A5034340826- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Dielectric materials and actuators
- Dielectric properties of ceramics
- Photorefractive and Nonlinear Optics
- Advanced Sensor and Energy Harvesting Materials
- Advanced Battery Materials and Technologies
- Ultrasonics and Acoustic Wave Propagation
- Solid-state spectroscopy and crystallography
- Photonic and Optical Devices
- Metamaterials and Metasurfaces Applications
- Electronic and Structural Properties of Oxides
- Advancements in Battery Materials
- Advanced Fiber Laser Technologies
- Advanced Antenna and Metasurface Technologies
- Optical and Acousto-Optic Technologies
- Antenna Design and Analysis
- Perovskite Materials and Applications
- Microwave and Dielectric Measurement Techniques
- Microwave Engineering and Waveguides
- Nonlocal and gradient elasticity in micro/nano structures
- Multimodal Machine Learning Applications
- Magnetic and transport properties of perovskites and related materials
Institute of Technology of Cambodia
2025
Xiamen University
2025
Jiangxi Agricultural University
2025
Xi'an Jiaotong University
2015-2024
Hong Kong Polytechnic University
2022-2024
East China Jiaotong University
2024
Chinese Academy of Sciences
2014-2024
Tsinghua University
2024
State Key Laboratory of New Ceramics and Fine Processing
2024
High Magnetic Field Laboratory
2024
A design methodology for developing lead-free bulk ceramics with large recoverable energy storage density was proposed in this study.
Perovskite solid solution ceramics of (1 − x ) BaTiO 3 – Bi ( Mg 2/3 Nb 1/3 O BT BMN = 0.05–0.2) were synthesized by solid‐state reaction technique. The results show that the addition could lower sintering temperature ‐based ceramics. X ‐ray diffraction reveal a pure perovskite structure for all studied samples. Dielectric measurements exhibit relaxor‐like characteristic ceramics, where broadened phase transition peaks change to temperature‐stable permittivity plateau (from −50°C 300°C) with...
The findings in this study could broaden the applications of KNN materials a new field.
Solid-state dielectric energy storage is the most attractive and feasible way to store release high power compared chemical batteries electrochemical super-capacitors.
Ceramics of composition Ag<sub>1−3x</sub>Bi<sub>x</sub>NbO<sub>3</sub> (0.005 ≤ <italic>x</italic> 0.040) were prepared by solid state methods and their structure electrical behavior characterized with a view to potential use as high power energy storage materials.
The piezoelectric response of [001] poled domain engineered (1-x)Pb(Mg(13)Nb(23))O(3)-xPbTiO(3) (PMN-PT) crystals was investigated as a function composition and phase using Rayleigh analysis. results revealed that the intrinsic (reversible) contribution plays dominant role in high activity for PMN-PT crystals. monoclinic (M(C)) PMN-xPT crystals, 0.31</=x</=0.35, exhibited peak values compositions close to R-M(C) M(C)-T boundaries, however, being less than 2000 pCN. In rhombohedral region,...
The electrostrictive effect has some advantages over the piezoelectric effect, including temperature stability and hysteresis-free character. In present work, we report diffuse phase transitions properties in lead-free Fe3+-doped 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 (BZT-0.5BCT) ferroelectric ceramics. doping concentration was set from 0.25 to 2 mol %. It is found that by introducing Fe3+ ion into BZT-0.5BCT, corresponding permittivity maximum Tm shifted toward lower monotonically 37 °C...
Ag(Nb<sub>0.8</sub>Ta<sub>0.2</sub>)O<sub>3</sub> is used here as a model system to shed light on the nature of low temperature phase behavior unsubstituted parent compound AgNbO<sub>3</sub>, which an important material for high-power energy storage applications.
Electrical characterizations of Nb2O5 doped 0.65BiFeO3–0.35BaTiO3 (0.65BF–0.35BT) ceramic were carried out over broad temperature and frequency ranges through dielectric spectroscopy, impedance ac conductivity measurements. The constant loss tangent are drastically reduced with introducing into the 0.65BF–0.35BT system. Two anomalies detected in regions 100 °C ≤ T 280 350 480 °C, Curie (TC) was confirmed higher region. A relaxation large constants near TC. This becomes even stronger gradual...
