JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Chunli Diao,Hanxing Liu,Haiwu Zheng,Zhonghua Yao,Javed Iqbal,Minghe Cao,Hua Hao
Electrostatic dielectric energy storage capacitors have attracted much attention recently for their fast charging-discharging speed and high power density. Trilayered Ba 0.4 Sr 0.6 TiO 3 /BaTiO 3 /Ba 0.4 Sr 0.6 TiO 3 (BST/BT/BST) thin films were prepared by spin-coating technique. The sandwich-structured thin films showed high dielectric constant (ε r = 952) and low dielectric loss (tanδ = 0.034) at room temperature (10 kHz). Moreover, the dielectric constant of the thin films demonstrated good frequency stability within the measured frequency range and broad capacitance variation (20 °C–160 °C, ΔC/C 25°C <±10%). The electric-field dependence of dielectric response was investigated and the dielectric tunability was 13.3% at 100 kV/cm. Compared with pure BT thin films, the heterostructure exhibited enhanced electric breakdown strength and energy storage density. The recoverable energy storage density and efficiency of BST/BT/BST thin films were 14.69 J/cm 3 and 33.9% at 1.44 MV/cm, respectively. The results indicated that BST/BT/BST heterostructure films would be an alternative way to improve the energy storage density of dielectrics for applications.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Dashuang Fu,Fang He,Haiyi Tian,Jiahao Li,Jieming Zhang,Zheng Kang,Yunkai Wu,Xu Wang
The development of lead-free dielectric capacitors with high recoverable energy storage density and high energy storage efficiency is important for improving the overall performance of electronic and power systems. BaTiO 3 (BTO) is one of the most common ferroelectric materials and has attracted much attention for energy storage applications in the past decades due to its excellent dielectric and ferroelectric properties. However, high remnant polarization and low electrical breakdown strength of BTO limit its development in energy storage applications. Many efforts (e.g., elements doping, interface/heterostructure, etc.) have been made to improve the energy storage density of BTO thin films. In this paper, Ba 1-x Ni x TiO 3 thin films (x = 0, 0.02, 0.04, 0.06, 0.08; abbreviated as BN x T) were synthesized via sol-gel and spin-coated method. The effect of Ni doping on the structural, dielectric, ferroelectric and energy storage properties of BTO thin films has been studied. The results confirmed that with the increase of Ni doping, a second phase arises and the dielectric constant decreases. While appropriate Ni doping led to the improvement of the breakdown strength, further increase of Ni deteriorated the energy storage because of the high oxygen vacancy. Finally, optimized energy storage performance was obtained for BN 0.04 T thin film: dielectric constant of 401, dielectric loss of 0.002, recoverable energy density of 20.2 J/cm 3 and energy storage efficiency of 83.6% at 965 kV/cm. Meanwhile, the remnant and maximum polarization of the films were 0.06 μC/cm 2 and 50 μC/cm 2 , respectively. BN 0.04 T thin film has an excellent application prospect and is expected to appear as a component in the future composite energy storage film system.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Min Zhang,Chaoyong Deng
The evolution of the dynamic hysteresis with electrical field amplitude ( E ) and frequency ( f ) in the ferroelectric BaTiO 3 (BTO) single crystal films prepared by pulsed laser deposition (PLD) has been investigated systematically. A noticeable transition from the low-frequency behavior to the high-frequency one was confirmed by observing the obtained hysteresis loops and the change of the physical properties. In addition, the analysis of the theoretical model shows that the frequency dependence of domain motion is the cause of the dynamic hysteresis loop scaling behavior.
