Journal of Materiomics
·
2024
·
IF 8.4
Xiaoxiao Zhou,Yuxin Xu,Xiaoqi Gao,Chengchao Hu,Wan Jiang,Hezhang Li,Bo-Ping Zhang
BiFeO 3 –BaTiO 3 (BF–BT) ceramics exhibit higher piezoelectric coefficients ( d 33 ), Curie temperatures ( T C ), and temperature stability than other high-temperature lead-free piezoelectric materials. However, despite their crucial role in piezoelectric devices, the mechanical properties of BF–BT ceramics have been underexplored. A thorough evaluation of the mechanical properties of BF–BT is crucial for developing cost-effective and durable lead-free piezoelectric ceramics. Moreover, the specific causes of the high piezoelectric response and excellent temperature stability of BF–BT ceramics remain unclear owing to the instrumental detection threshold, which limits experimental studies to temperatures above 140 °C and below the degradation temperature of d 33 . To investigate the intrinsic origins of the high piezoelectricity and temperature stability of BF– x BT ceramics and to enhance their mechanical properties, a two-step sintering process is used to fabricate these ceramics (0.25 ≤ x ≤ 0.40). Owing to improvements in grain refinement and reduced Bi 3+ volatilization, the BF–0.33BT ceramic exhibits enhanced overall performance, with a modified small punch strength of 155 MPa, Vickers hardness of 5.2 GPa, a d 33 of 220 pC/N at room temperature, T C of 466 °C, and d 33 values exceeding 400 pC/N at 260 °C. Phase-field simulations, which address the limitations of device detection thresholds, reveal that with increasing temperature, the domain structure relaxes, and polarization intensity decreases. This indicates that changes in the high-temperature piezoelectric properties can be attributed to domain structure relaxation and the increase in dielectric constant. Overall, BF–BT ceramics exhibit superior piezoelectric performance, mechanical properties, and temperature stability, making them highly suitable for use in high-temperature and demanding environments.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Xue Yang,Yi Pu,Yifei Zhang,Xiaofang Liu,Jianxin Li,Ding Yuan,Xin Ning
In this study, a new barium titanate@polyurethane/polysulfonamide (BaTiO 3 @PU/PSA) composite nanofibrous membrane with comprehensive properties for high temperature filtration and robust PM2.5 removal was successfully fabricated through the blending spinning of PU and PSA and the introduction of BaTiO 3 . As a consequence, the BaTiO 3 @PU/PSA membrane achieved the high capture efficiency of 99.99 % for fine particulates, low pressure drop of 39.4 ± 0.2 Pa, good mechanical property (13.27 MPa), sufficient flexibility, high thermal stability (up to 300 °C), favorable flame-retardancy as well as superior chemical resistance against acid and alkali. Especially, to intuitively reveal the relationship between the fiber structure, high temperature environment, gas velocity and filtration performance of the composite membrane, the filtration processes were carefully investigated through the analog simulation. More importantly, the BaTiO 3 @PU/PSA membrane exhibited high-efficiency PM2.5 purification capacity, and the removal efficiency kept stable after high temperature, acid or alkali treatment, ascribing to the advantageous structure of PSA, PU and BaTiO 3 . Overall, the BaTiO 3 @PU/PSA nanofiber membranes with versatility are a promising high-efficiency candidate for dust removal, particularly in harsh conditions.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2013
·
IF 3.328
Xinzhou Wu,Zheng Chen,Zheng Cui
Albumen and BaTiO 3 nanoparticles are employed to make solution processable nanocomposite for high permittivity films. The nanoparticles are modified with poly(acrylic acid) molecules to achieve homogeneous dispersion in albumen aqueous solution and made into films by drop casting. The dielectric constant and loss tangent of albumen–BaTiO 3 nanocomposites are investigated as the function of volume fraction of BaTiO 3 . The nanocomposites exhibit maximum relative permittivity of 52 and good dielectric stability over a wide range of frequency, while the loss tangent is below 0.05 even at high BaTiO 3 loading of 80 vol%. The dielectric constants of nanocomposites with lower volume fractions (<41 vol%) are in good agreement with the Lichtenecker-Logarithmic model.
