Enhanced thermal stability of the TiB2–ZrB2 composite ceramic based high temperature spectrally selective absorber coatings: Optical properties, failure analysis and chromaticity investigation

Qiu, Xiao‐Yang; Gao, Xiang‐Hu; He, Cheng‐Yu; Liu, Gang

doi:10.1016/j.optmat.2020.109666

Cited by 22 publications

(14 citation statements)

References 42 publications

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“…The reflectance of the stack can be further reduced by depositing an appropriate dielectric film as the anti‐reflection layer over the top 51,52 . Al 2 O 3 is one of the widely used anti‐reflection layers in spectrally selective absorber coatings 17,23,31,52 . Due to the considerable difference in the refractive indices between the absorbing layer and air, there will be a reflection loss at the interface.…”

Section: Discussionmentioning

confidence: 99%

“…51,52 Al 2 O 3 is one of the widely used anti-reflection layers in spectrally selective absorber coatings. 17,23,31,52 Due to the considerable difference in the refractive indices between the absorbing layer and air, there will be a reflection loss at the interface. To minimize the top surface reflection loss, an appropriate dielectric coating, whose refractive index is close to that of air, must be deposited on the top.…”

Section: Rationalizing Solar Selectivity By a Gradient In The Refractive Index Of Ss/nbb 2 /Nb(bno)/al 2 Omentioning

confidence: 99%

“…[19][20][21] Also, these borides were combined with metals and dielectrics and fabricated into multilayer solar selective coatings. 16,18,22,23 These reports suggest that transition metal-based borides (TMBs) are suitable materials for solar absorbers.…”

Section: Introductionmentioning

confidence: 99%

“…The possible application of bulk borides, such as ZrB 2 , HfB 2 , TaB 2 , TiB 2 , and LaB 6 , have been reported lately 19–21 . Also, these borides were combined with metals and dielectrics and fabricated into multilayer solar selective coatings 16,18,22,23 . These reports suggest that transition metal‐based borides (TMBs) are suitable materials for solar absorbers.…”

Section: Introductionmentioning

confidence: 99%

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Probing the spectrally selective property of NbB₂‐based tandem absorber coating for concentrated solar power application

2021

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Solar selective coating with good thermal stability is the primary requirement for a concentrated solar power (CSP) plant to function with better photothermal efficiency. In recent years, ultra-high-temperature ceramic-based coatings have been explored as potential materials for solar selective coatings. In this context, NbB 2 /Nb(BN)/Al 2 O 3 tandem absorber coating was designed to be fabricated on a stainless-steel substrate by the radio frequency magnetron sputtering of spark plasma sintered ceramic target. In the bulk form, the NbB 2 ceramic exhibits high solar absorptance (α = 0.756) and thermal emissivity (ε = 0.43), whereas the amorphous single NbB 2 coating exhibits α/ε = 0.716/0.13. Reactive sputtering of NbB 2 in nitrogen produced a semi-transparent coating with an optical bandgap of ∼2.80 eV and was used as the secondary absorber layer. Raman and X-ray photoelectron spectroscopy analyses reveal mild oxygen incorporation in the absorber layers. The developed SS/NbB 2 /Nb(BNO)/Al 2 O 3 tandem absorber exhibits a good solar absorptance of 0.950 and a moderate thermal emissivity of 0.15 at room temperature. The coatings exhibited good thermal stability when heated in vacuum for 5 h up to 700 • C, and the selectivity (α/ε) remains above 6. The present work shows the possibility of exploring NbB 2 -based tandem absorber coatings for CSP applications.

