Article
Engineering, Electrical & Electronic
Saisai Chang, Chao Chen, Li Yang, Xiangping Jiang, Fen Ye, Jinyu Chen
Summary: Lead-free BiFeO3-BaTiO3 ceramics with excellent electrical properties were prepared by chemical doping and quenching process. The influences of Li/Al substitution on the structure, defects, and electrical properties of BF-BT-xLiAl were studied. The increase in the DC conductivity activation energy indicates a decrease in the oxygen vacancy concentration after Li/Al substitution, which was confirmed via XPS measurements. The enhanced piezoelectric constant (d(33) = 198 pC/N) and remanent polarisation (P-r=46.71 mu C/cm(2)) were obtained when x = 0.5.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Changbai Long, Wenjie Zhou, Huiming Song, Kun Zheng, Wei Ren, Haijun Wu, Xiangdong Ding, Laijun Liu
Summary: To meet the growing demand in pulsed power systems, it is urgent to explore advanced and eco-friendly energy storage capacitors based on lead-free relaxor ferroelectric ceramics. A novel strategy is proposed in this study to enhance the energy storage properties by creating highly dynamic PNRs and intrinsic conduction. The designed ceramics exhibit dramatically improved energy storage density, efficiency, and stability, providing a promising approach for exploring advanced energy storage capacitors in other lead-free ceramic systems.
Article
Physics, Condensed Matter
Peng Gu, Yan Zhou
Summary: This study investigated the effects of annealing atmospheres on the phase structure, microstructure, and dielectric properties of 0.68 Pb(Mg1/3Nb2/3)O3-0.32PbTiO3 ceramics. The results showed that annealing in O2 atmosphere resulted in a pure perovskite structure and higher density, while annealing in N2 or air condition led to the appearance of a second pyrochlore phase and porosity. Additionally, the dielectric properties of the ceramics were found to be highly sensitive to the annealing atmosphere.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Ceramics
Renfen Zeng, Fen Ye, Xiangping Jiang, Chao Chen, Xiaokun Huang, Xin Nie
Summary: The microstructure and properties of Ce-doped BTTW-BITT ceramics were analyzed, and it was found that an appropriate amount of Ce ion doping could improve the performance, enhance the piezoelectric activity, and improve the thermal stability.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Dongxia Tian, Pan Chen, Xu Yang, Baojin Chu
Summary: The study demonstrates a scaling effect in BaTiO3 and Ba0.83Sr0.17TiO3 ceramics with sub-millimeter thickness, showing reduced dielectric constant, increased coercive field, and decreased piezoelectric response. This effect is possibly due to surface layers with a stabilized ferroelectric phase and higher coercive field.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Jiangtao Wu, Huaicheng Xiang, Yun Sun, Alin Cao, Liang Fang
Summary: Fluorite-structured Ce1-xYxO1-x/2 ceramics were prepared by solid-phase reaction method. XRD analysis shows that the maximum solid solubility of Y3+ in CeO2 is less than 60%. With the increase of x, the dielectric constant and temperature coefficient decrease, while the Q x f value reaches its maximum at x=0.3. The presence of Ce3+ and the rattling effect of Ce4+ are the reasons for the higher dielectric constant compared to single material CeO2.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Weihua Cai, Xinyu Ma, Jin Chen, Ruochen Shi, Yabo Wang, Yawei Yang, Dengwei Jing, Hudie Yuan, Jing Du, Meidan Que
Summary: Efforts have been made to develop efficient visible-light-driven photocatalysts for CO2 conversion. Wheat-heading BaTiO3 with high surface area and piezoelectricity, along with oxygen vacancies, was used to enhance the photocatalytic performance of CO2.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yun Zhang, Xi Jiang, Xinrui Guo, Shihua Ding, Tianxiu Song
