheres (PS@BT). Then the composites with a three-dimensional (3D) segregated structure were obtained through hot-pressing PS@BT microspheres. The effects of the 3D BT network structure and its content on the dielectric properties of the composites were investigated. The results indicated that when the content of BT was only 13.7 vol%, the ε' of the composites reached 9.7 (100 kHz), significantly higher than that of the traditional randomly mixed PS/BT composites, while the dielectric loss (tanδ) remaining basically unchanged, which are significantly superior to those of composites prepared by conventional melt-blending. This method can provide guidance for the fabrication of high-performance dielectric composites.
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DOI
高影响因子
危险品化学品经营许可证（带存储）