Article
Multidisciplinary Sciences
Daniel Bennett, Gaurav Chaudhary, Robert-Jan Slager, Eric Bousquet, Philippe Ghosez
Summary: Out-of-plane polar domain structures have been observed in strained and twisted bilayers of inversion symmetry broken systems. The symmetry breaking also results in an in-plane polarization component, which gives rise to non-trivial topological features in the polar domains. This finding suggests that polar domains in strained or twisted bilayers could serve as a platform for exploring topological physics in layered materials.
NATURE COMMUNICATIONS
(2023)
Article
Mechanics
Dan Sui, John E. Huber, Jie Zhou
Summary: The study utilizes superposition theory to analyze the boundary value problem of needle domains in barium titanate single crystals, revealing conditions for stabilizing needle domains and presenting simulation results of comb-like array evolution.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Chemistry, Multidisciplinary
Sachin Kumar, Vandna Luthra
Summary: This study investigated the variations in Raman and FTIR spectra of barium titanate induced by individual and co-doping of yttrium and tin. The results showed blueshift and redshift effects in different phonon modes with increasing doping levels, providing insights into the doping-induced effects in barium titanate.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Physics, Applied
X. Wen, G. Yang, Q. Ma, Y. Tian, X. Liu, D. Xue, Q. Deng, S. Shen
Summary: In this study, compositional gradients were introduced into Ba1-xSrxTiO3 systems to enhance the temperature stability of flexoelectric behavior. The improved stability in graded ceramics results from the engineered sequential Curie temperatures of individual layers and the positive correlation between dielectric constant and flexoelectricity, significantly reducing the drastic variations of flexoelectricity at different temperatures.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Long Wang, Jiqing Lv, Feng Shi, Kaixin Song, Wen Lei, Huanfu Zhou, Ze-Ming Qi, Jing Wang
Summary: The single-phase BaTiO3 ceramic was prepared by solid-state sintering at 1220 degrees C for 4 h. XRD analysis confirmed it as tetragonal phase BaTiO3 with space group P4mm (No. 99). The dielectric properties of the ceramic were analyzed using Raman and far-infrared spectroscopy, showing a dielectric constant of 20.0782 and dielectric loss of 19.9756 x 10(-4). The theoretical calculations were found to differ significantly from the tested data due to the spontaneous polarization in the tetragonal phase BaTiO3.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Veronica F. Michel, Tobias Esswein, Nicola A. Spaldin
Summary: The study found that both electron and hole doping decrease the tendency towards ferroelectricity, with an unexpected increase in polarization at small hole concentrations. Doping with impurity atoms increases complexity and allows identification of three factors influencing ferroelectricity: structural effects, electronic effects, and changes in unit-cell volume and shape resulting from the introduction of charge carriers. A competing balance between these contributions can lead to either an increase or decrease in ferroelectricity with doping.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
H. J. L. Clabel, Kelly T. Paula, M. A. Pereira-da-Silva, J. D. Vollet-Filho, J. E. Marega, C. R. Mendonca
Summary: Femtosecond lasers offer high performance and precision for fabricating optical and photonic devices due to their high resolution, flexibility, and low damage. BaTiO3:Er3+/Yb3+ (BTEY) perovskite films were successfully fabricated using spin coating at room temperature. The effects of different parameters in cylindrical focusing of the fs-laser on patterning were analyzed, and the energy ablation threshold (Eth) was measured. The results showed that the number of pulses per spot has an impact on patterning performance and surface morphology.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Mudasir Rashid Rather, Saima Jahan, Rubiya Samad, R. C. Meena, Khalid Sultan
Summary: We investigated the properties of (1 - x) Ba0.95Yb0.05TiO3-(x) NiFe1.95Yb0.05O4 multiferroic composites. X-ray diffraction analysis confirmed that the parent phases retained their crystal structures without the formation of new secondary phases. The composites exhibited two ferroelectric phase transitions, and Yb doping led to an increase in dielectric constant and reduction in leakage current. The presence of long-range magnetic order and magnetodielectric effect were also observed, suggesting the potential use of these materials in multifunctional devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Chen Zhang, Zixin Zhou, Zhuming Tang, Didier Ballo, Chun Wang, Gang Jian
Summary: The Sc2O3 doped Ba(Zr0.1Ti0.9)O-3 ferroelectric ceramics were investigated for their microstructure, domain structure, dielectric and ferroelectric properties. It was found that Sc2O3 doping decreased the grain size, while both 90 degrees and 180 degrees ferroelectric domains coexisted in the ceramics. The phase transition temperature and dielectric permittivity maximum decreased with increasing Sc2O3 content, but the relative dielectric constant temperature stability was improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Lang Chen, Ping Wang, Li Yang, Jiacheng Ling, Chao Liu, Yi Wang, Shousheng Zhang, Shaojie Feng, Xiusheng Wu, Pei Xu, Yunsheng Ding
Summary: Polydicyclopentadiene (PDCPD)/hydroxylated barium titanate (BTOH) and PDCPD/norbornene functionalized barium titanate (BTNA) composites were prepared using ROMP. The higher glass transition temperature (Tg) of PDCPD/BTNA was attributed to enhanced interfacial affinity. PDCPD/BTNA composites showed high dielectric constant due to interfacial polarization and low loss tangent due to nonconductive norbornene groups.