Summary: The effects of Li+ heterovalent substitution for Mg2+ in Mg1-xLixZrTa2O8-x/2 (x = 0-0.07) ceramics were investigated. The site occupancy and existence of Li+ were examined using VASP and XPS. Single phase solid solution with wolframite structure was identified. Li+ substitution reduced the densification temperature and significantly increased the Qxf. The dielectric constant er decreased due to ionic polarizability. The variations in resonant frequency temperature coefficient Tf were explained by oxygen octahedral distortion and bond energy. Li substitution was effective and inexpensive for enhancing dielectric properties and optimizing densification temperature in MgZrTa2O8 ceramics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Qifeng Quan, Huiqing Fan, Qi Shen, Yuxin Jia, Han Wang, Ao Zhang, Dingwei Hou, Weijia Wang, Qiang Li
Summary: In this study, a very promising electrostrictive material is obtained by doping barium zirconate into a sodium potassium niobate matrix. The material shows high electrostrain, ultra-low hysteresis, and excellent stability.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Xuewen Jiang, Hua Hao, Jianjun Zhou, Jiahao Lv, Zichen He, Minghe Cao, Zhonghua Yao, Hanxing Liu
Summary: In this study, a new 0.9BT-0.1BMZ dielectric ceramic was synthesized using the sol-gel method, and controlling the particle size led to an improvement in energy storage density. The enhanced grain boundary effect significantly improved the energy storage performance, as demonstrated by the comprehensive analysis of electric field distributions, breakdown paths, and impedance spectra.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Youness El Issmaeli, Amina Lahrichi, Erman Eloge Nzaba Madila, Taj-dine Lamcharfi, Farid Abdi, Adam Duong
Summary: In this study, CaCu(3)Ti(4-x)ZrxO(12) compounds with different Zr doping concentrations were successfully synthesized using the SSR method, and their crystalline structures, microstructures, optical, dielectric, and electrical properties were analyzed in detail. The results showed that Zr doping significantly reduced the grain size of the CCTZO ceramics. All CCTZO samples exhibited an energy gap of approximately 2.08 eV and a relatively high dielectric permittivity. XPS analysis confirmed the presence of Ti3+ and Cu+ ions as well as oxygen vacancies, which greatly influenced the dielectric behavior of the materials.
SOLID STATE SCIENCES
(2022)
Article
Engineering, Environmental
Xiaoyan Dong, Xu Li, Xiuli Chen, Jiagang Wu, Huanfu Zhou
Summary: Lead-free dielectric ceramic capacitors have attracted attention for their exceptional dielectric and energy storage properties. By optimizing temperature and grain size, enhanced polarization and breakdown strength were achieved in BaTiO3-based ferroelectric ceramics, attributed to lattice distortion and improved insulation performance. Ultimately, this research may offer a practical and pioneering approach in developing high-performance dielectrics for energy storage applications.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Xiangcheng Qi, Pengrong Ren, Xiangqian Tong
Summary: This work proposes a novel synergistic modulation method to achieve balanced piezoelectric properties by combining heterovalent donor doping and oxygen-vacancy regulation. The results show that appropriate Ca ion doping can improve d33 and Qm of potassium sodium niobate (KNN) ceramics. Annealing the sample in N2 atmosphere further achieves a balanced electromechanical qualities and piezoelectric coefficient.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yu Chen, Huajiang Zhou, Qingyuan Wang, Jianguo Zhu
Summary: In this study, different amounts of Cr2O3 were doped into the Aurivillius-type compound Bi2.8Gd0.2TiNbO9 (BGTN) to synthesize Gd/Cr co-doped Bi3TiNbO9 ceramics with improved electrical properties. The dopant of Cr2O3 resulted in lattice distortion and grain refinement, and had an impact on the dielectric response and conductivity of the ceramics. Moderate Cr2O3 doping was found to enhance the piezoelectric properties and thermal stability of the ceramics.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Ceramics
Amir Khesro, Fawad Ahmad Khan, Raz Muhammad, Asif Ali, Majid Khan, Dawei Wang
Summary: Lead-free ceramics with single/mixed perovskite structure and relaxor behavior were successfully synthesized through a solid-state sintering route. The addition of Nd3+ significantly enhanced the breakdown strength and conversion efficiency.
CERAMICS INTERNATIONAL
(2022)
