Article
Chemistry, Physical
Jyoti Rani, Varun K. Kushwaha, Piyush K. Patel, C. Tomy
Summary: The lead-free (BZT-0.5BCT)/CFO/(BZT-0.5BCT) trilayer thin film with strong ME coupling at room temperature exhibited excellent dielectric and magnetoelectric properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ahmed Gadelmawla, David Dobesh, Udo Eckstein, Oliver Gruebl, Matthias Ehmke, Maria Rita Cicconi, Neamul H. Khansur, Dominique de Ligny, Kyle G. Webber
Summary: The influence of stress on the phase boundaries and dielectric response of lead-free perovskite ceramics was investigated. The results showed that the phase transition temperatures increased and the dielectric and piezoelectric responses decreased with increasing stress. Additionally, applying stress at certain temperatures could enhance the dielectric properties of the ceramics.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Amir Mahdi Molavi, Parvin Alizadeh
Summary: Multiferroic composite materials with one-dimensional core-shell structure were successfully synthesized by electrospinning for the first time, and the influence of different synthesis routes on the properties of the composite fibers was investigated, with the second method showing higher saturation magnetization and dielectric constant.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
K. Dey, A. Ahad, K. Gautam, A. Tripathy, S. S. Majid, S. Francoual, C. Richter, M. N. Singh, A. Sagdeo, E. Welter, N. Vittayakorn, V. G. Sathe, R. Rawat, D. K. Shukla
Summary: This study demonstrates the relationship between structure and properties in tetragonal BZT-BCT ceramics, including local and average structure, macroscopic electromechanical and dielectric measurements. Polar nanoregions are manifested during the high-temperature cubic to tetragonal phase transformation, and an anomalous collaboration between ZrO6 and TiO6 octahedra is revealed through temperature-dependent local structural investigations.
Article
Chemistry, Multidisciplinary
Vladimir Lucian Ene, Valentin Razvan Lupu, Claudiu Vasile Condor, Roxana Elena Patru, Luminita Mirela Hrib, Luminita Amarande, Adrian Ionut Nicoara, Lucian Pintilie, Adelina-Carmen Ianculescu
Summary: Fine-tuning of grain sizes can greatly affect the interaction between different dielectric phenomena, allowing the development of materials with tailored dielectric responses. Understanding the relationship between grain size and dielectric properties can lead to the design and optimization of materials for specific applications.
Article
Physics, Applied
Xijie Jiang, Christian Dietz, Na Liu, Virginia Rojas, Robert W. Stark
Summary: The study using piezoresponse force microscopy revealed the evolution of domain structures in BZT-0.5BCT ceramics at micrometer and nanometer scales, showing the coexistence of wedge-shaped and lamellar domains at room temperature, with transitional domain structures appearing in both thermal and poling cycles. Additionally, the electric-field-dependent domain structure evolution demonstrated better reversibility at high temperatures, highlighting the superior stability of BZT-0.5BCT ceramics at medium temperatures for applications.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Chris M. Fancher, Ozgur Keles, Matthias Ehmke, Keith J. Bowman
Summary: This study used temperature-dependent in situ x-ray diffraction to investigate the evolution of the field-response mechanism of ferroelectric materials with temperature. The results showed that increasing the measurement temperature slightly reduced the extent of domain reversal and lattice strain magnitude, while predominantly affecting the angular dependence of the lattice strain.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Amir Mahdi Molavi, Parvin Alizadeh
Summary: BZT-0.5BCT nanofibers were prepared by sol-gel assisted electrospinning and post-calcination process. The study revealed three stages of polymer decomposition below 500 degrees C, oxide formation starting at around 300 degrees C, low crystallization temperature of 550 degrees C, and Curie temperature between 120 and 150 degrees C.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Suk-Young Jung, Gwangseop Lee, Tae-wan Kim, Sung-Jin Kim, Jung-Hyuk Koh
Summary: In this study, the characteristics of the lead-free piezoelectric ceramic 0.5BZT-0.5BCT were investigated for its potential use in piezoelectric transformers. The addition of a suitable dopant resulted in a piezoelectric transformer with improved output characteristics. Simulation and experimental results were compared and analyzed to validate the step-up amplification properties of the piezoelectric transformer at the vibrational frequency.
