Materials Research Express
·
2025
·
IF 2.2
Ziyi Liu,Juanjuan Xing,Shuanglong Yuan,Hua Tong
Barium titanate (BaTiO₃) nanoparticles were synthesized via a hydrothermal method using barium hydroxide (Ba(OH)₂) and titanium oxide (TiO₂) as starting materials. The present study investigates the influence of TiO₂ sources on BaTiO3 nanoparticle crystallinity and morphology. A comprehensive statistical analysis was conducted, revealing a direct correlation between the phase and size of the TiO₂ and the properties of the BaTiO₃. Anatase TiO₂, with a size ranging from 5-30 nm, was found to yield uniform spherical BaTiO₃ nanoparticles with sizes ranging from 66.1 ± 9.4 nm to 80.3 ± 10.8 nm. Conversely, rutile TiO₂, with a size of 10 nm, yielded irregular particles with an average size of 386.6 ± 146.99 nm. XRD analysis demonstrated that smaller anatase TiO₂ (5 nm) exhibited a propensity to favor cubic-phase BaTiO₃, while larger anatase TiO₂ (10–30 nm) exhibited a propensity to promote tetragonal-phase dominance. Conversely, rutile-derived BaTiO₃ exhibited a mixed phase (tetragonal-to-cubic ratio: 2:3). Kinetic studies of precursor synthesis have demonstrated that 5 nm anatase TiO₂ facilitates the rapid nucleation of BaTiO₃ within 30 seconds, reaching full conversion. This is in contrast to the slower kinetics caused by larger anatase TiO₂ and the negligible reactivity observed for rutile TiO₂. These findings underscore the critical role of TiO2 phase and size in tailoring BaTiO3 nanoparticles for advanced dielectric applications, enabling precise control over particle size (60–80 nm) and crystallinity through precursor engineering.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Journal of Superconductivity and Novel Magnetism
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2018
·Vol. 32
·期 5
·1279-1284
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IF 1.142
Hu Hao,Niu Xiaofei
Magnetoplumbite-type (M-type) barium ferrites doped with different Y–Co doping content Ba 0.95 Y 0.05 Fe 12− x Co x O 19 ( x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5) were successfully prepared by ceramic process and investigated in this paper for the first time. X-ray diffraction were used to analyze the phase of the prepared sample. The scanning electron microscopy (SEM) was used to measure the morphology, and magnetic properties were measured by vibrating sample magnetometer (VSM). The results of XRD show that the single phase of M-type barium ferrites was obtained with the increase of Co content ( x ), but α -Fe 2 O 3 occurred when x exceeds 0.3. The SEM results exhibit the uniform plane hexagonal structures of M-type ferrites with all range of Co doping content. VSM results display that magnetization ( M s ) and coercivity ( H c ) show the same tendency that their values first increase and then decrease with the increase of Co content.
研究领域:
材料科学
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磁性材料
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无机功能材料
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2019
·
IF 2.12
Peng Ren,Yun Yang,Shilie Pan
The new oxychloride, Ba 27 Pb 8 O 8 Cl 54 , has been synthesized by a high temperature solution method. It crystallizes as cubic brown block with unit-cell a = 22.547(2), space group Fm 3 ¯ m (No. 225). It features a complicated three-dimensional network composed of [Ba 20 O 4 Cl 92 ] and [Ba 14 O 8 Cl 36 ] units sharing one Ba atom and its coordination atoms, which is inserted by new isolated [Pb 4 O 4 ] clusters. The UV–Vis-IR diffuse reflectance spectrum exhibits that its optical band gap is about 3.9 eV. In this paper, the structural features, thermal behaviors and optical properties were systemically studied.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 15
·12771-12776
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IF 2.324
Qing Zhenjun,Ji Zhenguo
The effects of barium ions non-stoichiometry on the phase composition, microstructure, and microwave properties of Ba 1+x Co 2 V 2 O 8 (x = 0–0.5) ceramics were studied. XRD results show that the single phase of BaCo 2 V 2 O 8 was found in the composition of x equal to zero while a secondary phase of Ba 2 V 2 O 7 started to precipitate at 0.5 ≥ x ≥ 0.2, as confirmed by SEM and EDX. The appearance of Ba 2 V 2 O 7 phase with higher sintering temperature is the main reason of the increase of the optimum sintering temperature of the system. The comparisons between theoretical and experimental values of microwave dielectric properties indicate that the appearance of second phase (Ba 2 V 2 O 7 ) leads to the decrease of dielectric constant and the improvement of the temperature coefficient of frequency and the quality factor values. Ba 1.5 Co 2 V 2 O 8 ceramic sintered at 925 °C showed good properties: ε r = 11.5, Q × f = 47,230 GHz and τ f = − 32.1 ppm/°C.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Guoqiang Luo,Ganrong Zhang,Luo Bai,Ying Zhang,Yuxin Fan,Yuzhe Han,Xiaoping Guo,Meijuan Li,Rong Tu,Qiang Shen
