A5080896143- Transition Metal Oxide Nanomaterials
- Thermal Radiation and Cooling Technologies
- Gas Sensing Nanomaterials and Sensors
- Radiative Heat Transfer Studies
- Infrared Target Detection Methodologies
- Advanced Antenna and Metasurface Technologies
- Building Energy and Comfort Optimization
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Urban Heat Island Mitigation
- Pigment Synthesis and Properties
- Material Science and Thermodynamics
- Aerogels and thermal insulation
- ZnO doping and properties
- Synthesis and properties of polymers
- Silicone and Siloxane Chemistry
- Photopolymerization techniques and applications
- Material Properties and Applications
- Advanced Aircraft Design and Technologies
- Optical Systems and Laser Technology
- Electromagnetic wave absorption materials
- Constructed Wetlands for Wastewater Treatment
- Advanced Memory and Neural Computing
- Tribology and Wear Analysis
- Phosphorus and nutrient management
Xihua University
2025
University of Electronic Science and Technology of China
2018-2023
National Engineering Research Center of Electromagnetic Radiation Control Materials
2018-2022
Existing smart radiation devices suffer from numerous disadvantages such as large thicknesses, limited dimensions, or requirements for sustained electrical power. The present study addresses these issues by proposing a thermal control coating based on CaF2/VO2 core–shell (CaF2@VO2) structured microspheres prepared solvent/hydrothermal-calcination method and distributed within an easily applied polymer matrix. Here, the dielectric-to-metallic transition property of VO2 shell material with...
High-temperature-resistant coatings with low infrared emissivity were prepared using polysiloxane resin and flake aluminum as the adhesive pigment, respectively. The heat resistance mechanisms of polysiloxane/Al coating systematically investigated. composition, surface morphology, reflectance spectra, thermal expansion dimension (ΔL) characterized by X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), Fourier transform spectroscopy, mechanical...
VO2 has attracted extensive attention as an adaptive camouflage material due to its structural change during the metal-insulator transition (MIT) at 68 °C, which can rapidly respond ambient temperature and actively modulate infrared emissivity. However, thermal instability limited application in optical field. In this paper, VO2@Al2O3 core-shell micronanoparticles (VO2@Al-O) with controllable shell thickness were first prepared by atomic layer deposition method, their stability modulation...
Herein, a low-frequency broadband multilayer metamaterial absorber (MMA) based on resistive frequency selective surfaces (RFSSs) is proposed, which consists of three-layer RFSS, polymethacrylimide (PMI) foam substrates, and copper film. The proposed has the advantages ultra-broadband absorption with absorptivity more than 90% ranging from 1.91 to 20.78 GHz, covers entire S, C, X, Ku bands thickness 0.102λL (where λL corresponds wavelength lowest operating frequency). performance can keep...
A design method of five-band polarization-insensitive metamaterial absorber (MMA) based on the slotted structures and magnetic rubber is proposed for L-, S-, C-, X-, Ku-band applications. The top layer, which evolved from two square rings, are used to excite multi-resonance. range electromagnetic (EM) parameters a substrate, adjust equivalent impedance match free space in different bands, estimated using matching principle. series substrates EM prepared measured, whose thickness only 0.7 mm,...
Abstract The coatings (polysiloxane, flake aluminum, and glass powder) mechanical infrared properties were analyzed in detail. hardness, adhesion, surface roughness, SEM, thermal imager used to evaluate the radiation suppression performance. influences of structure (pigment/adhesive ratio, function filler, solvent content) on emissivity through theory experiment. coating hardness increased as temperature due decomposition adhesive. adhesion analysis showed an “M” type trend functional powder...
The phosphorus resources in our country have accounted for second of the whole world, but it is predicted that recoverable can only be supplied by 2020. However sewage account about 1∼ 2% entire volume waste, contains 90% phosphorus.Electrolysis a promising technology simulated urine treatment,with adding magnesium source.In this way,it doesn't secondary pollution case recovery phosphorus, while reducing pressure on treatment plant. Results show electrochemical feasible, rate increases over...
Abstract In this paper, the influence mechanism of flight speed, altitude and emissivity skin material on temperature aircraft wall were systematically analysed by numerical simulation. The results show that increase velocity would lead to rise pressure aircraft. addition, a speed 5 Ma at 30 km, heat transmitted outside was reduced with decrease emission. As result, constant its own energy, which led continuous And total target radiation emission 58.8% (from 0.8 0.2). These infrared could...
In this paper, radiation spectrum design methods of material were proposed. Effect temperature and atmospheric transmission on the infrared materials was studied. The properties different analyzed at temperature. aircraft surface studied, according to environment transmission. Moreover, two with consistent emissivity Material has less characteristic peak within 3.0−4.3 μm low intensity 8−14 μm, which good spectral stealth 250−450 K. not obvious 4.3−8.0 owing transmittance atmosphere....
VO<sub>2</sub> film is expected to be used in smart radiation devices (SRD) due changes infrared reflection caused by semiconductor-to-metal transition (SMT). In this work, a tunable thermal emitter which consisted of Al layer, CaF<sub>2</sub> layer and was designed achieve variable emittance with temperature. The variation dielectric parameters shell temperature change regulate the absorption characteristics structure, realize positive emittance-switching performance device. It found that...