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
Rong Zhuang, Bijun Fang, Shuai Zhang, Xiaolong Lu, Jianning Ding
Summary: A series of Sm3+-doped (1-y)Ba(Ti0.8Hf0.2)O3-y(Ba0.7Ca0.3)TiO3 nano phosphors were prepared by a hydrothermal method. The powders exhibited pure pseudo-cubic perovskite phase structure and showed dominant orange-red emission peaks under 409 nm excitation. The BHT-0.5BCT:0.005Sm3+ powder exhibited the optimal emission among the investigated samples.
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
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
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
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
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, 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
Jose P. B. Silva, Katarzyna Gwozdz, Luis S. Marques, Mario Pereira, Maria J. M. Gomes, Judith L. MacManus-Driscoll, Robert L. Z. Hoye
Summary: Combining the ferroelectric, pyroelectric, and photovoltaic properties in one material is a new way to enhance photodetector performance. By using the triple multifunctionality of 0.5Ba(Zr0.2Ti0.8)O-3-0.5(Ba0.7Ca0.3)TiO3 (BCZT) in an Al/Si/SiOx/BCZT/ITO thin-film device, a metal-ferroelectric-insulator-semiconductor heterostructure is formed. The device exhibits a photo-response that is independent of the chopper frequency due to the pyro-phototronic effect, which combines the pyroelectric and photovoltaic responses. However, the presence of ferroelectricity significantly improves the photodetector performance by four times compared to solely relying on the pyro-phototronic effect.
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
Physics, Condensed Matter
Feng-chao Su, Xiao-bin Guo, Xiao-ling Lu, Zheng Su, Wen-hai Qiu, Xin-gui Tang, Shui-feng Li, Wen-hua Li
Summary: 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BCZT) ceramics with average grain sizes ranging from 3.26 to 18.15 μm were synthesized by adjusting the sintering temperature. The effects of grain size on the dielectric, ferroelectric, and impedance properties of BCZT ceramics were investigated, and the presence of liquid phase in the grain boundary was observed. The competition between grain size effect and liquid phase in the grain boundary morphology significantly influenced the maximum dielectric constant and loss tangent. The improved compactness and hindered grain boundary conduction led to an increase in energy storage efficiency and a decrease in energy density. The quantitative analysis of different grain boundary morphologies on the electrical properties of BCZT ceramics was obtained through high-temperature impedance patterns and DC conductivity fluctuations. These findings are important for the design and preparation of targeted functional ceramics with specific microstructures.
PHYSICA B-CONDENSED MATTER
(2023)
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
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
Chemistry, Physical
Hwang-Pill Kim, Geon-Ju Lee, Jae-Hyeon Cho, Woo-Seok Kang, Sang-Goo Lee, Ho-Yong Lee, Wook Jo
Summary: The strain behavior of PMN-PT single crystals on different orientations was studied, revealing that the seemingly different strain behavior originated from the same mechanism, ruling out the contribution from polarization rotation. The experiment results suggested that the polarization vectors affecting the strain properties in PMN-PT are not restricted to a unique direction imposed by crystallographic symmetry.
JOURNAL OF MATERIOMICS
(2021)
Article
Instruments & Instrumentation
Xingchen Ma, Heinz von Seggern, Gerhard M. Sessler, Sergey Zhukov, Omar Ben Dali, Mario Kupnik, Xiaoqing Zhang
Summary: Fluorinated polyethylene propylene (FEP) ferroelectrets with an air-filled parallel-tunnel structure and regularly distributed bipolar space charges exhibit large piezoelectric activities and high thermal stability, making them suitable for flexible transducer applications. Experimental results show that FEP films have significant piezoelectric coefficients and can retain their properties even after mechanical testing and exposure to high humidity environments.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Materials Science, Ceramics
Qiumei Wei, Adeel Riaz, Sergey Zhukov, Kathrin Hofmann, Mankang Zhu, Yudong Hou, Jurgen Roedel, Lalitha Kodumudi Venkataraman
Summary: Quenching alkaline bismuth titanates leads to increased lattice distortion, higher depolarization temperature, and reduced ergodicity in the relaxor Na1/2Bi1/2TiO3-BaTiO3-K0.5Na0.5NbO3.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Ivan S. Vorotiahin, Anna N. Morozovska, Eugene A. Eliseev, Yuri A. Genenko
Summary: The influences of misfit strain, surface screening charges, and flexoelectric effect on a rhombohedral lead zirconate titanate ferroelectric/ferroelastic thin film have been studied, with findings showing that the magnitude and sign of misfit strain affect domain structure and surface screening charges determine the presence of closure domain structures. The flexoelectric effect plays a significant role in topologically nontrivial structures.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Polymer Science
Heinz von Seggern, Sergey Zhukov, Omar Ben Dali, Claas Hartmann, Gerhard M. Sessler, Mario Kupnik
Summary: Piezoelectrets are artificial ferroelectrics produced from non-polar air-filled porous polymers by symmetry breaking via high-voltage-induced Paschen breakdown. A novel three-layer polymer sandwich structure is introduced to separate electrical and mechanical responses, achieving high quasi-static and dynamic d33 coefficients. The study demonstrates the potential for further optimization and the importance of poling temperature on the stability of d33 coefficients.