Article
Materials Science, Multidisciplinary
Yoo-Young Oh, Gwangseop Lee, Masao Kamiko, Jung-Hyuk Koh
Summary: This study focuses on the shrinkage phenomenon during the sintering process of lead-free piezoelectric ceramics, and determines the relationship between the piezoelectric and crystalline properties by estimating the activation energy. The results show that the sintering temperature can affect the piezoelectric and crystalline properties.
KOREAN JOURNAL OF METALS AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Moolchand Sharma, Satyanarayan Patel, A. Arockiarajan, Rahul Vaish
Summary: The study conducted creep and fatigue characterization on BZT-BCT bulk ferroelectric ceramics, finding that the material is stable below 75 degrees Celsius and can withstand high cycle fatigue loads, showing promise for potential applications.
FUNCTIONAL MATERIALS LETTERS
(2021)
Article
Chemistry, Physical
Chhavi Mitharwal, Geetanjali, Shilpa Malhotra, Anshika Bagla, Manish Kumar Srivastava, Surya Mohan Gupta, Chandra Mohan Singh Negi, Epsita Kar, Ajit R. Kulkarni, Supratim Mitra
Summary: The dopamine-modified filler incorporated PVDF composite shows potential for flexible energy storage and harvesting applications. The composite exhibits improved filler dispersion and dielectric properties, leading to enhanced energy harvesting and storage capabilities. Different filler contents result in varying energy storage density and energy harvesting performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
E. Venkata Ramana, N. M. Ferreira, A. Mahajan, D. M. Tobaldi, I Bdikin, B. Rozic, Z. Kutnjak, M. A. Valente
Summary: High-performance BCZT fiber crystals were grown using laser-heated pedestal growth, with varying stoichiometry achieved by changing growth rate. The optimized crystal showed larger energy storage density and higher EC responsivity compared to ceramic samples. These results suggest potential applications of BCZT as EC elements with controlled composition through fine-tuning growth parameters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Nicholas Cucciniello, Alessandro R. Mazza, Pinku Roy, Sundar Kunwar, Di Zhang, Henry Y. Feng, Katrina Arsky, Aiping Chen, Quanxi Jia
Summary: With the anticipated doubling of energy demand in the next three decades, there is a pressing need to advance the technology of energy harvesting and storage for renewable energy. This study focuses on a specific subset of dielectric materials, ferroelectrics, for energy storage. By exploring the influence of crystallographic orientation on the microstructure and properties, the research offers insights into enhancing energy storage performance.
Article
Materials Science, Multidisciplinary
N. S. Kiran Kumar, A. R. Jayakrishnan, J. P. B. Silva, K. C. Sekhar
Summary: This study investigates the impact of MgO doping on the microstructure, dielectric, ferroelectric, energy storage, and electrocaloric properties of lead-free ceramics. The results show that as the MgO content increases, the grain size decreases, and a morphotropic phase boundary behavior is observed at low MgO content. The addition of MgO also improves the diffused phase transition behavior and enhances the relaxor behavior of the ceramics. The optimum energy storage properties are exhibited by the 0.99BZCT-0.01MgO ceramics, with a recoverable energy density of 177.6 mJ/cm3 and an efficiency of 79% at an electric field of 45 kV/cm. Additionally, these ceramics demonstrate a robust energy storage performance even after 107 cycles, and exhibit an electrocaloric temperature change of 1.12 K and responsivity of 0.024 Kcm/kV.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Zhengkai Hong, Xiaoqin Ke, Dong Wang, Sen Yang, Xiaobing Ren, Yunzhi Wang
Summary: This study unravels the roles of point defects in the formation of relaxor ferroelectrics using computer simulations and the phase field method. It finds that both local-field and local-T-C effects play important roles in the formation of nanodomains in relaxors, leading to characteristic temperatures T-B, T *, and T-f.