研究领域:
材料科学
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 11
·3839-3850
·
IF 8.8
Zhou Xiao-Xiao,Tang Yu-Cheng,Li He-Zhang,Hao Yi-Jin,Xue Meng-Ping,Pei Jun,Peng Xiao-Yan,Zhang Bo-Ping
BiFeO 3 –BaTiO 3 (BF–BT) lead-free piezoelectric ceramics have high piezoelectricity and high Curie temperature ( T C ), but the mixed-valence Fe ions and Bi 3+ volatilization would promote the formation of Bi 25 FeO 40 /Bi 2 Fe 4 O 9 and oxygen vacancy, which greatly degrade the insulation properties required for polarization. In this study, it was found that the modification of BiAlO 3 (BA) in BF–BT ceramics could effectively solve these problems, reducing the leakage current to 1 × 10 −9 A·cm −2 and transiting the space charge-limited conduction to ohmic conduction. Because of the enhanced insulation properties and appropriate rhombohedral-pseudocubic phase ratio ( C R / C PC ), BF–BT– x BA ceramics in an optimized composition obtain enhanced piezoelectric performance: piezoelectric charge coefficient ( d 33 ) = 196 pC·N −1 , planar electromechanical coupling coefficient ( k p ) = 31.1%, T C = 487 °C and depolarization temperature ( T d ) = 250 °C; unipolar strain ( S uni ) = 0.17% and piezoelectric strain coefficient ( d 33 * ) = 335 pm·V −1 at 100 °C. Especially, d 33 exceeds 283 pC·N −1 at 233 °C and d 33 * is 335 pm·V −1 at 100 °C, showing an excellent high-temperature piezoelectricity and high depolarization temperature. The results are attributed to the domain structure of rhombohedral-pseudocubic phase coexistence and its high-temperature switching behavior. This work provides a feasible and effective approach to improve the high temperature piezoelectric properties of BF–BT– x BA ceramics, making them more suitable for high temperature applications. Graphical abstract
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Rong Han,Wenbao Huang,Bihan Sun,Houfen Li,Rui Li,Sufang Wang,Aijuan Zhou,Xiuping Yue,Cong Gao,Hongtao Yu,Xu Zhao
This study innovatively constructed a polarized ferroelectric BaTiO 3 /CuFe 2 O 4 Z-scheme heterojunction to synergistically enhance quinoline degradation in a persulfate (PS)/photocatalytic system. Comprehensive characterization through ferroelectric analysis and piezoresponse force microscopy (PFM) confirmed the formation of interfacial polarization field in this composite. The polarized VIS/PS/BaTiO 3 /CuFe 2 O 4 * system achieved 99.65 % quinoline removal with excellent cycling stability, outperforming its unpolarized counterpart (83.64 % for VIS/PS/BaTiO 3 /CuFe 2 O 4 ). Mechanistic investigations combined with DFT calculations revealed that the ferroelectric polarization field promoted the directional migration of photogenerated charge carriers through Z-schematic pathway, thereby enhancing charge carrier separation, and it also led to polarized surface sites which improved PS adsorption and activation. The dual enhancement mechanism generated abundant reactive species for efficient quinoline degradation, with intermediate product analysis further clarifying the reaction pathways. This work demonstrates the effectiveness of ferroelectric polarization engineering in optimizing PS-photocatalysis systems, and provides a design strategy for other integrated advanced oxidation technologies in water purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 11
·7124-7131
·
IF 2.1
Wang Minmin,Zhao Wenwu,Shi Xu,Sun Tongming,Ju Jianfeng,Tang Yanfeng
In recent years, self-power sensing systems based on triboelectric nanogenerators (TENGs) have been extensively studied. However, pure polymer friction materials are not satisfactory in terms of their triboelectric properties and cannot meet the needs of high-performance TENGs. We have improved the performance of a polymer electrode-based TENG by increasing the specific surface area of the material as well as the dielectric constant of the triboelectric layer. Benefitting from the enhanced dielectric constant engineering and high surface area engineering, the BaTiO 3 @CMC-based TENG exhibits excellent output performance which is 3 times higher than that of a pure CMC-based TENG. As expected, the obtained self-powered TENG can be used to monitor the wind speed with a high sensitivity of 1.97 V/(m s −1 ). In addition, the obtained sensor system can accurately map the contact position and touch trajectory of the object when assembling the TENG with a 4 × 4 array on an acrylic substrate. This work will provide basic insights into improving the performance of TENGs and widen their applications in the field of sensing.
