Article
Physics, Multidisciplinary
Zishen Tian, Michael Xu, Jieun Kim, Hao Pan, Djamila Lou, Xiaoxi Huang, James M. Lebeau, Lane W. Martin
Summary: Superlattices of [BaTiO3]m/[BaZrO3]n (m, n = 4-12) are used to demonstrate the fabrication and control of an artificial relaxor. Experimental results show the successful production of high-quality heterostructures. The study reveals a transition in the dielectric properties of the materials as the BaTiO3 layer thickness decreases.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Ceramics
Wenbo Ye, Chenghao Zhu, Yiming Xiao, Xingzhi Bai, Peng Zheng, Jingji Zhang, Wangfeng Bai, Qiaolan Fan, Liang Zheng, Yang Zhang
Summary: The low dielectric breakdown strength and poor thermal stability of BiFeO3-based relaxor ferroelectric ceramics have hindered their actual pulse capacitor application. In this work, nanodomain-engineered and grain-engineered BiFeO3-BaTiO3-CaTiO3 relaxor ferroelectric ceramics were manufactured to solve these issues. The introduction of CaTiO3 led to the formation of nanoscale domains, resulting in temperature-insensitive dielectric response and almost hysteresis-free polarization field response. Moreover, the refinement of the grain size and the depression of the oxygen vacancy concentration greatly enhanced the dielectric breakdown strengths. As a result, the ceramics exhibited remarkable energy-storage performances, high recoverable energy density, high efficiency, outstanding thermal stability, ultrafast release time, and high power density, indicating their enormous potential for pulse capacitor applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Qian Li, Yangbin Liu, Jinfeng Liu, Kexin Song, Haisheng Guo, Fei Li, Zhuo Xu
Summary: Relaxor-PbTiO3 crystals have attracted widespread attention in the past two decades due to their excellent piezoelectric properties. However, the segregation of components during crystal growth results in low-performance consistency for Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) crystals, which limits their practical applications. This study introduces Nd3+ as A-site substitution to improve the uniformity of the electromechanical performance of PMN-PT crystals and achieves a high piezoelectric coefficient in the rhombohedral phase.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Qingyuan Hu, Huimin Liao, Xin Liu, Li Jin, Kexin Song, Yongyong Zhuang, Zhuo Xu, Vladimir Ya Shur, Xiaoyong Wei
Summary: In this study, a thermal annealing and high temperature poling approach is proposed to enhance the piezoelectricity of Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals. The manipulation of defects and defect polarization orientation results in a more polarized crystal. The improved piezoelectric property achieved under a maintained Curie temperature indicates the feasibility of the approach.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Physical
Shao Bo Chen, Jia Yi Yang, Shu Ya Wu, Xiang Ming Chen
Summary: The variations of dielectric, ferroelectric and piezoelectric characteristics of BaZrO3-modified (Ba0.85Ca0.15)TiO3 ceramics have been investigated, and the morphotropic phase boundary (MPB) is determined at x=0.12 where significant enhancements are achieved. The ceramics exhibit a crossover from normal to diffused and relaxor ferroelectric behavior with increasing x.
