The synthesis and characterization of Al/Co 3 O 4 magnetic composite pigments with low infrared emissivity and low lightness

Liu, Yunfeng; Xie, Jianliang; Luo, Ming; Shuai, Jian; Peng, Bo; Deng, Longjiang

doi:10.1016/j.infrared.2017.04.014

Cited by 24 publications

(4 citation statements)

References 20 publications

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“…[14][15][16][17] Among these candidate metal oxides, cobalt-based oxides are well known because of the structured and electronic properties of spinel type oxides with variable valence states (Co 2+ /Co 3+ ) as well as the lower bonding energy of Co-O bonds, which exhibit high activity for catalytic combustion of lean methane. 18 Therefore, the cobalt-based catalysts have extensive applications in sensors, 19 lithium-ion batteries, 20 magnetic materials, 21 pigments 22 and solar cells, 23 which also show high activity for the oxidation of CH 4 , CO and VOCs due to their high redox ability and strong oxygen mobility. 24,25 It is well known that the catalytic performance of catalysts is closely related to its structure and properties, which strongly depends on the catalyst synthesis method and the types of catalyst precursors.…”

Section: Introductionmentioning

confidence: 99%

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Zheng

Zhou

et al. 2020

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Zheng

Zhou

et al. 2020

RSC Adv.

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“…The comparison results are shown in Figure (detailed optical properties have been summarized in Table S1). ,,− Also, the camouflage properties of metal and semiconductor films are placed in the picture for contrast. It can be seen that our result is found to be superior to that of reported works with the lowest IR emissivity and lowest visible reflectivity.…”

Section: Results and Discussionmentioning

confidence: 99%

Nanostructured Ge/ZnS Films for Multispectral Camouflage with Low Visibility and Low Thermal Emission

Deng

Qin

et al. 2022

ACS Appl. Nano Mater.

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Multispectral camouflage technology against advanced detection has attracted rising attention in recent years. However, compatible camouflage with low visibility and low thermal emission in a dark background still remains challenging (such as satellites, high-altitude planes, etc.). In this work, a low visibility and low thermal emission nanostructured film with electromagnetic band gap for multispectral camouflage is proposed. The structure demonstrates a Ge/ZnS multilayer for suppressing thermal emission, which is mounted with nanolayered dielectric antireflection stacks to absorb visible light. Also, the all-dielectric configuration ensures microwave transmission for being compatible with microwave camouflage. The fabricated structure shows low reflectance (3.95%) for 300–1100 nm visible-near-IR light, low emissivity for 3–5 μm (0.043) and 8–14 μm (0.093) atmospheric window ranges, and high transmittance (98.86%) for 8–18 GHz microwave range. Moreover, the film exhibits low lightness and suppressed thermal radiation signatures with incident angles up to 60°. The proposed nanostructured Ge/ZnS film paves the way for multispectral camouflage and other applications such as solar–thermal conversion, radiation control, and optical sensing based on electromagnetic wave manipulation.

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“…Metal powders such as Al, Zn, Cu and Ni are often used as low-IR-emissivity pigments [ 29 , 30 , 31 ] for their high reflectivity, hence small absorption and low emissivity. Al powders are very frequently used owing to their low cost and low density [ 29 , 30 , 31 , 32 , 33 ]. In this work, graphene and Al powders are added to epoxy resin coatings to perform the functions of anticorrosion and low-emissivity pigment, respectively.…”

Section: Introductionmentioning

confidence: 99%

Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings

et al. 2021

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Corrosion prevention and infrared (IR) stealth are conflicting goals. While graphene nanosheets (GN) provide an excellent physical barrier against corrosive agent diffusion, thus lowering the permeability of anti-corrosion coatings, they have the side-effect of decreasing IR stealth. In this work, the anti-corrosion properties of 100-μm-thick composite epoxy coatings with various concentrations (0.01–1 wt.%) of GN fillers thermally reduced at different temperatures (300 °C, 700 °C, 1100 °C) are first compared. The performance was characterized by potentiodynamic polarization scanning, electrochemical impedance spectroscopy, water contact angle and salt spray tests. The corrosion resistance for coatings was found to be optimum at a very low filler concentration (0.05 wt.%). The corrosion current density was 4.57 × 10−11 A/cm2 for GN reduced at 1100 °C, showing no degradation after 500 h of salt-spray testing: a significant improvement over the anti-corrosion behavior of epoxy coatings. Further, to suppress the high IR thermal signature of GN and epoxy, Al was added to the optimized composite at different concentrations. The increased IR emissivity due to GN was not only eliminated but was in fact reduced relative to the pure epoxy. These optimized coatings of Al-GN-epoxy not only exhibited greatly reduced IR emissivity but also showed no sign of corrosion after 500 h of salt spray test.

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The synthesis and characterization of Al/Co 3 O 4 magnetic composite pigments with low infrared emissivity and low lightness

Cited by 24 publications

References 20 publications

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Nanostructured Ge/ZnS Films for Multispectral Camouflage with Low Visibility and Low Thermal Emission

Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings

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The synthesis and characterization of Al/Co 3 O 4 magnetic composite pigments with low infrared emissivity and low lightness

Cited by 24 publications

References 20 publications

Combustion of lean methane over Co3O4 catalysts prepared with different cobalt precursors

Combustion of lean methane over Co3O4 catalysts prepared with different cobalt precursors

Nanostructured Ge/ZnS Films for Multispectral Camouflage with Low Visibility and Low Thermal Emission

Using Graphene-Based Composite Materials to Boost Anti-Corrosion and Infrared-Stealth Performance of Epoxy Coatings

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Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors

Combustion of lean methane over Co₃O₄ catalysts prepared with different cobalt precursors