Article
Materials Science, Ceramics
Hiroya Nakata, Takayoshi Kiguchi, Osamu Hino
Summary: The study investigated the rheology of a BaTiO3 slurry using molecular-level simulations, revealing that the adsorption of DHP dispersant on the BaTiO3 surface significantly affects the viscosity of the slurry. This finding highlights the importance of the dispersant population near the BaTiO3 surface in controlling the rheology of the slurry, providing insights for the efficient optimization of slurry preparation.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Biochemical Research Methods
Aaron Doug Deen, Heleen M. M. Van Beusekom, Tom Pfeiffer, Mathijs Stam, Dominique De Kleijn, Jolanda Wentzel, Robert Huber, Antonius F. W. Van der Steen, Gijs Van Soest, Tianshi Wang
Summary: Spectroscopic Thermo-elastic Optical Coherence Tomography (TE-OCT) is a label-free, free-space imaging technique that provides dual contrast in optical imaging. By using short laser pulses to induce tissue deformation and measuring the resulting surface displacement, TE-OCT creates images based on optical reflectance and thermo-elastic deformation, allowing for the identification of tissue components through spectroscopic analysis.
BIOMEDICAL OPTICS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Kaiqian Jie, Hui Huang, Shuai Qin, Jianping Guo, Hongzhan Liu, Hongyun Meng, Faqiang Wang, Xiangbo Yang, Zhongchao Wei
Summary: An electronically controlled metasurface depolarizer is demonstrated in this paper, based on the time-domain integral average method and nano-material barium titanate. It can convert linearly polarized light to emergent light with a degree of polarization reduced to 2.5%, and has a transmission efficiency greater than 72%.
Article
Nanoscience & Nanotechnology
Jie Jiang, Zhizhong Chen, Yang Hu, Yu Xiang, Lifu Zhang, Yiping Wang, Gwo-Ching Wang, Jian Shi
Summary: The flexo-photovoltaic effect induced by strain-gradient engineering enables the activation of bulk photovoltaic effect in centrosymmetric semiconductors, expanding material choices for future sensing and energy applications. The experimental demonstration in MoS2 reveals the potential for new optoelectronic phenomena in strain-gradient-engineered materials.
NATURE NANOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Fernando Rubio-Marcos, Paula Pamies, Adolfo Del Campo, Jordi Tiana, Jonathan Ordonez-Pimentel, Michel Venet, Rocio E. Rojas-Hernandez, Diego A. Ochoa, Jose F. Fernandez, Jose E. Garcia
Summary: A clear correlation between optical absorption and light-induced strain in ferroelectrics is shown. The phenomenon of photoinduced electronic reconstruction at charged domain walls is proposed as the primary physical mechanism. These results provide a new pathway for designing ferroelectric-based devices with new functionalities, such as thickness gradient-based photo-controlled nanoactuators.