Article
Chemistry, Physical
Matias Acosta, Federico Baiutti, Xuejing Wang, Andrea Cavallaro, Ji Wu, Weiwei Li, Stephen C. C. Parker, Ainara Aguadero, Haiyan Wang, Albert Tarancon, Judith L. MacManus-Driscoll
Summary: This study investigates the effects of surface chemistry and mesoporous structuring on oxygen exchange by using an etching process with acetic acid. The results show that increasing the surface exposure of transition metal cations and the active area through mesoporous structuring can enhance the oxygen exchange kinetics, leading to optimized energy device performance.
JOURNAL OF POWER SOURCES
(2022)
Review
Law
M. Acosta, Matias Nestore, Maria Esteli Jarquin-Solis, Robert Doubleday
Summary: This article presents a systematic review of publications between 2014 and 2020 to develop a typology of legislative scientific advice bodies. The study identifies trends and opportunities in the field, highlighting the concentration of research in western and high-income countries. The findings also reveal the increasing use of foresight and horizon scanning methodologies for participatory advice and long-term agenda setting in legislatures.
JOURNAL OF LEGISLATIVE STUDIES
(2022)
Article
Physics, Applied
Y. A. Genenko, S. Zhukov, M. -H. Zhang, K. Wang, J. Koruza
Summary: Ferroelectrics are multifunctional smart materials with the ability of polarization switching. Recent research has found similar switching properties in multiaxial polycrystalline ferroelectrics, which can be explained by a combination of multistep stochastic mechanism and inhomogeneous field mechanism models. Understanding these switching mechanisms is crucial for future digital information storage.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Omar Ben Dali, Sergey Zhukov, Romol Chadda, Anatoli Kasanski, Heinz von Seggern, Xiaoqing Zhang, Gerhard Martin Sessler, Mario Kupnik
Summary: By replacing the environmentally harmful fluorinated polymer FEP with eco-friendly polylactic acid (PLA), a new manufacturing route is introduced to build an artificial ferroelectret sandwich. The PLA films show promising stability in terms of charge and piezoelectric activity. The easy assembled eco-friendly sensors demonstrate potential applications in force myography with high classification accuracy.
IEEE SENSORS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Xingchen Ma, Sergey Zhukov, Heinz von Seggern, Gerhard M. Sessler, Omar Ben Dali, Mario Kupnik, Ying Dai, Pengfei He, Xiaoqing Zhang
Summary: This article reports biodegradable and bioabsorbable ferroelectret films made from polylactic acid (PLA) resins for highly sensitive transducer applications. By modification of the microstructure and polarization, pronounced longitudinal and transverse piezoelectric activities are realized in a single material. The preparation procedure of the PLA ferroelectrets is compatible with large-scale production lines and thus can greatly promote their applications in green electronics.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Olga Y. Mazur, Leonid I. Stefanovich, Yuri A. Genenko
Summary: A self-consistent stochastic model is developed to investigate the domain structure formation in a uniaxial ferroelectric undergoing a phase transition from a high-temperature paraelectric phase to a low-temperature ferroelectric phase. The model takes into account the applied electric field and the feedback effect through local depolarization fields, considering both polarization and field components as Gauss random variables. Analytical and numerical solutions are derived for the correlation functions of all involved variables, revealing a phase diagram and time-dependent evolution of average polarization and dispersion that exhibit plausible agreement with experimental data.
Proceedings Paper
Engineering, Electrical & Electronic
Omar Ben Dali, Youssef Sellami, Sergey Zhukov, Heinz von Seggern, Niklas Schaefer, Bastian Latsch, Gerhard M. Sessler, Philipp Beckerle, Mario Kupnik
Summary: In this work, an ultrasensitive piezoelectric insole using 3D-printed flexible piezoelectret is presented. The insole is printed using pure polypropylene filament and consists of eight independent sensors. The combination of high sensor sensitivity and foot movement opens new perspectives for diagnosis through gait analysis.
Proceedings Paper
Acoustics
Omar Ben Dali, Sergey Zhukov, Matthias Rutsch, Claas Hartmann, Heinz Von Seggern, Gerhard M. Sessler, Mario Kupnik
Summary: This study presents a method of building a ferroelectret air-coupled ultrasonic transducer using PLA material, which exhibits good sound pressure performance and bias effect, achieving a significant increase in sound pressure at the resonance frequency.
INTERNATIONAL ULTRASONICS SYMPOSIUM (IEEE IUS 2021)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Omar Ben Dali, Sergey Zhukov, Claas Hartman, Heinz von Seggern, Gerhard M. Sessler, Mario Kupnik
Summary: A biodegradable 3D printed ferroelectret was successfully created in this study, showing good charge stability at room temperature and exhibiting a large piezoelectric response. Additionally, it demonstrated remarkable piezoelectric coefficient and mechanical properties that mainly depend on its geometry.
