Infrared stealth nanofibrous composite with thermal stability and mechanical flexibility

Fang, K.Y.; Zhao, Yusen; Fang, Fei

doi:10.1016/j.jallcom.2020.157418

Cited by 11 publications

(8 citation statements)

References 36 publications

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“…However, there is no research on the use of heavy rare earth ions Er-doped SnO 2 in the field of infrared and laser compatible stealth. Due to the advantages of large surface area, light weight and high porosity, micro-nanofibers have great potential application value in the field of compatible stealth materials [24,25], which is more in line with the current development trend of lightweight stealth materials. First-principles calculations are an important way to study the microscopic electronic interaction mechanism of materials.…”

Section: Introductionmentioning

confidence: 71%

Research on Infrared Emissivity and Laser Reflectivity of Sn1−xErxO2 Micro/Nanofibers Based on First-Principles

Xia¹,

Xia²,

Zhao³

et al. 2023

Journal of Renewable Materials

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Sn 1−x Er x O 2 (x = 0%, 8%, 16%, 24%) micro/nanofibers were prepared by electrospinning combined with heat treatment using erbium nitrate, stannous chloride and polyvinylpyrrolidone (PVP) as raw materials. The target products were characterized by thermogravimetric analyzer, X-ray diffrotometer, fourier transform infrared spectrometer, scanning electron microscope, spectrophotometer and infrared emissivity tester, and the effects of Er 3+ doping on its infrared and laser emissivity were studied. At the same time, the Sn 1−x Er x O 2 (x = 0%, 16%) doping models were constructed based on the first principles of density functional theory, and the related optoelectronic properties such as their energy band structure, density of states, reflectivity and dielectric constant were analyzed, and further explained the mechanism of Er 3+ doping on SnO 2 infrared emissivity and laser absorption from the point of electronic structure. The results showed that after calcination at 600°C, single rutile type SnO 2 was formed, and the crystal structure was not changed by doping Er 3+ . The calcined products showed good fiber morphology, and the average fiber diameter was 402 nm. The infrared emissivity and resistivity of the samples both decreased first and then increased with the increase of Er 3+ doping amount. When x = 16%, the infrared emissivity of the sample was at least 0.71; and Er 3+ doping can effectively reduce the reflectivity of SnO 2 at 1.06 μm and 1.55 μm, when x = 16%, its reflectivity at 1.06 μm and 1.55 μm are 50.5% and 40%, respectively, when x = 24%, the reflectivity at 1.06 μm and 1.55 μm wavelengths are 47.3% and 42.1%, respectively. At the same time, the change of carrier concentration and electron transition before and after Er 3+ doping were described by firstprinciple calculation, and the regulation mechanism of infrared emissivity and laser reflectivity was explained. This study provides a certain experimental and theoretical basis for the development of a single-type, light-weight and easily prepared infrared and laser compatible-stealth material.

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Section: Introductionmentioning

confidence: 71%

Research on Infrared Emissivity and Laser Reflectivity of Sn1−xErxO2 Micro/Nanofibers Based on First-Principles

Xia¹,

Xia²,

Zhao³

et al. 2023

Journal of Renewable Materials

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“…The object with a higher temperature than that of the background can be easily detected by a thermal infrared camera, according to the Stefan–Boltzmann law W = εσ T , wherein W is the emission energy, ε is the infrared emissivity, σ is the constant of Stefan–Boltzmann, and T is the absolute temperature. , Therefore, metal materials with low infrared emissivity and high infrared reflectance like Al and Ag and thermal insulative materials able to decrease the absolute temperature are often employed for infrared stealth or infrared camouflage. Unfortunately, the high density and the melting behavior at high temperatures of metals restrict their independent applications, thereby metal foils or plates are always combined with porous thermal insulative materials for the purpose of both lightweight and temperature reduction. − Distinctive from the current strategies with rigid materials, our flexible and thermal insulative PRF/SPRA was combined with an Al panel with a thickness of 0.2 mm for both complanate and conformable infrared camouflage.…”

Section: Results and Discussionmentioning

confidence: 99%

Lightweight, Flexible, and Covalent-Bonding Phenolic Fabric Reinforced Phenolic Ablator for Thermal Insulation and Conformal Infrared Stealth

Huang,

Li,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Generally speaking, for a specific material, the sum of absorptivity, reflectivity and transmissivity is 1. 69,70 MAMs need to ensure high absorptivity and low reflectivity, and infrared stealth materials need to provide low absorptivity and high reflectivity. Although they appear to be contradictory, there is a possibility that they are compatible because of different acting interfaces.…”

Section: Bionic Metamaterials System Designmentioning

confidence: 99%

Bionic structures for optimizing the design of stealth materials

Xu¹,

Li²,

Li³

et al. 2023

Phys. Chem. Chem. Phys.

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Infrared stealth nanofibrous composite with thermal stability and mechanical flexibility

Cited by 11 publications

References 36 publications

Research on Infrared Emissivity and Laser Reflectivity of Sn1−xErxO2 Micro/Nanofibers Based on First-Principles

Research on Infrared Emissivity and Laser Reflectivity of Sn1−xErxO2 Micro/Nanofibers Based on First-Principles

Lightweight, Flexible, and Covalent-Bonding Phenolic Fabric Reinforced Phenolic Ablator for Thermal Insulation and Conformal Infrared Stealth

Bionic structures for optimizing the design of stealth materials

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