Article
Materials Science, Ceramics
Mengye Yin, Minxia Fang, Lixue Zhang, Chao Zhou, Andong Xiao, Yuanchao Ji, Tianyu Ma, Xiaobing Ren
Summary: This study demonstrates that acceptor doping with Mn in lead-free piezoceramics leads to higher depolarization temperature and improved piezoelectric thermal stability. The clamping effect induced by acceptor doping is identified as the mechanism behind these enhancements.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Zhonghua Dai, Dingyan Li, Zhijian Zhou, Shun Zhou, Weiguo Liu, Jingjing Liu, Xi Wang, Xiaobing Ren
Summary: In this study, lead-free transparent ferroelectric ceramics with excellent transparency, high energy storage density, and minimal strain were achieved by introducing nanodomains, increasing the band gap energy, and reducing the grain size. This research demonstrates the potential applications of (K0.5Na0.5)NbO3-based ceramics for energy storage and provides a feasible approach of domain engineering for developing new lead-free energy storage transparency materials.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Tianzi Yang, Junming Gou, Xiaolian Liu, Yiqun Zhang, Tianyu Ma, Xiaobing Ren
Summary: This study provides an atomic-scale understanding of the K-S path by capturing the early-stage phase transformation from bcc to fcc in an aged Fe72Ga28 alloy. It discovers the formation of nano-embryonic product phases and the roles of lattice shear and thermally-activated atomic diffusions in the process.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Zhizhi Xu, Yanshuang Hao, Yuanchao Ji, Andong Xiao, Yu Qian, Wenjia Wang, Xiaobing Ren
Summary: This study demonstrates a method to increase yield stress and decrease Young's modulus in shape memory alloys through tensile plastic deformation at a specific temperature, with the mechanism revealed through experiments and theory. Similar effects were found in another ferroelastic alloy, suggesting that this strategy can be applied to optimize the performance of other ferroelastic materials as well.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
Fanbo Zhang, Zhonghua Dai, Weiguo Liu, Yongxing Wei, Zengzhe Xi, Xiaobing Ren
Summary: In this study, the energy storage density and efficiency of BNST-based ceramics were improved by introducing SBZ. The addition of SBZ resulted in a reduced phase transition temperature and enhanced relaxation. The 0.875BNST-0.125SBZ ceramic achieved a high recoverable energy density and energy efficiency, along with excellent temperature and frequency stability for energy storage. It also exhibited a high power density and transitory discharge time, making it suitable for high-power equipment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Tianzi Yang, Tianyu Ma, Feng Liu, Xiaobing Ren
Summary: This study provides insights into the characteristics of partial stacking faults (PSFs) and the interaction between lattice distortion and atomic diffusion in the formation of PSFs, through a case study on aged Fe-Ga alloy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Chang Liu, Yuanchao Ji, Jingxian Tang, Kazuhiro Otsuka, Yu Wang, Mengrui Hou, Yanshuang Hao, Shuai Ren, Pu Luo, Tianyu Ma, Dong Wang, Xiaobing Ren
Summary: Researchers have reported a lightweight magnesium-scandium strain glass alloy with stable elasticity and long fatigue life, and it exhibits a high elastic energy density over a wide temperature range.
Article
Chemistry, Physical
Ming Wu, Yanan Xiao, Yu Yan, Yongbin Liu, Huaqiang Li, Jinghui Gao, Lisheng Zhong, Xiaojie Lou
Summary: This study demonstrates a new strategy to design a ferroelectric dielectric with high temperature stability. By designing a multilayer relaxor ferroelectric thin film with a composition gradient, the temperature stability of the dielectric constant was greatly improved.