研究领域:
材料科学
·
传感器技术
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2018
·
IF 0
Baowei Wang,Shumei Yao,Yeping Peng,Yan Xu
Non-thermal plasma (NTP) combined with catalysts has been regarded as a promising approach for the removal of VOCs. In the present work, a series of TiO 2 -BaTiO 3 catalysts were prepared by simple mechanical mixing. The performance of the catalysts on degradation of high concentration of toluene was investigated in a dielectric barrier discharge (DBD) plasma system . The effects of input power, mass ratio of Ti/Ba, gas flow rate and the initial concentration of toluene on the removal of toluene and the selectivity of CO 2 as well as the energy yield have been investigated. The toluene removal efficiency and CO 2 selectivity increased obviously in the plasma-catalytic system compared with the single NTP system. The removal efficiency of toluene with different catalysts abided by the following rules: Ti1Ba1 > Ti2Ba1 > Ti1Ba2 > BaTiO 3 > TiO 2 . The reason for the best performance of Ti1Ba1 is that TiO 2 offered the providential number of electron-hole pairs while BaTiO 3 supplied the fitting number of high energy electrons . Additionally, the synergistic effects between TiO 2 and BaTiO 3 also reached its maximum in this case. The concentration of O 3 in the exhaust gas was also detected and it reached the lowest point when Ti1Ba1 catalyst was packed in the discharge chamber.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
HIGH PERFORMANCE POLYMERS
·
2021
·
IF 2.161
Guangyu Duan,Fengying Hu,Zhongyuan Xin,Changlong Chi,Xiang Yu
This study reports that a novel high-temperature poly (m-phenyleneisophthalamide) (PMIA) composite with enhanced dielectric constant and thermal conductivity was prepared by filling with BaTiO3 nanowires–carbon nanotubes (BTCNs) fillers. Due to effective functionalization of BaTiO3 nanowires (BTNWs) and multi-wall carbon nanotubes (MWCNTs), the fabricated BTCNs fillers were homogeneously dispersed in PMIA matrix. The consequence displays that the dielectric constant of PMIA composite with 15 wt % BTNWs fillers increases to 27.6 at 103 Hz, which is about nine times higher than that of pure PMIA. Moreover, owing to the high thermal conductivity of MWCNTs, the thermal conductivity of PMIA with 15 wt% BTNWs fillers increases to 1.01 W/(mK). The enhanced thermal conductivity is beneficial for BTCNs/PMIA composite to dissipate the generated heat by dielectric loss. Considering these merits, this research would provide new methods and ideas for preparation of high-temperature dielectric polymer composites and reducing the internal thermal effect.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Hongye Wang,Rui Huang,Cheng Tao,Hua Hao,Zhonghua Yao,Hanxing Liu,Minghe Cao
Dielectric capacitor with high energy storage density has become a pivotally enabling technology in electronic industry. The most critical factors affecting energy storage capacity are polarization and breakdown strength . Here the BaTiO 3 @ NiO double-hysteresis-loop ceramics with different polarization characteristics are prepared by changing the sintering atmosphere to control the defect structure . Results show that, the samples sintered in oxygen exhibit the obviously characteristics of double hysteresis loop, higher polarization and larger breakdown strength . In contrast, the samples sintered in nitrogen have lower polarization and breakdown strength and weaker double hysteresis loop. It is proved that the double hysteresis loop is caused by the defects of the inner layer and the outer layer by regulating the defect structure . Firstly, Low valence Ni ions replace Ti ions to form N i Ti '' − V o • • defect dipoles. These charged defect dipoles could be pinned the domain wall, and the existence of oxygen vacancies restricts the movement of the domain wall, making the material appeared a pinched hysteresis loop similar to the double hysteresis loop as observed in antiferroelectrics. Secondly, the local electric field generated by the depletion layer at the interface may also trigger a new polarization features in the material. This double hysteresis loop helps to improve the polarization and energy storage capacity of the material.Finally, the excellent energy storage density of the oxygen samples reaches up to 2.48 J cm −3 at 340 kV cm -1 with prominent cycle stability and temperature stability. This work provides a prospective method to fabricate material with high energy storage performance by the adjustment defect structure to control the polarization mechanism in the BaTiO 3 @1NiO ceramics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Xiuyun Zhang,Jingsen Yue,Yunyun Zhao,Zeqiang Yan,Guisheng Zhu,Laijun Liu,Huarui Xu,Aibing Yu
