A5101841588- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Dielectric materials and actuators
- Electromagnetic wave absorption materials
- Multiferroics and related materials
- Advanced Sensor and Energy Harvesting Materials
- Dielectric properties of ceramics
- Magnetic Properties and Synthesis of Ferrites
- Advanced Antenna and Metasurface Technologies
- Advanced ceramic materials synthesis
- Nuclear materials and radiation effects
- Laser and Thermal Forming Techniques
- Advanced Materials and Mechanics
- Metallurgy and Material Forming
- Advanced Battery Materials and Technologies
- Metamaterials and Metasurfaces Applications
- Metal Forming Simulation Techniques
- Photonic Crystals and Applications
- Thermal properties of materials
- Electronic and Structural Properties of Oxides
- High voltage insulation and dielectric phenomena
- Acoustic Wave Resonator Technologies
- Ionic liquids properties and applications
- Microwave and Dielectric Measurement Techniques
- Electrical and Thermal Properties of Materials
Xi'an Jiaotong University
2010-2020
Aerospace Research Institute of Materials and Processing Technology
2020
Nanchang University
2013-2015
Ministry of Education of the People's Republic of China
2015
China XD Group (China)
2015
Mold Community Hospital
2008
Polyacrylamide hydrogels containing salt as electrolyte have been used highly stretchable transparent electrodes in flexible electronics, but those are easy to dry out due water evaporation. Targeted, we try enhance retention capacity of polyacrylamide hydrogel by introducing hydratable salts into the hydrogel. These show enhanced different level. Specially, high content lithium chloride can retain over 70% its initial even environment with relative humidity only 10% RH. The excellent...
Surface modification on ceramic fillers is of interest to help improve their compatibility in ceramic/polymer nanocomposites and, if possible, control the influence modifiers performance nanocomposites. In this paper, four kinds small-molecule were chosen treat surface BT nanoparticles, and PVDF-based filled with modified nanoparticles prepared. The influences compatibility, permittivity, breakdown strength polarization have been systematically investigated order identify optimal modifier...
ABSTRACT A soft ionic conductor can serve as an artificial nerve in muscle. polyacrylamide hydrogel is synthesized containing a hygroscopic salt, lithium chloride. Two layers of the are used conductors to sandwich dielectric elastomer and fabricate highly stretchable transparent actuator. When two hydrogels subject voltage, actuator reduces its thickness expands. An areal strain 134% demonstrated. The voltage‐strain curves calculated by using model that accounts for elastic constraint...
We report improved electric breakdown strength, high energy density, and low dielectric loss of nanocomposites using surface modified BaTiO3 (BT) nanoparticles filling in poly(vinylidene fluoride) polymer matrix. Dielectric properties the have been investigated as a function BT content. The strength 285 MV/m has achieved at nanocomposite with 10 vol. % nanoparticles. results indicate that functionalized produced passivation layers on ceramic fillers can improve homogeneity nanocomposites,...
Hydrogels containing electrolyte can work as ionic conductors to actuate dielectric elastomer (DE) artificial muscles. Based on a popular design of circular actuator, we study theoretically and experimentally the cyclic performance acrylic DE actuators with solid hydrogel electrodes. The viscoelasticity electrodes constrains maximum strain that is attainable for one cycle triangular voltage, it also diminishes accumulated increment after many cycles loadings.
A polymer composite was prepared by embedding fillers made of self-passivated aluminum particles in two kind sizes, micrometer size and nanometer with different volume proportions into polyvinylidene fluoride matrix. The thermal conductivity dielectric properties the were studied. results showed that composites significantly increased to 3.258 W/mK when proportion Al is at 20:1, also relative permittivity about 75.8 1 MHz. effective simulation model values good accordance experimental results.
Interface engineered BaTiO₃/SrTiO₃ heterostructures were epitaxially grown on (001) MgO substrates by pulsed laser deposition. Microstructural characterizations X-ray diffraction and transmission electron microscopy indicate that the as-grown are c-axis oriented with sharp interfaces. The interface relationships between substrate multilayered structures determined to be [001](SrTiO₃)//[001](BaTiO₃)//[001](MgO) (100)(SrTiO₃)//(100)(BaTiO₃)//(100)(MgO). high-frequency microwave (∼18 GHz)...
A nanocomposite was prepared by embedding Ba0.6Sr0.4TiO3 (BST)/silver core/shell nanoparticles (BST@Ag) into polyvinylidene-fluoride (PVDF). Through functionalizing the surface of BST silver coating, relative permittivity composites significantly increased to 153 at 100 Hz which is 73% higher than that composite making untreated nanoparticals. The loss tangent still low (less 0.2) when filler content BST@Ag 0.55. Increasing conductivity interlayer between and PVDF enhances space charge...
