JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 16
·21188-21196
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IF 2.478
Sun Ying,Liu Hongbo,Liu Fangchao,Liu Gang
Recently, it is shown that the thin films of BiFeO 3 –BaTiO 3 –SrTiO 3 have ultrahigh-energy storage density. However, the energy storage properties of BiFeO 3 –BaTiO 3 –SrTiO 3 ternary bulk ceramics have not been studied. In this work, the BiFeO 3 –BaTiO 3 –SrTiO 3 ceramics have been prepared by a conventional solid-state reaction method and the dielectric and electrical energy storage properties have been studied in detail. The ceramic with the composition of 0.25BiFeO 3 –0.30BaTiO 3 –0.45SrTiO 3 is experimental evidenced to be the best with the highest dielectric permittivity in the ternary system. To suppress the dielectric loss and leakage current, 0.25BiFeO 3 –0.30BaTiO 3 –0.45SrTiO 3 has been doped with Mn. Mn-doped ceramics have the same perovskite structure but the fine grains are formed and the number of pores decreases. Mn-doping reduces dielectric loss, enlarges the thermally stable zone of the dielectric, and improves the electrical energy storage density simultaneously. 2 mol% Mn-doped 0.25BiFeO 3 –0.30BaTiO 3 –0.45SrTiO 3 has the most optimized electrical energy storage properties. The energy storage density is 1.33 J/cm 3 and the efficiency is 88.5% at 185 kV/cm. The discharge energy density is 2.7 times that of undoped 0.25BiFeO 3 –0.30BaTiO 3 –0.45SrTiO 3 and 90% stored energy can release in 120 ns.
研究领域:
材料科学
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电介质物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2024
·Vol. 107
·期 10
·6833-6843
·
IF 3.5
Hailan Qin,Jianwei Zhao,Xiaoxin Chen,Hongtian Li,Shenghao Wang,Yuxiao Du,Ahmad Azmin Mohamad,Huanfu Zhou,Dawei Wang
The investigation of lead-free ceramics with exceptional piezoelectric properties holds great importance in the substitution of lead-based materials, hence promoting the development of green technology and fostering an environmentally sustainable society. This study successfully synthesized two series of Bi(Mg 2/3 Nb 1/3 )O 3 (BMN)-modified BiFeO 3 –BaTiO 3 (BF–BT) lead-free piezoelectric ceramics using the conventional solid-state reaction approach. The phase structure, microstructure, dielectric, and piezoelectric properties of these ceramics were comprehensively investigated. A typical perovskite structure is observed in all probed compositions, and the associated phase structure undergoes a gradual transition from a rhombohedral-cubic phase mixture to a cubic-dominant phase structure as increases the content of BMN and BT. All compositions exhibit obvious core–shell microstructures with inhomogeneous element distributions. Most importantly, the BF–0.30BT–0.005BMN and BF–0.34BT–0.03BMN piezoelectric ceramics presented remarkable values for the piezoelectric coefficient (225 pC/N) and converse piezoelectric coefficient (396 pm/V), respectively. These findings highlight the potential of BMN-modified BF–BT ceramics for use in high-performance piezoelectric applications.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
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
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物理学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Mohsin Ali Marwat,Habib Ullah,Muhammad Usman,Muhammad Ali Ehsan,Haibo Zhang,Muhammad Fawad Khan,Sher Ali,Muhammad Yousaf
Herein, motivated with narrow/wide-bandgap heterojunction materials as one of the perfect solutions, we separately synthesized BiFeO 3 (BFO) and SnO 2 nanoparticles ; then coupled them in various weight percentages to obtain nanocomposites with efficient contacts for visible light 2,4-DCP and RhB degradation and effectively reduced charge recombination. The material of interest, i.e., with six weight percentage coupling of SnO 2 (i.e., 6SO/94BFO), endorsed superior photoactivity for 2,4-DCP and RhB degradation. In addition, under the visible light irradiation, this photocatalyst degraded 87.2% of RhB and 65.1% of 2,4-DCP in 2h, which compared to pristine BiFeO 3 nanoparticles are about 2.6- and 2.7-times enhancements, respectively. The photoluminescence spectroscopy and mechanism model showed a substantial interface between BiFeO 3 and SnO 2 and unfeasible electron-holes recombination. The electrons and holes are entirely utilized to produce superoxides and •OH radicals, respectively, predicting enhanced visible-light photodegradation. Overall, this work offers novel narrow/wide-bandgap heterojunction nanocomposites as feasible aspirants for pollution control and effective visible light photodegradation of chlorinated compounds.
