IONICS
·
2018
·Vol. 24
·期 12
·3975-3982
·
IF 2.347
Wang Lu,Luo Hang,Zhou Xuefan,Wei Anqi,Zhou Kechao,Chen Zhuo,Zhang Dou
As the electronic industry developed rapidly, greater demands are required on the performance of dielectric composites, such as high permittivity, low dielectric loss, and high-energy density. Improving the compatibility of fillers in polymer matrix and uniform distribution of the electric field could increase the permittivity of such composites. Therefore, BaTiO 3 nanoparticles were coated by TiO 2 sol to fabricate BaTiO 3 @TiO 2 core-shell structured fillers in this paper. BaTiO 3 @TiO 2 fillers with gradient permittivity were firstly modified by dopamine in order to disperse in the composites homogeneously and adhere to poly(vinylidene fluoride- co -hexafluoropropylene) (P(VDF-HFP)) matrix tightly. At 1 kHz, the permittivity of the composite with 20 vol% BaTiO 3 @TiO 2 was 32.15, obviously larger than that of pure P(VDF-HFP) (6.92), and the dielectric loss was just 0.052. Consequently, the discharged energy density of the composite was enhanced to 0.23 J/cm 3 at 40 kV/mm, which was two times higher than that of pure P(VDF-HFP). This work provides a feasible approach to prepare high-performance dielectric composites.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Jinxi Feng,Yao Fu,Xiaosheng Liu,Shuanghong Tian,Shenyu Lan,Ya Xiong
Piezoelectric effect was first used for disinfection. In this process, hydrothermally synthesized nano/micrometer tetragonal-BaTiO3 was selected as the piezo-catalyst which was stressed by ultrasound to generate piezoelectric potential. It was found that the inactivation number of the nano/micrometer tetragonal BaTiO3 exposure or sonication alone within 180 min was 0.30 log and 0.70 log for E. coli in deionized water, respectively, while addition of 2 g tetragonal-BaTiO3 with piezo-activity in the ultrasound system resulted in a 2.72 log inactivation without the input of any additional energy, only by original ultrasound. The latter was 2.72 folds as great as the sum of the two former inactivation numbers. However, addition of cubic-BaTiO3 without piezo-activity only led to a 1.02 log inactivation. And moreover, in the process of serious physical damage and chemical oxidation of cells, substantial leakages of intracellular materials were observed. These great differences not only clearly indicated that the combination of sonication and piezocatalysis possessed a great inactivation potential but also suggested that there was a significant synergistic inactivation effect between piezocatalytic oxidation and sono-mechanical destruction.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 5
·4204-4210
·
IF 1.798
Huang Xuechen,Zhang Wenqin,Xie Juan,Xu Qi,Zhang Lin,Hao Hua,Liu Hanxing,Cao Minghe
Nb 2 O 5 doped 0.8BaTiO 3 –0.2(Na 1/4 Bi 3/4 )(Mg 1/4 Ti 3/4 )O 3 (0.8BT–0.2NBMT) polycrystalline ceramics were prepared by solid state reaction method. 0.8BT–0.2NBMT samples were observed to possess two dielectric peaks, which were attributed to the formation of core–shell structure (Huang et al. in J Eur Ceram Soc 36:533–540, 2015 ). Longer sintering induced uniform distributions of the additives. The introduction of Nb 2 O 5 into 0.8BT–0.2NBMT could obviously bring about the improvement of the dielectric temperature stability, the degradation of the dielectric loss at room temperature and the decrease of the sintering temperature. The 0.8BT–0.2NBMT ceramics doped with 2.0 at% Nb 2 O 5 could satisfy the temperature range of the X9R (−55 to 200 °C, △C/C 25°C = ±15% or less) characteristics, with a moderate dielectric constant of 1130, low dielectric loss of 0.7%, low sintering temperature of 1050 °C and insulation resistivity of 5 × 10 12 Ω cm at room temperature, which might be promising for practical use in multilayer ceramic capacitors. The inhomogeneous distribution and the existence of the secondary phases were responsible for this excellent dielectric temperature characteristic. The complex impedance analysis was introduced to elaborate the conduction mechanism.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Longwen Wu,Xiaohui Wang,Longtu Li
