A5014465552- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- Dielectric materials and actuators
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Dielectric properties of ceramics
- Graphene research and applications
- Acoustic Wave Resonator Technologies
- Advanced Sensor and Energy Harvesting Materials
- Advancements in Solid Oxide Fuel Cells
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- 2D Materials and Applications
- Supercapacitor Materials and Fabrication
- Gas Sensing Nanomaterials and Sensors
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- High voltage insulation and dielectric phenomena
- Fuel Cells and Related Materials
- Advanced Battery Technologies Research
- Electrospun Nanofibers in Biomedical Applications
- MXene and MAX Phase Materials
- ZnO doping and properties
Guangdong University of Technology
2016-2024
Dongguan South China Design and Innovation Institute
2023
Xi'an Jiaotong University
2021
North University of China
2021
Smart Material (Germany)
2020
King Abdullah University of Science and Technology
2011-2016
Fu Jen Catholic University
2011
Functionalized graphene has been extensively studied with the aim of tailoring properties for gas sensors, superconductors, supercapacitors, nanoelectronics, and spintronics. A bottleneck is capability to control carrier type density by doping. We demonstrate that a two-step process an efficient way dope graphene: create vacancies high-energy atom/ion bombardment fill these desired dopants. Different elements (Pt, Co, In) have successfully doped in single-atom form. The high binding energy...
Both relaxor ferroelectric and antiferroelectric materials can individually demonstrate large electrocaloric effects (ECE). However, in order to further enhance the ECE it is crucial find a material system, which exhibit simultaneously both properties, or easily convert from one into another terms of compositional tailoring. Here we report on structure readily change vice versa. To this end Pb0.89La0.11(Zr0.7Ti0.3)0.9725O3 Pb0.93La0.07(Zr0.82Ti0.18)0.9825O3 ceramics were designed near...
Barium zirconate titanate (BZT) (Ba(ZrxTi1–x)O3) ceramics with Zr4+ contents of x = 5, 10, 15, 20, 25, and 30 mol % were prepared using a solid-state reaction approach. The microstructures, morphologies, electric properties characterized X-ray diffraction, scanning electron microscopy, impedance analysis methods, respectively. dielectric analyses indicate that the BZT bulk show characteristics phase transition from normal ferroelectric to relaxor increasing ionic content. electrocaloric...
High quality Bi1−xDyxFeO3 (0 ≤ x 0.15) ceramics have been fabricated by sintering Dy-doped BiFeO3 (BFO) precursor powders at a low temperature of 780 °C. The magnetic properties BFO were improved the introduction Dy on Bi-site. More importantly, well saturated ferroelectric hysteresis loops and polarization switching currents observed room temperature. A large remnant (2Pr) value 62 μC/cm2 is achieved, which highest reported so far for rare-earth-doped ceramics. Moreover, mechanisms...
Abstract (Ba 1− x Sr )(Mn y Ti )O 3 (BSMT) ceramics with = 35, 40 mol% and 0, 0.1, 0.2, 0.3, 0.4, 0.5 were prepared using a conventional solid-state reaction approach. The dielectric ferroelectric properties characterized impedance analysis polarization-electric field ( P – E ) hysteresis loop measurements, respectively. adiabatic temperature drop was directly measured thermocouple when the applied electric removed. results indicate that high permittivity low losses obtained by doping...
A stable relaxor AFE R phase in NaNbO 3 -based ceramics is achieved. An excellent W rec of ∼11.09 J cm −3 and an η ∼85.7% were realized at 1200 kV −1 for x = 0.30 thick film ceramic.
Interaction between single noble metal atoms and graphene edges has been investigated via aberration-corrected monochromated transmission electron microscopy. A collective motion of the Au atom nearby carbon is observed in transition energy-favorable configurations. Most trapping detrapping processes are assisted by dangling atoms, which more susceptible to knock-on displacements irradiation. Thermal energy lower than activation barriers among different configurations, suggests electron-beam...
In situ high-resolution synchrotron x-ray diffraction reveals a local minimum in rhombohedral distortion angle αR (associated with an inflection the lattice constant aR) near 400 and 350 °C BiFeO3 (BFO) (BiFeO3)0.95(BaTiO3)0.05 (BFO–5%BT), respectively. It suggests coupling between ferroelectric magnetic parameters antiferromagnetic–paramagnetic transition, which is responsible for broad frequency-dependent dielectric maxima. A (R)–orthorhombic (O)–cubic (C) transition sequence takes place...
Barium strontium zirconate titanate ceramics ((BaSr)(ZrTi)O3-BSZT) with Zr4+ ionic contents of 15 and 20 mol % Sr2+ 15, 20, 25, 30 were prepared using a solid-state reaction approach. X-ray diffraction scanning electron microscopy used to characterize the lattice structure morphologies ceramics. Permittivity polarization as function temperature characterized an impedance analyzer Tower-Sawyer circuit. The electrocaloric effect was measured directly calculated Maxwell relation (indirectly)....
Abstract Solid-state cooling technology based on electrocaloric effect (ECE) has been advanced as an alternative to replace the vapour-compression approach overcome releasing of global warming gases. However, development in high ECE materials is still a challenge. In this work, polarization merging strategy was proposed achieve large x Ba(Sn 0.07 Ti 0.93 )O 3 -( 1 − )Ba(Hf 0.1 0.9 ferroelectric ceramics, where = 0, 0.2, 0.4, 0.6, 0.8, and 1. with orthorhombic phase Ba(Hf rhombohedral at room...
Structure, magnetization, and dielectric permittivity of (1-x)BiFeO3-xBaTiO3 (BFO-BT) ceramics have been studied as a function BT content (x = 0.0, 0.1, 0.2, 0.3). In situ synchrotron x-ray diffraction result BFO reveals rhombohedral (R)–orthorhombic (O)–cubic (C) phase transition near 820 850 °C upon heating. BFO-10%BT BFO-20%BT exhibit R–C 760 740 °C, respectively. A C(R)–C takes place 680 in BFO-30%BT. C(R) represents that minor R coexists the C matrix. local minimum distortion angle αR...
To understand structural and chemical properties of metal–graphene composites, it is crucial to unveil the bonding along interface. We provide direct experimental evidence atomic between typical metal nano structures graphene, agreeing well with density functional theory studies. Single Cr atoms are located in valleys a zigzag edge, few-atom ensembles preferentially form chains by self-assembly. Low migration barriers lead rich dynamics clusters under electron irradiation. demonstrate no...
Electrocaloric properties of [110] and [111] oriented 0.73Pb(Mg1/3Nb2/3)O3-0.27PbTiO3 single crystals were studied in the temperature range 293–423 K. The Maxwell relations Landau–Ginsburg–Devonshire (LGD) phenomenological theory employed as indirect method to calculate electrocaloric properties, while a high-resolution calorimeter was used measure adiabatic change effect (ECE) directly. results indicate that directly measured changes ΔT > 2.5 K at room procured when applied electric...