研究领域:
环境科学
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材料科学
✓ 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
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物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2024
·Vol. 107
·期 10
·6574-6582
·
IF 3.5
Weiping Gong,Duoduo Zhang,Lang Xiao,Jiahui Zhao,Ting Wang,Kai Li,Zhentin Zhao,Manuel Scharrer,Alexandra Navrotsky
The Aurivillius compounds in the Bi 2 O 3 –Fe 2 O 3 –TiO 2 system, combining ferroelectric, semiconducting, and ferromagnetic properties, have attracted particular interest. Formation kinetics and thermodynamic stability are the fundamental knowledge needed for modeling and predicting the temporal microstructure and property evolution during materials processing but have not yet been addressed by quantitative experimental measurement. This article focuses on the Bi n +1 Fe n –3 Ti 3 O 3 n +3 Aurivillius compounds on the Bi 4 Ti 3 O 12 –BiFeO 3 tie-line to elucidate the mechanisms and thermodynamic controls responsible for phase formation of compounds with various perovskite-like layers. Five high-purity Aurivillius compounds Bi 4 Ti 3 O 12 , Bi 5 FeTi 3 O 15 , Bi 6 Fe 2 Ti 3 O 18 , Bi 7 Fe 3 Ti 3 O 21 , and Bi 8 Fe 4 Ti 3 O 24 with integer n = 3–7 values were synthesized and their phase transformation properties and enthalpies of formation were studied by X-ray diffraction in situ, high temperature differential scanning calorimetry, and high temperature oxide melt solution calorimetry. Thermodynamic stability of the compounds decreases with increasing n , and formation kinetics gradually slow down, demonstrating the inherent difficulty to synthesize pure Aurivillius compounds with n larger than 8. This difficulty was confirmed by an impurity phase coexisting with Bi 9 Fe 5 Ti 3 O 27 .
研究领域:
材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Huiming Ji,Lu Zhang,Rui Zhang
In this study, multiferroic BiFeO 3 particles with size of ∼ 50 nm and good crystallinity were prepared via a simple sol–gel method and annealing. And the volatile organic compounds (VOCs) sensing properties of BiFeO 3 sensor were measured under both traditional thermal excitation and synergetic thermal-magnetic excitation. In particular, auxiliary magnetic field was first introduced into testing environment. The results shows that the optimum operating temperature of the sensor decreases 10℃ by introducing magnetic field, and the sensor shows three times faster response speed and diverse selectivity with best response to n -butanol under thermal excitation while butanone under thermal-magnetic excitation. In addition, the sensor has response value of 1.25 to 1 ppm n -butanol, indicating the possibility of detecting low concentration of toxic gases. The effect of magnetic field on multiferroic BiFeO 3 sensor can be divided into three aspects: decrease of defects on domain wall, excitation of testing gas molecules with asymmetry electron cloud distributions and activation of surface-absorbed oxygen species with unpaired electrons.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Zhuo Yu,Jiangtao Zeng,Liaoying Zheng,Anthony Rousseau,Guorong Li,Abdelhadi Kassiba
Lead-free BiFeO 3 –BaTiO 3 –Bi(Mg 2/3 Nb 1/3 )O 3 (BFBT-BMN) ceramics with different grain sizes were fabricated by using a conventional solid-state reaction. The high-energy ball milling technique was utilized to obtain the fine-grained ceramics. The grain size reduction lowers the remanent polarization ( P r ) and enhances the dielectric breakdown strength ( E b ) leading to a drastic increase of the recoverable energy storage density ( W re ). For the fine-grained BFBT-BMN ceramics, W re greatly increases by 8 times from 0.16 J/cm 3 to 1.27 J/cm 3 , compared to the coarse-grained BFBT-BMN ceramics. Transmission electron microscopy (TEM) and piezo-response force microscopy (PFM) measurements revealed the occurrence of the polar nanoregions (PNRs) in the fine-grained BFBT-BMN ceramics. The dynamic and weakly correlated PNRs structure is responsible for the enhancement of recoverable energy storage density in the fined-grained BFBT-BMN ceramics. This work indicates that the grain size reduction is an effective way to modify the energy storage properties of BiFeO 3 -based ferroelectric ceramics .
研究领域:
材料科学
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能源存储
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电子显微学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
·
IF 8.4
Xiaojie Li,Fanhao Jia,Na Luo,Haijie Cai,Jianguo Chen,Wei Ren,Jinrong Cheng,Jiaqiang Xu
Ferroelectric oxides with great polarization have attracted much attention due to the polarization modulated carrier behaviors causing high gas sensitivity in detecting hazardous toxic gases. In this work, tourmaline@BiFeO 3 (T@BFO) composites were fabricated by the sol-gel method based on the electrostatic self-assembly strategy for the C 3 H 6 O and H 2 S detection. It is found that BFO nanoparticles are uniformly distributed on tourmaline due to the strong electrostatic field of tourmaline. In comparison with pure BFO, the T@BFO composites showed an improved gas sensitivity. More importantly, the sensor based on 3.0-T@BFO can effectively detect C 3 H 6 O at 150 °C and H 2 S at 210 °C in limits of detection as low as 50 and 7 ppb, respectively. The results exhibit that 3.0-T@BFO composites have lower activation energies (E act ) of C 3 H 6 O at 150 °C and H 2 S at 210 °C, which endow 3.0-T@BFO with dual-selectivity for C 3 H 6 O and H 2 S. The Ex-situ XPS and density functional theory calculations further reveal that tourmaline activates the sensing site of BFO to achieve selective adsorption of C 3 H 6 O at Bi, Fe, and oxygen vacancies sites and H 2 S at surface lattice oxygens, Fe and oxygen vacancies sites. These results provide an efficient strategy to design practice multifunctional and highly sensitive gas sensors for detecting hazardous toxic gases.