Core-shell BaTiO 3 @BiScO 3 (BT@BS) particles were fabricated via a facile sol-precipitation method, with which bulk ceramics were prepared via conventional sintering. Pure perovskite phases of the BT@BS ceramics were confirmed by XRD patterns. Grain sizes and DC conductivities of the BT@BS ceramics are suppressed in comparison with pure BT. Dielectric-temperature measurements show that with the addition of BS, the tetragonal-orthorhombic and orthorhombic-rhombohedral peaks sequentially disappear with gradual broadening and dispersion of Curie peaks. Wide and flat dielectric-temperature plateau is achieved in the ceramic with 3 mol% BS coatings, which is due to the formation of local compositionally graded structure from the modulated diffusion of Bi and Sc. Weakened polarization nonlinearity and reduced hysteresis are achieved in the BT@BS ceramics, which contribute to enhanced energy storage capability. This work provides a generic avenue for fabricating temperature-stabilized dielectrics with improved energy storage density.
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高影响因子
POWDER TECHNOLOGY
·
2016
·
IF 2.759
Hamid Ghayour,Majid Abdellahi
Due to the wide range of applications of ceramics , interest in investigating all the parameters that influence the properties of these materials has constantly been on the increase. In the past fifty years, various studies were conducted on the effects of grain size on the properties of different ceramics. These researches provided evidence for a behavior shared by ceramics. In the present study, a brief report of the effect of grain size on the electrical properties of the BaTiO 3 -based ceramics, which are extensively used materials in electrical industries, is presented for the first time. As the range of electrical properties of this type of ceramics is quite extensive, this paper focuses on basic issues such as dielectric and piezoelectric properties alongside polarization of BT-based ceramics. The review demonstrates that despite the same behavior of these ceramics in terms of grain size alterations, there are still inevitable parameters in the course of experiments which can change this behavior.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Li-Feng Zhu,Bo-Ping Zhang,Shun Li,Gao-Lei Zhao
The (1- x )Bi 1+ y (Fe 0.96 Mg 0.02 Ti 0.02 )O 3 - x BaTiO 3 (abbreviated as B 1+ y FMT- x BT) system was designed to explore the morphotropic phase boundary (MPB) separating rhombohedral ( R ) and tetragonal ( T ) phases, and the mechanism of performance enhancement. The phase structure of samples was discreetly investigated by X-ray diffraction, and Rietveld refinement results of the XRD data revealed that the B 1+ y FMT- x BT ceramics consist of an R phase at x = 0.24, two R and T phases at 0.26 ≤ x ≤ 0.32, and a single T phase at x = 0.34. Because of the MPB and the improvement of resistivity with adding excess Bi compensation, excellent piezoelectric properties of d 33 = 198 pC/N and k p = 30.9%, as well as high Curie temperature T C = 497 °C were achieved in the B 1+ y FMT- x BT system at x = 0.30 and y = 0.02. Here, the large d 33 = 198 pC/N which is the maximum value for the BF-BT-Bi(Mg,Ti)O 3 system so far, and high T C = 497 °C suggest that Bi(Fe,Mg,Ti)O 3 -BaTiO 3 ceramics have good prospects in high-temperature piezoelectric devices.