APPLIED MATERIALS TODAY
(2023)
Article
Materials Science, Ceramics
Zilong Xiong, Wenzhuo Xue, Mujun Li, Feihu Tan, Yupeng Chen, Hongyu Yu
Summary: In this study, CBS glass/Al2O3 composites were developed for LTCC applications based on a CaO-B2O3-SiO2 (CBS) glass system with a high boron content. The study revealed that the softening of glass and interfacial reaction between the glass and Al2O3 were the two most important factors affecting LTCC's densification process. Real-time shrinkage rate of LTCC during sintering was successfully simulated, and it was proven that the formation of the CaAl2(BO3)O phase played a significant role in reducing glass viscosity and promoting dense structure formation. The resulting LTCC composite exhibited excellent performance for high-frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Saurabh Kumar Sharma, Vinita Grover, Rakesh Shukla, Abid Hussain, Ambuj Mishra, Pawan Kumar Kulriya
Summary: In this study, the disordering caused by swift heavy ion irradiation in two different compositions of pyrochlore structures was investigated. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy were used to analyze the samples before and after irradiation. It was found that both compositions underwent amorphization due to irradiation, with a slower rate observed in Nd1.8Zr2.2O7.1. The irradiation-induced modified track region in Nd1.8Zr2.2O7.1 consisted of defect-rich pyrochlore structure, anion-deficient fluorite structure, and amorphous domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiabei He, Mengshan Song, Ming Yang, Miaomiao Zhu
Summary: This study investigates the influence of ion irradiation on high-entropy ceramics and finds that irradiation-induced lattice rearrangement can improve the radiation resistance of these ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jian Li, Jia Liu, Yongcui Zhang, Wei Sun, Yang Wang, Haitao Wu, Ling Li, Chuanbing Cheng, Yingying Wang, Ke Tan, Futian Liu
Summary: Microstructure design plays a crucial role in regulating the microwave dielectric properties of materials, however, the understanding of frequency temperature stability and related micromechanism remains limited. In this study, a combination of first-principles calculations and experimental observation was used to investigate the correlation among sintering behavior, crystal structure, bonding nature, and microwave dielectric properties of LnPO(4) (Ln = Eu, Pr) ceramics. The research findings systematically clarify the optimized effect and micromechanism of lanthanides on the dielectric properties of monazite ceramics, providing insights into the design and enhancement of microwave dielectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li
Summary: The study investigates the frictional and wear behaviors of carbon fiber-reinforced SiC ceramic matrix composites with different fiber orientations mating with ceramic balls. The results show that fiber orientation significantly affects the friction and wear properties of the composites. Pads with randomly arranged fibers demonstrate better friction stability and lower wear volume, potentially suitable for bearing material applications. The research also explores the factors influencing the formation of continuous tribo-film and identifies abrasive wear and oxidation wear as the dominant wear mechanisms for the friction pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sergey Nikolaevich Perevislov, Ilya Evgenievich Arlashkin, Valentina Leonidovna Stolyarova
Summary: This paper describes the synthesis and sintering of MAX phases in the Zr-Al-C system. Different mixtures of initial Zr/Al/C and Zr/Al/ZrC powders were used to synthesize Zr2AlC and Zr3AlC2 MAX phases. The highest content of Zr3AlC2 MAX phase was obtained using a component ratio of 1:1.5:2-51.1 vol.% of Zr/Al/ZrC powders.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Weijia Luo, Xubin Wang, Baiheng Bai, Jianli Qiao, Xingcong Chen, Yongzheng Wen, Jingbo Sun, Lingxia Li, Ji Zhou
Summary: This study successfully establishes the relationship between internal strain and dielectric loss by synthesizing and designing specific structure of tungsten bronze ceramics, and concludes that controlling internal strain can effectively reduce dielectric loss. This research is of great significance for the development of future all-ceramic non-Hermitian devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
JiaNan Wang, ZhiQiang Li, YongZheng Zhu, Yao Liang, Yan Cui, HuaLong Tao, Bo Song, Alexander Nikiforov, ZhiHua Zhang
Summary: First-principles calculations were performed to investigate the crystal structure, electronic structure, and ion diffusion of sulfur-doped Li2FeSiO4. The results showed that sulfur doping can improve the electronic conductivity and reduce the energy barrier for ion diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Xiaodi Dai, Serdar Aydin, Mert Yuecel Yardimci, Gunter Reekmans, Peter Adriaensens, Geert De Schutter
Summary: This study investigates the rheological behavior, solidification process, and nanostructure changes of sodium hydroxide-activated slag (NH-AAS) and sodium silicate-activated slag (SS-AAS) pastes over time. The results show that NH-AAS and SS-AAS release similar heat and reach a similar reaction degree at their initial setting times, but have different gel structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yanliang Ji, Simon Becker, Zichen Lu, Alexander Mezhov, Regine von Klitzing, Schmidt Wolfram, Dietmar Stephan
Summary: This study reveals the significant influence of resting time on the rheological properties of cement suspensions, which is closely related to non-absorbed polycarboxylate superplasticizers (PCEs) size variation. Adsorbed PCE during resting tends to bridge particles instead of dispersing them, leading to an increased yield stress.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zun Xia, Yedong Rong, Hao Li, Ye Dong, Hongbo Yu, Jie Xu, Xiuhui Wang, Jinlong Yang
Summary: This study presents the synthesis of hollow MgAl2O4 particles in situ within porous ceramics, resulting in volume expansion and the formation of a hierarchical pore structure, leading to a significant improvement in compressive strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Honglong Wang, Zhiguo Sun, Faming Xia, Chenguang Yang, Xiaoguang Wang, Jintang Li, Linxu Jiang
Summary: In this study, the micro-geometry morphology variation and microstructural transformation mechanism of muscovite crystals under electron beam irradiation were explored. The results revealed the instability of the muscovite lattice under irradiation, as well as the expansion and shrinkage of the lattice with increasing dose. The study also identified changes in chemical structure and other mechanisms involved. These findings are significant for the design of radiation-resistant silicate materials and the manufacturing of electronic components used in the aerospace industry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)