A5012674336- Ferroelectric and Piezoelectric Materials
- Microstructure and mechanical properties
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- Acoustic Wave Resonator Technologies
- Advanced materials and composites
- Aluminum Alloys Composites Properties
- Dielectric materials and actuators
- Geology and Paleoclimatology Research
- Dielectric properties of ceramics
- Aluminum Alloy Microstructure Properties
- Paleontology and Stratigraphy of Fossils
- Dental materials and restorations
- Bone Tissue Engineering Materials
- Advanced Memory and Neural Computing
- Isotope Analysis in Ecology
- Intermetallics and Advanced Alloy Properties
- Advanced ceramic materials synthesis
- Endodontics and Root Canal Treatments
- Photorefractive and Nonlinear Optics
- Metallic Glasses and Amorphous Alloys
- Microstructure and Mechanical Properties of Steels
- Ion-surface interactions and analysis
- nanoparticles nucleation surface interactions
- Advanced Materials Characterization Techniques
Hubei University
2013-2025
Tsinghua University
2023-2024
State Key Laboratory of New Ceramics and Fine Processing
2023-2024
École Polytechnique Fédérale de Lausanne
2021-2023
Erich Schmid Institute of Materials Science
2016-2020
Austrian Academy of Sciences
2016-2020
Piezoelectric ceramics, as essential components of actuators and transducers, have captured significant attention in both industrial scientific research. The "entropy engineering" approach has been demonstrated to achieve excellent performance lead-based materials. In this study, the was employed introduce morphotropic phase boundary (MPB) into bismuth ferrite (BF)-based lead-free system. By employing strategy, a serial novel "medium high entropy" piezoelectric ceramics were successfully...
Relaxor ferroelectrics are highly desired for pulse-power dielectric capacitors, however it has become a bottleneck that substantial enhancements of energy density generally sacrifice efficiency under superhigh fields. Here, we demonstrate novel concept polarizable concentrated dipole glass in delicately-designed high-entropy (Bi
Ceramic capacitors with ultrahigh power density are crucial in modern electrical applications, especially under high-temperature conditions. However, the relatively low energy limits their application scope and hinders device miniaturization integration. In this work, we present a high-entropy BaTiO3-based relaxor ceramic outstanding storage properties, achieving substantial recoverable of 10.9 J/cm3 superior efficiency 93% at applied electric field 720 kV/cm. Of particular importance is...
Lead-free BiFeO3-based (BF) materials with colossal spontaneous polarization and high Curie temperatures exhibit considerable potential for groundbreaking developments in dielectric capacitors. However, their inherent limitations, such as restricted breakdown strength (Eb) pronounced remanent polarization, critically restrict advancements energy storage capabilities. Herein, we achieve an exceptional recoverable density of 12.2 J cm−3 impressive efficiency 90.1% via the strategic design a...
Dielectric ceramics with high energy storage performance are crucial for the development of advanced high-power capacitors. However, achieving ultrahigh recoverable density and efficiency remains challenging, limiting progress leading-edge applications. In this study, (Bi1/2Na1/2)TiO3 (BNT) is selected as matrix, effects different A-site elements on domain morphology, lattice polarization, dielectric ferroelectric properties systematically investigated. Mg, La, Ca, Sr shown to enhance...
Oxygen isotope compositions of fossil foraminifera tests are commonly used proxies for ocean paleotemperatures, with reconstructions spanning the last 112 million years. However, isotopic composition these calcitic can be substantially altered during diagenesis without discernible textural changes. Here, we investigate fluid-mediated exchange in pristine three modern benthic species (Ammonia sp., Haynesina germanica, and Amphistegina lessonii) following immersion into an 18O-enriched...
Abstract BiCuSeO is a promising oxygen‐containing thermoelectric material due to its intrinsically low lattice thermal conductivity and excellent service stability. However, the electrical limits performance. Aliovalent element doping can significantly improve their carrier concentration, but it may also impact mobility transport properties. Considering influence of graphene on carrier‐phonon decoupling, Bi 0.88 Pb 0.06 Ca CuSeO (BPCCSO)‐graphene composites are designed. For further...
Dielectric capacitors with high energy storage performance are highly desired for advanced power electronic devices and systems. Even though strenuous efforts have been dedicated to closing the gap of density between dielectric electrochemical capacitors/batteries, a single-minded pursuit without near-zero loss ultrahigh efficiency as grantee is in vain. Herein, purpose decoupling inherent conflicts polarization low electric hysteresis (loss), achieving simultaneously multilayer ceramic...
Light elements play a crucial role on the microstructure and properties of conventional alloys steels. Oxygen is one light which inevitably introduced into nanocrystalline during manufacturing. Here, we report that severe plastic deformation can fragment oxides formed in powder processing eventually cause oxygen dissolution matrix. A comparative investigation Cu-Fe generated from different initial materials, blended powders arc-melted bulk materials have contents, reveals fragmented at grain...
[(K 0.43 Na 0.57 ) 0.94 Li 0.06 ][(Nb Sb 0.95 Ta 0.05 ]O 3 + x mol% Fe 2 O ( KNLNST Fe, = 0~0.60) lead‐free piezoelectric ceramics were prepared by conventional solid‐state reaction processing. The effects of small‐amount doping on the microstructure and electrical properties systematically investigated. With increasing 3+ content, orthorhombic‐tetragonal polymorphic phase transition temperature T O‐T presented an obvious “V” type variation trend, was successfully shifted to near room...
Ceramics show brittle nature because of ionic and covalent bondings. However, the need for reliable high-power applications with vibrational displacements under high electric fields stress loadings demands robust piezoelectric ceramics. In this work, three series Lead Zirconium Titanate-based ceramics are synthesized via solid solution reaction technique. The microstructures phases manipulated by doping different rare-earth oxides Nd2O3, Dy2O3 Yb2O3. Although all as-sintered a perovskite...
Normally immiscible 57 wt% Cu–43 Cr compounds were mechanically alloyed by means of high pressure torsion with large and controllable strains. A strain-saturated state in bulk was achieved after 100 rotations deformation (effective strain 1360), a stable grain size 13.7 nm largest solubility 32 Cu matrix. The phase fraction change between face-centered cubic body-centered due to dissolution during continuous captured accurately calculated, indicating negative exponential mode....
Abstract The oxygen isotopic compositions of fossil foraminifera tests constitute a continuous proxy record deep-ocean and sea-surface temperatures spanning the last 120 million years. Here, by incubating in 18 O-enriched artificial seawater analogues, we demonstrate that composition optically translucent, i.e., glassy, calcite can be measurably altered at low through rapid grain-boundary diffusion without any visible ultrastructural changes. Oxygen grain boundary occurs sufficiently fast...
Ceramic capacitors are ubiquitously used in high power and pulse applications, but their low energy density, especially at temperatures (>150 °C), limits fields of application. One the reasons is efficiency under electric and/or temperatures. In this work, equimolar Sm3+ Ti4+ cations were doped NaNbO3 to increase relaxor characteristics storage properties. The optimal recoverable density Wrec 6.5 J/cm3 η 96% attained ceramics with 10% (Sm, Ti) concentration (SmT10). Dense...
We report the thermal stability of supersaturated CuCr nanocrystallines alloys at atomic resolution using modern spherical aberration-corrected transmission electron microscopy (TEM) via performing in-situ structural and spectroscopy experiments. It is found that are not only subjected to a change but also undergo chemical evolution upon annealing. Chemical destabilization occurs quite low temperature. Heating triggers rapid separation Cu Cr grains forced intermixing zone, accompanied by an...