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RSC Advances
·
2014
·Vol. 4
·期 64
·34008-34013
·
IF 3.708
Dan Xu,Weili Li,Lidong Wang,Wei Wang,Wei-Dong Fei
BaTiO3 and 1.5 mol% AlN/BaTiO3 (AlN/BT) piezoceramics were prepared via a conventional solid-state reaction method. The effects of sintering temperature on the phase structure, preferential orientation degree of Al3+–N3− pairs and electrical properties of the ceramics were investigated and analyzed. The AlN/BT ceramic sintered at 1325 °C obtains the optimum piezoelectric properties of d33 = 305 pC N−1, kp = 0.33 and Qm = 140 due to the preferential distribution of Al3+–N3− pairs and suitable sintering temperature. The high temperature stability testing reveals that these AlN-doped BT ceramics are useable at temperatures as high as approximately 115 °C. These properties indicate that this system is a potential high piezoelectric lead-free candidate material to be further studied.
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高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Yanyan Fan,Xingyi Huang,Guanyao Wang,Pingkai Jiang
Flexible high-dielectric-constant (high-κ) nanocomposite dielectrics comprising polymer matrix and ceramic nanoparticles have important applications in the fields of electrical insulation and energy storage. However, most of the flexible high-κ nanocomposites are fabricated by using nonbiodegradable polymers as matrixes, which may not meet the increasing demands of society for environmental sustainability. In this study, using biodegradable polylactic acid (PLA) as a matrix and core–shell structured BaTiO3 (BT) nanoparticles as high-κ filler, we report the preparation and structure–property relationship of environmentally friendly flexible high-κ polymer nanocomposites. Two types of core–shell structured high-κ nanoparticles [polydopamine-encapsulated BT (BT@PDA) and PLA-encapsulated BT@PDA (BT@PDA@PLA)] as well as as-prepared BT nanoparticles were used as filler of the PLA-based high-κ nanocomposites. It was found that, compared with the as-prepared BT nanocomposites, the core–shell nanoparticle-based composites show enhanced dielectric constant, suppressed dielectric loss tangent, and enhanced breakdown strength. In addition, the BT@PDA@PLA nanocomposites have much higher dielectric constant and energy density. The nanoparticle–PLA compatibility and its influence on the dielectric and energy storage properties of the nanocomposites were also investigated. Because the polymer matrix is environmentally friendly and the preparation process of the core–shell nanoparticles is facile and nontoxic, the nanocomposites reported here may be used in the next generation of environmentally friendly high-performance energy storage devices.
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高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Haotong Guo,Chuying Zhang,Na Zhang,Liming Jin,Yanfei Gao,Jinbo Bai,Hang Zhao
The dielectric elastomer (DE) is a kind of electroactive polymer that can deform under an applied electric field. However, it remains challenging to effectively enhance the electro-actuation of the DE at low driving electric fields. Furthermore, during long-term utilization, the DE is vulnerable to aging and mechanical damage, which inevitably affects its electromechanical stability and seriously shortens its service life. Thus, it is crucial to prepare DE composites featuring large low-field-actuated strain along with self-healing capability. Herein, an ultrafine BaTiO3 (uf-BaTiO3) nanoparticle and methyl vinyl silicone (MVQ) incorporating the polydimethylsiloxane (PDMS)-based DE composite was prepared to construct a typical semi-interpenetrating polymer network. The uf-BaTiO3 nanoparticles with a large specific surface area can form more heterogeneous interfaces with the PDMS matrix, leading to a significant improvement in interfacial polarization. Meanwhile, the MVQ macromolecule can avoid the introduction of defects within DE composites due to its excellent interfacial compatibility with the PDMS matrix. In particular, an excellent electro-actuated strain of 50.7% at an electric field of 50 V/μm and a high self-healing efficiency of 76% in a short time of 15 min can be obtained from the 5 MVQ/3 wt % uf-BaTiO3/PDMS composite. This study provides a feasible route for preparing advanced DE composites with the simultaneously improved low-field electro-actuation property and self-healing capability.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 2