JOURNAL OF MATERIOMICS
(2021)
Article
Nanoscience & Nanotechnology
Geng Huangfu, Jianwei Chen, Jie Jiao, Yiping Guo, Haosu Luo
Summary: The lattice structure of (Na0.5Bi0.5)TiO3-BaTiO3 (NBT-BT) and its ferroelectric-ferroelastic transitions were investigated. The results revealed the complex process of the ferroelectric-ferroelastic transition of NBT and confirmed the transition in tetragonal NBT-8BT for the first time. The study provides new insights for understanding ferroelasticity and the evolution of phonon modes in lead-free relaxor materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Hoang Thien Khoi Nguyen, Trang An Duong, Sang Sub Lee, Chang Won Ahn, Hyoung-Su Han, Jae-Shin Lee
Summary: The effects of CaTiO3 and BaZrO3 modification on lead-free piezoelectric ceramics were compared, showing different impacts on phase transition with CaTiO3 maintaining strong ferroelectricity and BaZrO3 inducing a transition from a nonergodic relaxor phase to an ergodic relaxor phase. The substitution of large ions into the B-sites in ceramics plays a significant role in the phase transition behavior.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Materials Science, Ceramics
Tao Cui, Annan Yu, Yangyu Zhang, Jian Guo, Xiongjie Li, Shun Guo, Ji Zhang, Jing Wang, Shan-Tao Zhang
Summary: Dielectric capacitors, particularly lead-free ceramics, have great potential in high power and pulsed power electronic devices. However, the relatively small recoverable energy storage density is a challenge. This study successfully improved the relaxor behavior and breakdown strength of a specific ceramic composition, resulting in superior comprehensive energy storage performance and reliability, making it a prospective alternative for electrostatic energy storage.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Yuanhao Lu, Juping Xu, Baisheng Ma, Linan An, Wen Yin, Ying Liu, Tao Li
Summary: The origins of the giant piezoresponse in relaxor ferroelectrics have been successfully understood through the growth and analysis of Ho-doped Pb(Mg-1/Nb-3(2/3))O-3-PbTiO3 (Ho-PMNT) single crystals. It was found that the giant piezoelectric response originates from the composition near the tricritical triple point of different structural phases. The study also analyzed the nanoscale heterogeneities and their connection to local polarization.
MATERIALS TODAY ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
V Bovtun, D. Nuzhnyy, M. Kempa, T. Ostapchuk, V Skoromets, J. Suchanicz, P. Czaja, J. Petzelt, S. Kamba
Summary: By studying the solid solution ceramics, it was found that the dielectric response characteristics of BT-100x%PMN ceramics exhibit features of diffuse phase transition rather than relaxor ferroelectricity.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Chemistry, Physical
Dafu Zeng, Qinpeng Dong, Peng Nong, Yue Pan, Ming Zhao Xu, Xiang Wang, Jiaming Wang, Xiuli Chen, Huanfu Zhou
Summary: New environmental protection energy storage devices have been widely studied, and BaTiO3-based ceramics are considered excellent materials for achieving high energy storage. In this study, a series of (1-x)BaTiO3-x(Bi0.5Li0.5)(Ti0.5Sn0.5)O3 ceramics were successfully synthesized, with 0.2BLST ceramics exhibiting high energy storage density and efficiency under certain conditions. These ceramics also displayed outstanding stability and excellent charge-discharge performance, making them a promising lead-free energy material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Ting Wang, Haiming Zhang, Yueyun Huang, Jiaming Chen, Weiping Gong
Summary: This study improves the breakdown strength, relaxation behavior, and energy-storage performance of BaTiO3-BiFeO3 ceramics by adding Bi(Mg2/3Ta1/3)O-3, leading to the generation of polar nanoregions (PNRs). The composite ceramics demonstrate excellent efficiency and high recoverable energy density at 240 kV/cm, along with high stability and good thermal stability in a wide range of frequencies and temperatures. These properties make the Bi(Mg2/3Ta1/3)O3-doped 0.33BaTiO3-0.67BiFeO3 ceramic attractive for energy-storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Christophe Daumont, Quentin Simon, Sandrine Payan, Pascal Gardes, Patrick Poveda, Mario Maglione, Beatrice Negulescu, Nazir Jaber, Jerome Wolfman
Summary: This study investigates the potential of BCTZ thin films for tunable ferroelectric capacitors, showing high performance achieved through the CPLD method. The results demonstrate that compounds close to (Ba0.84Ca0.16)(Ti0.8Zr0.2)O-3 exhibit the best performance, while a zone with compositions around (Ba0.91Ca0.09)(Ti0.81Zr0.19)O-3 show the best compromise between tuning ratio and figure of merit.
