A5102759562- Dielectric materials and actuators
- Ferroelectric and Piezoelectric Materials
- Advanced Sensor and Energy Harvesting Materials
- Multiferroics and related materials
- High voltage insulation and dielectric phenomena
- Electromagnetic wave absorption materials
- Acoustic Wave Resonator Technologies
- Synthesis and properties of polymers
- Conducting polymers and applications
- Advanced Materials and Mechanics
- Polymer Surface Interaction Studies
- Microwave Dielectric Ceramics Synthesis
- Planarian Biology and Electrostimulation
- Magnetic and transport properties of perovskites and related materials
- Neuroscience and Neural Engineering
- Polymer composites and self-healing
- Bone Tissue Engineering Materials
- Electrospun Nanofibers in Biomedical Applications
- Electronic and Structural Properties of Oxides
- Calcium Carbonate Crystallization and Inhibition
Tsinghua University
2012-2025
State Key Laboratory of New Ceramics and Fine Processing
2012-2025
University of Science and Technology Beijing
2010-2022
Hubei Polytechnic University
2017
Dielectric materials with high electric energy densities and low dielectric losses are of critical importance in a number applications modern electronic electrical power systems. An organic–inorganic 0–3 nanocomposite, which nanoparticles (0‐dimensional) embedded 3‐dimensionally connected polymer matrix, has the potential to combine breakdown strength loss constant ceramic fillers, representing promising approach realize densities. However, one significant drawback composites explored up now...
Physiological electric potential is well-known for its indispensable role in maintaining bone volume and quality. Although implanted biomaterials simulating structural, morphological, mechanical, chemical properties of natural tissue or organ has been introduced the field regeneration, concept restoring physiological microenvironment remains ignored design. In this work, a flexible nanocomposite membrane mimicking endogenous fabricated to explore defect repair efficiency. BaTiO3...
By using Bi2O3-doped Ba0.3Sr0.7TiO3 (BSBT) fibers prepared via electrospinning and modified by dopamine as dielectric fillers, BSBT/P(VDF-TrFE) flexible nanocomposites are fabricated solution casting. A low loading of BSBT nanofibers leads to a large increase in the constant breakdown strength. In particular, discharged energy density is significantly enhanced several times comparison with pure polymer matrix. The strength could be attributed combined effects surface modification, aspect...
Interfacial polarization contributes significantly to the electric displacement of polymer nanocomposites and results in large energy density.
A novel sandwich-structured polymer-based nanocomposite with different dielectric fillers stacked together was fabricated employing a layer-by-layer casting process. In the composite poly(vinylidene fluoride)-based film, outer layer TiO2 nanoparticles increased electric displacement while central paraelectric BaSrTO3 nanofibers maintained high breakdown strength. Compared single films, extractable energy density greatly enhanced in film. Instead of solely being stored at interface between...
Polyimide (PI) films with extremely high breakdown strength (451 kV/mm), energy density (5.2 J/cm3), and discharge efficiency (86.7%) at the room temperature are fabricated by simple solution casting method. Barium titanate (BaTiO3) nanoparticles introduced into PI matrix, giving rise to enhanced dielectric permittivity (6.8) low loss (0.012). Dielectric storage performances of BTO/PI nanocomposites thoroughly investigated up 200 °C. The strengths both pure decrease dramatically increase in...
A zero thermal expansion and multiferroic compound 0.8PbTiO(3)-0.2Bi(Ni(1/2)Ti(1/2))O(3) was developed by a chemical modification route. The structure studies showed that the tetragonality of (1 - x)PbTiO(3)-xBi(Ni(1/2)Ti(1/2))O(3) gradually weakened to cubic introducing dopant Bi(Ni(1/2)Ti)(1/2)O(3), coefficient changed from -8.81 x 10(-6)/degrees C 8.46 in 0.1 < or = 0.3 around wide temperature range (from RT about 500 degrees C). Weak ferromagnetic behavior observed solid solutions,...
Flexible dielectric composites with high permittivity have been extensively studied due to their potential applications in high-density energy capacitors. In this review, effects of interface characteristics on the properties polymer-based nanocomposites are analyzed. The classified into two types: dielectric–dielectric (DD, ceramic particle-polymer) and conductor–dielectric (CD, conductive composites. It is highly desirable for exhibit at low content particles, which requires a remarkable...
Nanocomposite films with cerium oxide (CeO2) nanoparticles as functional fillers and polystyrene (PS) polymer matrix were prepared using solution casting method. Physical properties including both weak frequency dependence of dielectric permittivity low loss experimentally discovered in the CeO2/PS nanocomposite films. To improve further, surface CeO2 was treated by H2O2 to increase homogeneity film, which confirmed scanning electron microscopy (SEM) results. Furthermore, it found that...
Polydopamine@AgNPs (PDA@AgNPs) core–satellite particles were fabricated by self-polymerization of dopamine and <italic>in situ</italic> reduction Ag<sup>+</sup> on the as-formed PDA surface.
High-TC piezoelectric (1−x)PbTiO3xBiScO3 shows a nonmonotonic trend of TC in the tetragonal phase with respect to content BiScO3. To understand this behavior, structure solid solutions is studied by means neutron powder diffraction. The cation displacements Pb/Bi and Ti/Sc exhibit coupling property different impact substitution Its quantitatively related calculated spontaneous polarization whole range. unique role Bi-substitution not only contributes enhance component but also increase TC.
Al-doped PbTiO3 solid solutions were synthesized by a state method. Since Al does not have bonding d-orbit or d-electrons, and the substitutions of Al(3+) for Ti(4+) in is aliovalent, effect on structure spontaneous polarization quite different from that Hf, Zr, etc. PbTiO3. Usually, weakened with decreased tetragonality PbZrxTi1-xO3 PbHfxTi1-xO3 systems; PbTi1-xAlxO3 (0 ≤ x 0.10) exhibit improved (c/a). Lattice dynamics crystal enhanced investigated FT-IR, Raman scattering technique, X-Ray...
A series of solid solutions (1−x−y)PbTiO3-xBi(Ni1/2Ti1/2)O3-yBiScO3 were prepared to search for a high performance multifunctional ceramic material. Through contents tailoring, compound at the morphotropic phase boundary 0.50PT-0.30BNT-0.20BS was found, which displays excellent ferroelectric and piezoelectric properties. The mechanical performances, hardness fracture toughness highly compact are superior among similar piezoceramics, its thermal stability is great. durability material...
Abstract The interest in soft elastomers has been revived because they are needed the emerging robotics and wearable devices. It is imperative to adjust mechanical properties of elastomeric materials for real‐life applications as well develop an approach construct more complex customized architectures. In this study, embedded extrusion‐based three‐dimensional (3D) printing method was used prepare silicone composites. Cellulose nanocrystals were introduced tailor rheology ink serve...