Tetragonal BaTiO 3 (BT) powder with appropriate size and dispersity is essential for the dielectric layers in multilayer ceramic capacitor technology. In this work, high tetragonality BT powder with controllable dispersion, and particle size was synthesized using combined dispersants and a two-step hydrothermal method . Owing to the synergistic effect of chemical bond force and electrostatic adsorption force between cetyltrimethylammonium bromide (CTAB) and polyvinyl-pyrrolidone (PVP) composite dispersants at a high temperature, the ultrafine BT powder with a high c/a of 1.0090, small size of 236 ± 15 nm and low polydispersity index of 0.336 was achieved. This idea shows great significance for the synthesis of BT powder with high tetragonal, high dispersion, and small particle sizes.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 6
·4232-4241
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IF 3.5
Xiaoxin Chen,Hailan Qin,Hongtian Li,Yuxiao Du,Shenghao Wang,Peifeng Li,Yongming Hu,Laijun Liu,Jianwei Zhao,Dawei Wang
In many studies, the properties of BiFeO 3 –BaTiO 3 (BF–BT) ceramics vary greatly using different raw reagents, which makes it challenging to obtain reliable and repeatable properties of BF–BT-based devices. In this work, 0.7BiFeO 3 –0.3BaTiO 3 (0.7BF–0.3BT) ceramics were fabricated by a conventional solid-phase synthesis using TiO 2 reagents with varied purities of 98%, 99%, 99.9%, and 99.99%, respectively. The phase structure, microstructure, ferroelectric, and piezoelectric properties were comprehensively studied. All compositions of the ceramics exhibit a pseudo-cubic phase perovskite structure, and the fraction of the rhombohedral phase increases with increasing the TiO 2 purity. Additionally, backscattered electron images and energy-dispersive spectroscopy revealed an obvious core–shell structure within grains. In particular, the 0.7BF–0.3BT ceramics prepared with 98% purity TiO 2 exhibited superior ferroelectric and piezoelectric properties, d 33 ∼ 220 pC/N and d 33 ∗ $d_{{\mathrm{33}}}^{\;*}$ ∼ 230 pm/V. The ceramics prepared with higher purity TiO 2 suffered from severe leakage conduction, which can be well addressed by adding excess TiO 2 . Our work reveals the importance of different grades of purity TiO 2 on the electrical properties of BF–BT ceramics.
研究领域:
材料科学
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物理学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2025
·
IF 6
Xue-lin Dong,Jun-han Liu,Zheng-xun Jia,Shao-zhan Tang,Shuo-yun Tong,Yu-xiang Xiong,Lei Ouyang
Background The quantification of rare earth elements (REEs) in barite-associated geological samples is complicated by persistent matrix effects from coexisting elements and overlapping mass spectral interferences. These analytical challenges are particularly pronounced in samples containing high concentrations of light REEs (LREEs), which induce spectral overlaps on heavy REEs (HREEs) during inductively coupled plasma mass spectrometry (ICP-MS) measurements. Results A two-stage precipitation protocol achieved separation efficiencies exceeding 93.0 % for nine matrix elements (Ba, Na, Sr, etc.), while subsequent 717-type anionic resin chromatography enabled group separation of REEs. Sequential elution with methanol-nitric acid (3.40 mol/L, 7:3 v/v) and 0.20 mol/L nitric acid solutions yielded distinct recovery profiles: HREEs (Eu–Lu) showed >90.0 % recovery in the first elution phase, followed by quantitative isolation of LREEs (La, Ce, Pr) in the second phase. The method was verified by using certified reference materials (GBW07892, GBW07893), and the determination results were consistent with the certified values. The application to three natural barite-associated REE ores was also realized. Significance This methodology resolves critical limitations in REE analysis through matrix element elimination and controlled LREE/HREE fractionation. The demonstrated 90.2–106.9 % recovery range across all REEs confirms operational robustness, while successful implementation in certified materials and field samples establishes reliability for geochemical characterization. The elution sequence optimization provides a template for analyzing REEs in barite-associated ores.
研究领域:
地球化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Chaofeng Wang,Shuilin Wu,Congyang Mao,Liguo Jin,Hanpeng Liu,Yufeng Zheng,Chunyong Liang,Shengli Zhu,Zhaoyang Li,Hui Jiang,Xiangmei Liu
Sonodynamic therapy (SDT) is recognized as an effective method for treating deep tissue bacterial infections, but enhancing charge transfer to achieve efficient SDT remains a formidable challenge. Here, deficient TiO 2 (DTO) is fabricated and Barium titanate (BTO) heterojunction with oxygen vacancies (OVs) and abundant Ti 3+ species on a Ti substrate. The OVs in DTO not only narrow the band gap of TiO 2 but also expedite the transfer of surrounding electrons to Ti 3+ . Meanwhile, the spin-polarization effect induced by the unpaired spin electrons in Ti atoms can expedite the transfer of ultrasonic piezoelectric charges in BTO, enhancing surface sonocatalytic efficiency. Consequently, the DTO/BTO with US irradiation can eradicate 99.82% of Staphylococcus aureus and inhibit biofilm formation. Additionally, the microcurrent generated by ultrasound-excited DTO/BTO enhanced mitochondrial fusion and promoted osteoblastic differentiation. The successful application of this ultrasound-mediated DTO/BTO in treating bone infection defects offers an effective antibiotic-free therapeutic strategy for deep-seated infections.