·1-14
·
IF 2.8
Guan Riyu,Chen Kaiyuan,Han Feifei,Yuan Zhi,Wang Dingyuan,Bai Yisong,Chen Xue,Peng Biaolin,Yan Shiguang,Yu Dongyan,Lei Xiuyun,Liu Laijun
High efficiency ( η ) is urgently desired for electronic energy storage devices. In this work, an extremely high energy storage efficiency (~ 99.5%) and energy storage density of 2.83 J/cm 3 are achieved in lead-free relaxor ferroelectric (1– x )(0.9BaTiO 3 –0.1BiMg 0.5 Ti 0.5 O 3 )- x Bi(Mg 0.5 Sn 0.5 )O 3 [(1– x ) (0.9BT–0.1BMT)– x BMS] ceramic ( x = 0.09). Excellent temperature stability with a variation of η less than 1.5% is also obtained in a wide temperature range from 30 to 150 °C. Temperature dependence of the dielectric permittivity of (1– x )(0.9BT–0.1BMT)- x BMS exhibits a typical dipolar-glass-like relaxor ferroelectric behavior. As a result, the ultra-high efficiency of the ceramic is attributed to the weak-coupling polar nanoregions (PNRs) which are analyzed using the Vogel-Fulcher formula and phenomenological statistical model. These results not only help to understand the origin of high efficiency in the (1– x )(0.9BT–0.1BMT)- x BMS system but also provide an effective approach to improve the comprehensive properties of other lead-free ceramic systems used in next-generation power capacitors.
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高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Wenbin Zhang,Jiawen Wang,Le Wang,Jun Wan,Gongxun Bai,Shiqing Xu,Liang Chen
Upconversion emissions from lanthanide ions have unparalleled advantages in the field of temperature sensing and information encryption. Despite extensive research on temperature sensing probes, developing highly sensitive temperature measurement applications still poses a significant challenge. This study utilizes lanthanide ions doped BaTiO₃ as the foundational material to develop a fiber optic probe with enhanced temperature sensitivity. The optical temperature-sensing capabilities are assessed based on the intensity ratio of various energy levels in BaTiO₃: Yb/Tm/Er phosphors. Notably, the non-thermal coupling energy level between Tm and Er demonstrates the highest sensitivity, achieving a maximum relative sensitivity of 2.70% K⁻¹ at 303 K. By leveraging the temperature-dependent color change of the material, a large-capacity photonic barcode for temperature information storage and encrypted transmission is developed, thereby expanding the potential applications of temperature monitoring.
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Nanomaterials
·
2025
·Vol. 15
·期 14
·1135
·
IF 4.3
Mingzhang Zhu,Zeren Zhou,Yanhong Gu,Lina Bing,Yuqin Xie,Zhenjiang Shen,Wanping Chen
In sharp contrast to photocatalysis and other prevalent catalytic technologies, tribocatalysis has emerged as a promising technology to degrade high-concentration organic dyes in recent years. In this study, BaTiO3(BTO) nanoparticles were challenged to degrade methyl orange (MO) solutions with unprecedentedly high concentrations through magnetic stirring. With BTO nanoparticles and home-made PTFE magnetic rotary disks in 50 mg/L MO solutions, 10 h of magnetic stirring resulted in 91.4% and 98.1% degradations in an as-received glass beaker and in a beaker with a PTFE disk coated on its bottom, respectively. Even for 100 mg/L MO solutions, nearly complete degradation was achieved by magnetic-stirring-stimulated BTO nanoparticles in beakers with the following four kinds of bottom: 97.3% degradation in 30 h for a glass bottom, 97.4% degradation in 20 h for a PTFE coating, 97.9% degradation in 42 h for a Ti coating, and 97.4% degradation in 74 h for an Al2O3coating. Electron paramagnetic resonance (EPR) analyses revealed that the generation of reactive oxygen species (ROS) by magnetic-stirring-stimulated BTO nanoparticles is dramatically affected by the bottom material of beakers. These findings suggest an appealing prospect for BTO nanoparticles to utilize mechanical energy for sustainable water remediation.
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PubMed
高影响因子
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