Article
Materials Science, Ceramics
Nikola Novak, Florian Weyland, George A. Rossetti
Summary: The study found that the electrocaloric effect of Ba(ZrxTi1-x)O-3 (BZT) decreases significantly with increasing Zr concentration, but an enhanced electrocaloric responsivity occurs at the triple point composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Gopal Prasad Khanal, Ichiro Fujii, Sangwook Kim, Shintaro Ueno, Satoshi Wada
Summary: Lead-free piezoelectric ceramics were prepared with the addition of (Bi0.5K0.5)TiO3 and BiFeO3 components via solid-state reaction method. The study found that increasing the concentration of (Bi0.5K0.5)TiO3 can enhance the piezoelectric performance of the material while reducing the dielectric maximum temperature.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Crystallography
Matias Velazquez, Fabrice Bert, Philippe Mendels, Dominique Denux, Philippe Veber, Michel Lahaye, Christine Labrugere
JOURNAL OF CRYSTAL GROWTH
(2020)
Article
Crystallography
C. Stelian, M. Velazquez, P. Veber, A. Ahmine, T. Duffar, P. de Marcillac, A. Giuliani, D. V. Poda, S. Marnieros, C. Nones, V. Novati, E. Olivieri, A. S. Zolotarova, H. Cabane, T. Redon
JOURNAL OF CRYSTAL GROWTH
(2020)
Article
Materials Science, Multidisciplinary
Jurij Koruza, Hairui Liu, Marion Hoefling, Mao-Hua Zhang, Philippe Veber
JOURNAL OF MATERIALS RESEARCH
(2020)
Article
Chemistry, Inorganic & Nuclear
Jordi Ibanez, Juan Angel Sans, Vanesa Cuenca-Gotor, Robert Oliva, Oscar Gomis, Placida Rodriguez-Hernandez, Alfonso Munoz, Ulises Rodriguez-Mendoza, Matias Velazquez, Philippe Veber, Catalin Popescu, Francisco Javier Manjon
INORGANIC CHEMISTRY
(2020)
Article
Materials Science, Ceramics
Maria Isabel Rua Taborda, Catherine Elissalde, U-Chan Chung, Mario Maglione, Egon Fernandes, Armaghan Salehian, Onuma Santawitee, Helene Debeda
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2020)
Article
Materials Science, Ceramics
Blessing N. Ezealigo, Roberto Orru, Catherine Elissalde, Helene Debeda, U-Chan Chung, Mario Maglione, Giacomo Cao
Summary: The structural and dielectric properties of BTZ ceramics prepared using SPS from powders obtained via SHS are strongly influenced by the sintering temperature, with post-annealing leading to phase transitions. SPS ceramics with compositions 0.05 < x < 0.20 sintered at 1200 degrees C exhibit standard ferroelectric behavior. The BTZ ceramic with 5% Zr shows the best dielectric permittivity and piezoelectric properties among the compositions studied.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
N. Spampinato, G. Pecastaings, M. Maglione, G. Hadziioannou, E. Pavlopoulou
Summary: The study investigates the blend of ferroelectric polymer P(VDF-co-TrFE) with semiconducting polymer P3HT using scanning probe microscopy techniques. It reveals that P3HT tends to stay at the film surface, with an almost constant composition, and increasing P3HT content causes segregation at the upper layers of the films. The three-dimensional morphology of this polymer blend deviates significantly from the ideal morphology proposed for efficient memory devices.