研究领域:
生物医学工程
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材料科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
SCRIPTA MATERIALIA
·
2020
·
IF 5.079
Ke Ren,Sisi Huang,Yejie Cao,Gang Shao,Yiguang Wang
Herein, we report the densification behavior of a typical electric ceramic, barium titanate (BaTiO 3 ), and highlight the role of oxygen vacancies in rapid densification of BaTiO 3 during flash sintering. The activation energies of flash- and conventional-densification processes are compared to reveal that the initiation of flash sintering is triggered by the accumulation of generated oxygen vacancies under the electric field. Furthermore, the densification kinetics of BaTiO 3 and X-ray photoelectron spectroscopy of flash-sintered BaTiO 3 infer that the ultrafast densification during the flash-sintering stage is dominated by the migration of electric field-generated defects coupled with defect-annihilation by take-in oxygen from the environment.
研究领域:
材料科学
·
陶瓷工程
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DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 3
·418
·
IF 3.164
Shuning Liu,Chenchen Liu,Changyu Liu,Ling Tu,Yong You,Renbo Wei,Xiaobo Liu
Barium titanate (BT) and polyarylene ether nitrile (PEN) nanocomposites with enhanced dielectric properties were obtained by using carboxylatedzinc phthalocyanine (ZnPc-COOH) buffer as the plasticizer. Carboxylated zinc phthalocyanine, prepared through hydrolyzing ZnPc in NaOH solution, reacted with the hydroxyl groups on the peripheral of hydrogen peroxide treated BT (BT-OH) yielding core-shell structured BT@ZnPc. Thermogravimetric analysis (TGA), transmission electron microscopy (TEM), TEM energy dispersive spectrometer mapping, scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) demonstrated successful preparation of BT@ZnPc. The fabricated BT@ZnPc was incorporated into the PEN matrix through the solution casting method. Rheological measurements demonstrated that the ZnPc-COOH buffer can improve the compatibility between BT and PEN effectively. With the existence of the ZnPc-COOH buffer, the prepared BT@ZnPc/PEN nanocomposites exhibit a high dielectric constant of 5.94 and low dielectric loss (0.016 at 1000 Hz). BT@ZnPc/PEN dielectric composite films can be easily prepared, presenting great application prospects in the field of organic film capacitors.Keywords:barium titanate;polyarylene ether nitrile;zinc phthalocyanine;dielectrics;rheology
研究领域:
材料科学
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电气工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2017
·Vol. 100
·期 10
·4491-4499
·
IF 2.841
Kangkang Yuan,Zhichao Yu,Chonghe Xu,Cong Feng,Xinzhu Gan,Xinqiang Wang,Luyi Zhu,Guanghui Zhang,Dong Xu
Acetic acid, lactic acid, and trifluoroacetic acid were used as complex agents for the preparation of dense barium zirconate fibers with electrospinning method. The formation of lactate when lactic acid was used as complex agent led to a mild decomposition process which was beneficial for the fabrication of dense barium zirconate fibers. High temperature stable intermediate phase of BaF 2 appeared when trifluoroacetic acid was used. The intermediate phase of BaF 2 was disadvantageous for pure and dense barium zirconate formation. While water vapor preheat treatment for BaF 2 contained fibers was an effective way for the fabrication of pure and dense barium zirconate fibers.
研究领域:
材料科学
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无机化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2021
·Vol. 130
·期 14
·
IF 2.546
Peng Xiao-Yan,Tang Yu-Cheng,Zhang Bo-Ping,Zhu Li-Feng,Xun Bo-Wei,Yu Jing-Ru
BiFeO 3 -BaTiO 3 is a promising high-temperature lead-free piezo-ceramics due to its high Curie temperature ( T C > 500 °C) and excellent piezoelectric properties. However, a high leakage current was often detected in this system, which severely affects its applications. In this work, the 0.7BiFe (1− x ) Ga x O 3 -0.3BaTiO 3 (BFGa x -BT, 0.00 ≤ x ≤ 0.10) system was designed to reveal the reason of leakage-current density decreased by their leakage mechanism. Because of the suppression of generation of Fe 2+ and oxygen vacancy ( V O ∙ ∙ ), the leakage mechanism from space charge limited conduction mechanism found in Ga-free BF-BT ceramics turns into Ohmic conduction and Schottky emission mechanism as Fe 3+ was replaced with Ga 3+ . A good combination of piezoelectric properties ( d 33 = 174 pC N −1 and k p = 29%) and high Curie temperature ( T C = 497 °C) was achieved in the BFGa0.06-BT ceramic owning the lowest leakage-current density. This work will provide the clues for preparing the high insulation and high piezoelectric performance BF-BT-based ceramics by suppressing the valence change of Fe 3+ and V O ∙ ∙ appearance.
研究领域:
材料科学
·
无机化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）