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Section: Discussionmentioning

confidence: 99%

Section: Rationalizing Solar Selectivity By a Gradient In The Refractive Index Of Ss/nbb 2 /Nb(bno)/al 2 Omentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Probing the spectrally selective property of NbB₂‐based tandem absorber coating for concentrated solar power application

2021

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“…Metal borides show interesting optical properties in the ultraviolet (UV) and infrared (IR) regions of the spectrum . The metal-boride films/coatings and nanostructures are majorly investigated as absorbing materials (as UV filters, solar thermal absorbers) , and window panels (to absorb IR radiation and transmit visible light) . Metal-boride-derived 2D nanostructures derived from MgB 2 were found to exhibit strong UV absorption with an optical band gap of 4.49 eV (contrast to parent MgB 2 , because it shows two energy band gaps of 2.2–2.8 meV and 7.2 meV) with an absorptivity of 2.9 mL mg –1 cm –1 at a wavelength of 200 nm .…”

Section: Superconductivity In Metal-boride Nanosheetsmentioning

confidence: 99%

Progress, Challenges, and Opportunities in the Synthesis, Characterization, and Application of Metal-Boride-Derived Two-Dimensional Nanostructures

Gunda

Klebanoff

Sharma

et al. 2021

ACS Materials Lett.

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Two-dimensional (2D) metal-boride-derived nanostructures have been a focus of intense research for the past decade, with an emphasis on new synthetic approaches, as well as on the exploration of possible applications in next-generation advanced materials and devices. Their unusual mechanical, electronic, optical, and chemical properties, arising from low dimensionality, present a new paradigm to the science of metal borides that has traditionally focused on their bulk properties. This Perspective discusses the current state of research on metalboride-derived 2D nanostructures, highlights challenges that must be overcome, and identifies future opportunities to fully utilize their potential.

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High‐Entropy Photothermal Materials

He,

Li,

Zhou

et al. 2024

Advanced Materials

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High‐entropy (HE) materials, celebrated for their extraordinary chemical and physical properties, have garnered increasing attention for their broad applications across diverse disciplines. The expansive compositional range of these materials allows for nuanced tuning of their properties and innovative structural designs. Recent advances have been centered on their versatile photothermal conversion capabilities, effective across the full solar spectrum (300‐2500 nm). The HE effect, coupled with hysteresis diffusion, imparts these materials with desirable thermal and chemical stability. These attributes position HE materials as a revolutionary alternative to traditional photothermal materials, signifying a transformative shift in photothermal technology. This review delivers a comprehensive summary of the current state of knowledge regarding HE photothermal materials, emphasizing the intricate relationship between their compositions, structures, light‐absorbing mechanisms, and optical properties. Furthermore, the review outlines the notable advances in HE photothermal materials, emphasizing their contributions to areas such as solar water evaporation, personal thermal management, solar thermoelectric generation, catalysis, and biomedical applications. The review culminates in presenting a roadmap that outlines prospective directions for future research in this burgeoning field, and also outlines fruitful ways to develop advanced HE photothermal materials and to expand their promising applications.This article is protected by copyright. All rights reserved

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Enhanced thermal stability of the TiB2–ZrB2 composite ceramic based high temperature spectrally selective absorber coatings: Optical properties, failure analysis and chromaticity investigation

Cited by 22 publications

References 42 publications

Probing the spectrally selective property of NbB₂‐based tandem absorber coating for concentrated solar power application

Probing the spectrally selective property of NbB₂‐based tandem absorber coating for concentrated solar power application

Progress, Challenges, and Opportunities in the Synthesis, Characterization, and Application of Metal-Boride-Derived Two-Dimensional Nanostructures

High‐Entropy Photothermal Materials

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Enhanced thermal stability of the TiB2–ZrB2 composite ceramic based high temperature spectrally selective absorber coatings: Optical properties, failure analysis and chromaticity investigation

Cited by 22 publications

References 42 publications

Probing the spectrally selective property of NbB2‐based tandem absorber coating for concentrated solar power application

Probing the spectrally selective property of NbB2‐based tandem absorber coating for concentrated solar power application

Progress, Challenges, and Opportunities in the Synthesis, Characterization, and Application of Metal-Boride-Derived Two-Dimensional Nanostructures

High‐Entropy Photothermal Materials

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Product

Resources

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Probing the spectrally selective property of NbB₂‐based tandem absorber coating for concentrated solar power application

Probing the spectrally selective property of NbB₂‐based tandem absorber coating for concentrated solar power application