Fluorocarboxylic acid, as a novel surface modifier for BT nanoparticles, has significantly improved the performance of BT/PVDF composites.
The Ba0.6Sr0.4TiO3 (BST)/poly(methyl methacrylate) (PMMA) tunable composites in 1-3-type structure consisting of BST rods low-permittivity PMMA matrix are fabricated by dice and fill technique. For the composite containing 41.6vol% BST, permittivity loss tangent 1212 0.026 at 10kHz, respectively, while dielectric tunability is about 36% under 16kV∕cm dc bias flied. theoretical agreement with experimental data. BST/PMMA can meet device requirement for dielectrics high low permittivity.
The (1− x ) BaMoO 4 – TiO 2 ( = 0.0, 0.2, 0.3, 0.338, 0.4, 0.5, 0.66) ceramics were synthesized by the conventional mixed‐oxide process. sintering behaviors, phase composition, chemical compatibility with silver, and microwave dielectric properties of pure 0.662 –0.338 ceramic H 3 BO CuO addition studied. Infrared reflectivity spectra (0.2 ≤ 0.4) composites measured in range 50–4500 cm −1 at room temperature. X ‐ray diffraction analysis reveals that scheelite rutile coexist each other 1275°C...
High permittivity and low‐loss SrTiO 3 /Ni 0.8 Zn 0.2 Fe 2 O 4 (STO/NZO) composites with concrete‐like morphology were prepared through hybrid processing route. The dielectric properties in the low‐frequency range (100 Hz–1 MHz) follow rule of Maxwell–Wagner interfacial polarization. magnetic high‐frequency (10 MHz–1 GHz) exhibit a well integration low losses. STO/NZO show good loss to microwave‐frequency range. results that this kind magnetic–dielectric can be used communications for...
Direct flexoelectric effect was investigated in a non-ferroelectric composite (Bi1.5Zn0.5)(Zn0.5Nb1.5)O7/Ag (BZN/Ag) where the structure symmetry permits no macro-piezoelectricity. The coefficient of BZN/Ag approaches 0.17 μC/m at room temperature. This value is 3–4 orders magnitude higher than those common dielectrics. Our research confirms existence insulated materials except for ferroelectric relaxors.
Dielectrics used for energy storage are highly desired power electronics and pulse applications the polymer capacitors main commercial ones available. The development of flexible wearable devices require relative materials being flexible. Besides, high temperature resistance is also because rising demand large electricity under elevated temperature. dielectrics but with relatively low working normally less than 100 °C. Therefore, fabricating a dielectric material to satisfy flexibility...
The coexistence of Li 2 MoO 4 ( LMO ) and Ni 0.5 Zn Fe O NZO has been proven their low‐temperature‐sintered magneto‐dielectric composites (1− x – (volume fraction factor = 0.1, 0.3, 0.5, 0.7) were prepared by the conventional solid‐state reaction method sintered below 700°C. It is found that optimal sample 0.5) good relatively stable performance in frequency range from 10 MHz to 1 GHz with permittivity between 7.14 6.84, dielectric loss tangent 0.09 0.02, permeability 5.23 3.30, magnetic...
Ba 0.6 Sr 0.4 TiO 3 (BST)/poly(methyl methacrylate) (PMMA) composites with 0–3, 1–3, and 2–2 type structures were prepared studied. The effect of composite on the dielectric properties BST/PMMA was comprehensively investigated by both theoretical experimental methods. 1–3 shows highest permittivity tunability, while 0–3 show lower as well tunabilities. experimentally measured are in agreement theoretically calculated values. results help understanding tailoring ceramic–polymer choosing a...
Ni0.5Zn0.5Fe2O4 (NZO)/epoxy composites with 1–3-type structure consisting of NZO rods in an epoxy matrix were fabricated by the dice and fill technique, volume fraction from 40% to 70%. Improved frequency stability dielectric magnetic properties was obtained range 10 MHz 1 GHz. The optimized composite sample 60% showed high performance permittivity between 9.2 10.3, loss 0.09 0.25 50 GHz, permeability 5.3 5.6, 0.02 0.54 respectively. Moreover, its μ' increased 170%, tan δμ reduced only 80%...
A three-phase composite with SrTiO3 (STO) ultrafine particles and NiZn ferrite (NZO) embedded in a polypropylene (PP) matrix was fabricated by using simple low-temperature hot-pressing technique. The dielectric property magnetic of the as-prepared composites were investigated details, as well thermal stability. results indicate that volume ceramic fillers is fixed, increasing ratio STO phase to NZO phase, permittivities losses increase while initial permeabilities decrease. cut-off...