Article
Materials Science, Ceramics
Zhonghua Dai, Shengbin Wang, Yong Liu, Fanbo Zhang, Weiguo Liu, Xin Zhao, Xiangdong Ding, Minxia Fang, Xiaobing Ren
Summary: In this study, by introducing SrSc0.5Nb0.5O3 into (Bi0.5Na0.5Ti0.95Al0.025Nb0.025O3) [(1-x)BNTA-xSSN], a high recoverable energy storage density (W-rec) of about 2.7 J/cm(3) and energy storage efficiency (eta) of approximately 76% at 210 kV/cm were achieved at x=0.1; furthermore, eta was further improved to 85% at x=0.2. The modified .9BNTA-.1SSN showed excellent stability (thermal and frequency stability) at 150 kV/cm, surpassing other lead-free ceramics. The enhanced energy storage performance is attributed to increased relaxation degree and the formation of ferroelectric nanodomains, while the improved E-b is due to increased electrical resistivity and decreased grain size.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Liqiang He, Yang Yang, Chang Liu, Yuanchao Ji, Xiaojie Lou, Lixue Zhang, Xiaobing Ren
Summary: To achieve efficient and high-density energy storage in electrostatic capacitors, dielectric materials need to exhibit good performance over a wide temperature range. In this study, a crossover composition between antiferroelectric and relaxor antiferroelectric states is found to enable a high polarization change and low hysteresis. This leads to the development of lead-free Ag1-3xLaxNb0.9Ta0.1O3 (x=0.03) ceramics that demonstrate a large recoverable energy storage density (Wrec -8.6 J/cm3) with high efficiency (eta -85%) under 460 kV/cm. The x=0.03 ceramics also show excellent energy storage properties (Wrec > 6.8 J/cm3 with ultrahigh eta -90%) in the temperature range of 20-120 degrees C, thanks to the coexistence of micro- and nano-antiferroelectric domains.
Article
Materials Science, Multidisciplinary
Xiaoqin Ke, Dong Wang, Sen Yang, Xiaobing Ren, Yunzhi Wang
Summary: We report that the single domain generated from the vortex in ferroelectric nanodots will transform back to the vortex structure after removal of the external electric field, providing a large recoverable electrostrain. This recoverable electrostrain maintains a large value and a wide temperature range. The good recoverability is mainly attributed to the dipole-dipole interaction energy and the elastic interaction energy in the system. This work may contribute to the development of miniaturized actuators in MEMS or NEMS.
Article
Physics, Multidisciplinary
Minxia Fang, Yuanchao Ji, Yan Ni, Wenjia Wang, Hengmin Zhang, Xifei Wang, Andong Xiao, Tianyu Ma, Sen Yang, Xiaobing Ren
Summary: In this letter, researchers report a surprising low-temperature toughening phenomenon in a La-doped CaTiO3 perovskite ceramic. The fracture toughness of the ceramic increases by 2.5 times when cooling from above room temperature down to cryogenic temperature, due to the emergence of nanosized orthorhombic ferroelastic domains from the existing tetragonal ferroelastic matrix. This finding may lead to the design of tough ceramics with a wide temperature range and provide insights into reentrant transitions in other ferroic systems.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Ming Wu, Yu Yan, Yanan Xiao, Yongbin Liu, Huaqiang Li, Lisheng Zhong, Xiaojie Lou, Jinghui Gao
Summary: In this study, a flexible sensor was fabricated by depositing a Pb(Zr-0.52, Ti-0.48)O-3 thin film on a mica substrate, and it successfully detected the acoustic emission generated by the partial discharge of a 110 kV power cable. The flexible sensor, designed with an electromagnetic shielding structure, showed a relatively flat response in the frequency range of 100 to 1000 kHz with a sensitivity over 47.5 dB, which is beneficial for pattern recognition studies of acoustic emission. This work not only provides a flexible, anti-electromagnetic interference, and broadband sensor for acoustic emission detection, but also promotes the development and application of flexible ferroelectric materials.
Article
Engineering, Electrical & Electronic
Yongbin Liu, Qi Liu, Zhengwei Liu, Ming Wu, Xiaojie Lou, Jinghui Gao, Lisheng Zhong
Summary: Polymer composites typically exhibit high energy storage performance, but their thermal aging behavior is still puzzling. This study investigates the local phase separation phenomenon of a typical energy storage polymer blend PVDF/PMMA during thermal aging and discovers a reduction in dielectric properties. Further research suggests that the local phase separation of PVDF and PMMA in amorphous regions due to recrystallization may be responsible for the variation in dielectric properties.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