A novel tartaric acid co-precipitation process was firstly reported to prepare tetragonal BaTiO 3 nano-powder with barium chloride, titanium tetrachloride as raw materials and tartaric acid as precipitant agent. The as-obtained BaTiO 3 powder exhibited a small average particle size about 140 nm, which still held a high tetragonality (c/a ratio) of 1.0092, suggesting its promising applications in multilayer ceramic capacitors (MLCC). In addition, this synthetic method will be of general interest to people who focuses on synthesis technology of Ti-based multicomponent oxides nano-materials owing to its outstanding advantages, including mild reaction condition, facile synthetic processes and especially stabilization of (TiO) 2+ even in a high pH about 8.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Kailai Zhang,Xiaodong Sun,Haitang Wang,Yali Ma,Hongwei Huang,Tianyi Ma
Single component semiconductor materials with piezoelectric response can promote the activation of hydrogen ions (H + ) and the generation of hydrogen (H 2 ) under the action of mechanical force, but the high recombination rate of carriers is the major obstacle to strengthen piezocatalytic efficiency. Here, a groundbreaking Bi 2 MoO 6 -BaTiO 3 (BMO-BTO) Type-I heterojunction piezocatalyst is successfully fabricated through a solvothermal strategy, and applied for cocatalysts-free piezocatalytic H 2 production reaction. Under ultrasonic vibration, the H 2 production rate of BMO-0.1BTO heterojunction can reach up to nearly 152.57 µmol/g/h, which is approximately 9.33 and 4.47 times with respect to that of pristine BMO (16.36 µmol/g/h) and BTO (34.16 µmol/g/h) alone, respectively. Furthermore, BMO is also combined with other commonly used piezocatalysts to construct heterojunctions, and analogous marvelous piezocatalytic H 2 production performance was attained. The enhanced piezocatalytic H 2 production performance can be credited to the established built-in electric field (BIEF) in heterojunction extraordinarily suppressed the recombination rates of piezocarriers, rather than an increase in piezoelectricity, which is emphatically verified through a series of physics and chemical characterizations. This study presents an innovative paradigm for fabricating BMO-based heterojunction piezocatalyst to efficiently convert mechanical energy into chemical energy.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Lili Zhao,Yan Zhang,Fulei Wang,Shicong Hu,Xiaoning Wang,Baojin Ma,Hong Liu,Zhong Lin Wang,Yuanhua Sang
Conventional electrochemical polymerization is performed on electrodes driven by a direct current power source. It is impossible to realize an electrochemical polymerization reaction on the surfaces of individual nanocrystals in an aqueous system due to the difficulty of connecting all of the nanocrystals to a power source with wires or with the aid of microfabrication , especially in the environment of liquid. In this work, a micro pseudo-electrochemical polymerization reaction was proposed for in situ synthesis of polyaniline (PANI) on the surface of BaTiO 3 nanocubes to form BaTiO 3 @PANI core-shell nanocubes. The electric potential of the micro pseudo-electrochemical polymerization originates from the opposite spontaneous polarized charges on the surface of a pair of adjacent BaTiO 3 nanocubes, which form a micro-scale electrochemical cell in reaction solution. Based on the piezotronic effect of the BaTiO 3 nanocubes, ultrasonic excitation was introduced to renew the piezoelectric charges on the surfaces of the BaTiO 3 nanocubes, and enhance the polymerization reaction. The ferroelectric electric potential and piezotronic effect-induced micro pseudo-electrochemical reactions can also be used in other nanomaterials-based electrochemical applications, such as micro-electrochemical water splitting, micro-electrophotocatalysis, and ultrasonic therapy.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）