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
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2025
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IF 5.6
Saiwei Luan,Huizhan He,Lei Zhang,Jie Yu,Xiuhua Cao,Jingxi Wang,Zhenxiao Fu,Rong Sun
The use of environmentally friendly aqueous tape casting has emerged as a promising route for fabricating high-quality BaTiO 3 -based films, particularly for ultra-thin multilayer ceramic capacitors (MLCCs). In this study, a high-solids-content BaTiO 3 slurry was formulated using APC (a polycarboxylate ammonium salt) as the dispersant, WB4101 as the acrylic binder, and PL002 as the plasticizer. The resulting 9.50 μm green tape exhibited a high density (3.65 g/cm 3 ), tensile strength (7.65 MPa), and fracture strain (11%), indicating good mechanical integrity. BaTiO 3 -based MLCC chips prepared from this tape showed a room-temperature capacitance of ∼28.0 nF and a dielectric loss of 0.02. Comprehensive evaluations of temperature coefficient of capacitance (TCC), ferroelectric hysteresis, DC-bias-dependent dielectric behavior, and resistivity degradation under accelerated DC stress were conducted. Notably, the TCC satisfied the X7R specification (−55 °C to 125 °C, ΔC/C 25 °C ≤ ±15%), confirming excellent dielectric temperature stability. Ferroelectric hysteresis characteristics, DC-bias-dependent dielectric stability, and resistance to degradation collectively demonstrate the excellent electrical reliability of the material. These results demonstrate that the proposed aqueous tape casting system is effective for producing reliable, high-performance BaTiO 3 -based MLCCs and provides a practical pathway for future development of lead-free, eco-friendly capacitor technologies.
研究领域:
材料科学
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电气工程
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陶瓷材料
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环保技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
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IF 3.057
Chunli Diao,Hanxing Liu,Hua Hao,Minghe Cao,Zhonghua Yao,Haiwu Zheng
SrTiO 3 /BaTiO 3 (ST/BT) thin-film heterostructure was deposited on Pt/Ti/SiO 2 /Si(100) substrate by spin-coating. X-ray diffraction pattern shows that the heterostructure is a perovskite structure composed of ST and BT without any impurity peaks. The dielectric constant and loss of the heterostructure at 10 kHz are 704 and 0.024, respectively. The electric-field dependence of dielectric response was investigated and the tunability of the sample under 200 kV/cm applied field is 21.5%. Compared with pure ST thin film , the polarization-electric field loops of ST/BT heterostructure display high polarization and good symmetry, which could be attributed to the introduction of BT with high dielectric constant and inhibition of the potential pitfalls movement for high barrier at ST/BT interface. Moreover, the heterostructure demonstrates photoconductivity behavior with 405 nm light illumination. The results indicate that ST/BT heterostructure is a potential material in application as multifunctional photoelectric devices.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Jinxi Feng,Tiantian Zhang,Wen Yan,Jingxiang Sun,Shuanghong Tian,Zhili He,Ya Xiong
A new piezo-catalytic reactor (PCR) was constructed. It was used to investigate the piezocatalytic degradation of pollutants and simultaneous response of current. It was found that PCR with SnO 2 / t -BaTiO 3 /ITO film anode possessed a more favourable piezocatalytic degradation and piezo-current response than PCR with only ITO or t -BaTiO 3 /ITO film anode, individually. For HCOOH, the degradation rate, short circuit current (I sc ) and open-circuit voltage (V oc ) reached 77.8 mg·L -1 ·h −1 , 5.12 µA, and 0.65 V, respectively, under its optimal condition. Its anodic process predominantly involved the piezocatalytic oxidations of H 2 O to •OH and HCOOH to CO 2 , while the cathodic process was mainly related to the reduction of O 2 to •O 2 – or H 2 O 2 and reduction of H + ion to H 2 . Although these processes were depended on the energy band structure of t -BaTiO 3 and redox potential of cathodic reactions, they were all initiated by the piezoelectric effect of t -BaTiO 3 , which drove the separation of intrinsic free carries to generate oxidative holes and reductive electrons. These investigation results and findings not only deepened the understanding of its piezo-current response, but also possibly extended the application of piezocatalysis to fuel cell.
研究领域:
环境科学
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材料科学
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催化
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电化学
✓ 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）