研究领域:
材料科学
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传感器技术
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化学
✓ 已验证
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2018
·Vol. 12
·期 6
·1-10
·
IF 1.961
Mao Jie,Quan Xie,Wang Jing,Gao Cong,Chen Shuo,Yu Hongtao,Zhang Yaobin
Heterogeneous Fenton-like reaction has been extensively investigated to eliminate refractory organic contaminants in wastewater, but it usually shows low catalytic performance due to difficulty in reduction from Fe(III) to Fe(II). In this study, enhanced catalytic efficiency was obtained by employing Cu-doped BiFeO 3 as heterogeneous Fenton-like catalysts, which exhibited higher catalytic performance toward the activation of H 2 O 2 for phenol degradation than un-doped BiFeO 3 . BiFe 0.8 Cu 0.2 O 3 displayed the best performance, which yielded 91% removal of phenol (10 mg L –1 ) in 120 min. The pseudo first-order kinetic rate constant of phenol degradation in BiFe 0.8 Cu 0.2 O 3 catalyzed heterogeneous Fenton-like reaction was 5 times higher than those of traditional heterogeneous Fenton-like catalysts, such as Fe 3 O 4 and goethite. The phenol degradation efficiency could still reach 83% after 4 cycles, which implied the good stability of BiFe 0.8 Cu 0.2 O 3 . The high catalytic activity of BiFe 0.8 Cu 0.2 O 3 was attributed to the fact that the doping Cu into BiFeO 3 could promote the generation of Fe(II) in the catalyst and then facilitate the activation of H 2 O 2 to degrade the organic pollutants.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2012
·
IF 2.105
Lei Wang,Jin-Bao Xu,Bo Gao,Ai-Min Chang,Jing Chen,Liang Bian,Chun-Yan Song
BiFeO 3 nanoparticles were synthesized through low-heating temperature solid-state precursor method. Solid-state Bi(NO 3 ) 3 ·5H 2 O, Fe(NO 3 ) 3 ·9H 2 O and NaOH experience a chemistry reaction at room temperature, forming a nanometer-sized precursor, which is conducive to lowering the crystallization temperature of BiFeO 3 . Perovskite-type BiFeO 3 forms at a much lower crystallization temperature at 425 °C without addition of organic agent. This method can greatly reduce the energy consumption and prevent Bi volatilization. The product was characterized by a variety of techniques such as TGA–DSC, XRD, SEM, FT-IR, VSM and UV–vis spectroscopy. The particle morphology changes from an average length of 80–100 to 400–500 nm as the annealing temperature increases from 450 to 600 °C. BiFeO 3 prepared by this method can be an appropriate visible-light photovoltaic and photocatalytic material due to its strong absorption band in the visible region and smaller band gap (∼2.06 eV, BiFeO 3 prepared at 600 °C).
研究领域:
材料科学
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化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 3
·1688-1699
·
IF 1.8
Xiangtai Guo,Yu Sun,Liangliang Liu,Zilong Yu,Juan Liu
BiFeO 3 -BaTiO 3 -based ceramics are promising multiferroic materials for a wide range of applications. In this paper, the effects of different ionic valence state((Ga 0.5 Ta 0.5 ) 4+ , Ta 5+ ) doping on the structure and properties of 0.73BiFeO 3 -0.27BaTi 1- y (Ga 1- x Ta x ) y O 3 ceramics were investigated. X-ray diffraction analysis showed that all samples were determined by rhombohedral R3c phase and tetragonal P4mm phase. A frequency-independent dielectric anomaly with obvious thermal hysteresis was detected in all samples, indicating the first-order ferroelectric phase transition, and the Curie temperatures were all above 600°C. The ferroelectric analysis found that the doping of donor element Ta reduced the coercive field, with a slight decrease of remanent polarization, which can be attributed to the soft effect of Ta element. Meanwhile, the magnetic properties were enhanced for all samples, with a maximum in 15T ( x = 1, y = .015) sample, where M r = .13 emu/g. According to relevant analysis, high-valence element substitution can enhance the magnetic properties and reduce the coercive field of BiFeO 3 , while low-valence element substitution can reduce dielectric loss. This result points out a way for us to choose appropriate doping elements to improve the performance of BiFeO 3 ceramics.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）