The (Nb + In) co-doped TiO2 ceramics recently attracted considerable attention due to their colossal dielectric permittivity (CP) (∼100,000) and low loss (∼0.05). In this research, the 0.5 mol. % In-only, Nb-only, 0.5–7 were synthesized by standard conventional solid-state reaction method. Microstructure studies showed that all samples in pure rutile phase. Nb ions homogeneously distributed grain boundary. Impedance spectroscopy I-V behavior analysis demonstrated may compose of...
Lead-free (Bi0.5Na0.5)TiO3 (BNT)-based relaxor ferroelectric (RFE) ceramics have attracted a lot of attention due to their high power density and rapid charge-discharge capabilities, as well potential application in pulse capacitors. However, because the desire for smaller electronic devices, energy storage performance (ESP) should be enhanced even further. We describe defect engineering strategy enhancing antiferroelectric-like RFE feature BNT-based by unequal substitution rare-earth La3+...
Relaxor-lead titanate (PbTiO3) crystals, which exhibit extremely high piezoelectricity, are believed to possess electro-optic (EO) coefficients. However, the optical transparency of relaxor-PbTiO3 crystals is severely reduced as a result light scattering and reflection by domain walls, limiting applications. Through synergistic design ferroelectric phase, crystal orientation, poling technique, we successfully removed all light-scattering walls achieved an transmittance 99.6% in...
A stepwise optimization route yields a general way to design synthetic ESP ceramics. NBT-BST-BMS-VPP ceramics obtain an ultrahigh W rec of 7.5 J cm −3 under 440 kV −1 .
Although relaxor ferroelectrics have been widely investigated owing to their various advantages, there are still impediments boosting energy-storage density (Wrec) and efficiency (η). In this paper, we propose a cooperative optimization strategy for achieving comprehensive outstanding performance in (Na0.5Bi0.5)0.7Sr0.3TiO3 (NBST)-based ceramics by triggering nonergodic-to-ergodic transformation optimizing the forming process. The first step of substituting NaNbO3 (NN) NBST generated an...
Abstract The increasing awareness of environmental concerns has prompted a surge in the exploration lead-free, high-power ceramic capacitors. Ongoing efforts to develop lead-free dielectric ceramics with exceptional energy-storage performance (ESP) have predominantly relied on multi-component composite strategies, often accomplished under ultrahigh electric fields. However, this approach poses challenges insulation and system downsizing due necessary working voltage such conditions. Despite...
We have measured the flexophotovoltaic effect of single crystals halide perovskites MAPbBr3 and MAPbI3, as well benchmark oxide perovskite SrTiO3. For perovskites, is found to be orders magnitude larger than for SrTiO3, indeed large enough induce photovoltages bigger band gap. Moreover, we find that in MAPbI3 additional a native bulk photovoltaic response switchable ferroelectric-like. The results suggest strain gradient engineering can powerful tool modify output even already...
Flexoelectric effect, which is defined as strain gradient–induced polarization or electric in crystalline solids, can be presented a fourth-rank tensor. The symmetry of the flexoelectric coefficients matrix form studied. results indicate that direct should 3 × 18 and converse 6 9 form, rather than like elastic constants. In addition, non-zero independent elements matrices have been calculated for 32 point groups 7 Ci groups. These will provide valuable reference to theoretical application...
In 0.95[0.94Bi0.5Na0.5TiO3-0.06BaTiO3]-0.05CaTiO3 ceramics, the temperature TS (dielectric permittivity shoulder at about 125 °C) represents a transition between two different thermally activated dielectric relaxation processes. Below TS, approximately linear decrease of with logarithm frequency was attributed to presence dominant ferroelectric phase. Above shows more complicated dependence and Raman modes indicate sudden increase in spatial disorder material, which is ascribed nonpolar...