COLLOID AND POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Julia Mari-Guaita, S. Gallego-Parra, J. A. Sans, M. Velazquez, Philippe Veber, P. Rodriguez-Hernandez, A. Munoz, F. J. Manjon
Summary: This study reports an experimental investigation of (Gd1-xYbx)(2)O-3 under high pressure using Raman scattering measurements and ab initio calculations, revealing a phase transition sequence different from that of pure Gd2O3. Theoretical calculations helped identify different polymorphs and assign the symmetry of Raman-active modes in the three phases. The pressure coefficients of Raman-active modes in the three phases were reported and compared to those of pure Gd2O3 and other rare-earth sesquioxides.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Christophe Daumont, Quentin Simon, Sandrine Payan, Pascal Gardes, Patrick Poveda, Mario Maglione, Beatrice Negulescu, Nazir Jaber, Jerome Wolfman
Summary: This study investigates the potential of BCTZ thin films for tunable ferroelectric capacitors, showing high performance achieved through the CPLD method. The results demonstrate that compounds close to (Ba0.84Ca0.16)(Ti0.8Zr0.2)O-3 exhibit the best performance, while a zone with compositions around (Ba0.91Ca0.09)(Ti0.81Zr0.19)O-3 show the best compromise between tuning ratio and figure of merit.
Article
Chemistry, Physical
Maria Poienar, Matthias Josef Gutmann, Gheorghe Lucian Pascut, Vaclav Petricek, Gavin Stenning, Paulina Vlazan, Paula Sfirloaga, Carsten Paulmann, Martin Tolkiehn, Pascal Manuel, Philippe Veber
Summary: In this paper, a new synthesis method for mixed valence iron phosphate is reported, and temperature-dependent measurements of structural and physical properties are performed to understand the electronic-structural interplay in this compound. The results show that a structural phase transition and electronic ordering occur at a temperature similar to 213K, and three-dimensional antiferromagnetic ordering is observed at low temperatures.
Article
Crystallography
Maria Poienar, Paula Svera, Bogdan-Ovidiu Taranu, Catalin Ianasi, Paula Sfirloaga, Gabriel Buse, Philippe Veber, Paulina Vlazan
Summary: In this study, Ni-11(HPO3)(8)(OH)(6) materials with catalytical and fluorescence properties were synthesized through a hydrothermal approach. The electrode modified with reduced graphene oxide, carbon black, and nickel phosphite exhibited the highest current density, attributed to the synergistic effect between the nickel phosphite and carbon materials. The investigation of the electrode's oxygen evolution reaction performance revealed promising results, and fluorescence properties were analyzed at an excitation length of 344 nm.
Article
Chemistry, Physical
M. Gerin, D. Machon, S. Radescu, S. Le Floch, Y. Le Godec, T. Gaudisson, F. Alabarse, P. Veber, R. Debord, D. Amans, V. Pischedda
Summary: The high-pressure behavior of Si0.8Ge0.2 alloy is explored using in situ Raman spectroscopy, X-ray diffraction techniques, and density functional theory (DFT) simulations. It was found that the alloy undergoes pressure-induced transitions from the stable cubic semiconducting phase to the tetragonal beta-tin metallic phase during compression. Upon decompression, successive transitions towards metastable phases are observed. This research is important for understanding the effects of alloying on physical properties and for potential applications in optoelectronics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Constance Toulouse, Danila Amoroso, Robert Oliva, Cong Xin, Pierre Bouvier, Pierre Fertey, Philippe Veber, Mario Maglione, Philippe Ghosez, Jens Kreisel, Mael Guennou
Summary: In this paper, the high pressure behavior of BaZrO3 is reexamined using first-principle calculations, Raman spectroscopy and x-ray diffraction. The cubic-to-tetragonal transition at 10 GPa is experimentally confirmed, while no evidence for other phase transitions is found up to 45 GPa, contradicting past reports. Density functional theory calculations show that the tetragonal phase becomes more stable with increasing pressure compared to phases with more complex tilt systems, ruling out the possibility of a second transition to another tilted phase at higher pressures, particularly the common orthorhombic Pnma structure.
Article
Chemistry, Multidisciplinary
Philippe Veber, Karol Bartosiewicz, Jerome Debray, Sebastien Pairis, Vincent Motto-Ros, Ana Borta-Boyon, Franck Levassort, Matias Velazquez, Ruben Vera, Kei Kamada, Akira Yoshikawa
