Ni-Al2O3 selective cermet coatings for photothermal conversion up to 500°C

Sathiaraj, T.S.; Thangaraj, R.; Sharbaty, H. Al; Bhatnagar, M.C.; Agnihotri, O.P.

doi:10.1016/0040-6090(89)90914-0

Cited by 35 publications

(32 citation statements)

References 16 publications

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“…Yue et al [4] reported that Al x O y -AlN x -Al selective absorbers deposited on quartz substrates exhibited good thermal stability up to 600 1C in vacuum. Ni-Al 2 O 3 cermet coatings deposited on molybdenumcoated nickel-plated stainless steel were stable up to 500 1C in air [5]. For practical applications, copper (Cu) is an ideal substrate because of its high thermal conductivity (401 W/mK) and low emittance (0.03).…”

Section: Introductionmentioning

confidence: 99%

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Optical properties and thermal stability of pulsed-sputter-deposited AlxOy/Al/AlxOy multilayer absorber coatings

Barshilia

Selvakumar

Vignesh

et al. 2009

Solar Energy Materials and Solar Cells

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Section: Introductionmentioning

confidence: 99%

“…A large number of Al 2 O 3 -based solar selective coatings have been studied for high-temperature applications [3][4][5][6][7][8]. Most of the coatings studied at temperatures above 400 1C have been deposited on quartz, stainless steel, molybdenum (Mo) and superalloy substrates.…”

Section: Introductionmentioning

confidence: 99%

Optical properties and thermal stability of pulsed-sputter-deposited AlxOy/Al/AlxOy multilayer absorber coatings

Barshilia

Selvakumar

Vignesh

et al. 2009

Solar Energy Materials and Solar Cells

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“…RF magnetron sputtering was used to prepare Ni-Al 2 O 3 cermet films by Sathiaraj et al 21,22 . The metal fractions of the cermet layers were varied by using targets with different compositions and by co-sputtering the As a comparison, the reflectance spectrum of the as-deposited film is also included (dashed curve).…”

Section: Spectral Selectivity Of Cermet-based Absorbersmentioning

confidence: 99%

A review of cermet-based spectrally selective solar absorbers

Cao

McEnaney

Chen

et al. 2014

Energy Environ. Sci.

427

285

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Spectrally-selective solar absorbers harvest solar energy in the form of heat. Solar absorbers using cermet-based coatings demonstrate a high absorptance of the solar spectrum and a low emittance in the infrared (IR) regime. Extensive work has been done to optimize cermet-based solar absorbers to achieve high performance by exploring different cermet (ceramic-metal composite) materials and film configurations through different preparation techniques such as electrodeposition, sputtering, pulsed laser deposition, and solution-based methods. In this article, we review the progress of cermet-based spectrally-selective absorbers with high solar absorptance and low thermal emittance, such as Cr 2 O 3 , Al 2 O 3 , AlN, SiO 2 , and ZrO 2 based cermets as absorption layers. We also present an outlook for cermet-based spectrally-selective absorbers with high thermal stability and high conversion efficiency from sunlight to heat.

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“…Among the listed selective absorbers, metaldielectric composites and semiconductor-metal tandems have similar thermal conversion efficiencies at temperatures higher than 700 K [8,31]. One-dimensional aperiodic multilayer PhCs follow closely behind, but have more complex structures [32].…”

Section: Selective Solar Absorbermentioning

confidence: 99%

“…Previously, a graded concentration of metal particles was proposed to improve solar absorption within the cermet by gradually increasing the refractive index of each cermet layer [30]. A single layer of graded Ni/Al 2 O 3 on stainless steel was reported to have an averaged solar absorptance of 94%, and an averaged thermal emittance of only 7% at 773 K [31]. It is also proposed that for Al sp -AlON (Al sputtered in AlON binder) cermet solar absorber, a tenlayer graded cermet can be simplified as a double-layer cermet, yielding 86% thermal transfer efficiency at 1 sun illumination and a temperature of 353 K [8].…”

Section: Metal-dielectric Composite Selective Solar Absorbersmentioning

confidence: 99%

Solar thermophotovoltaics: reshaping the solar spectrum

et al. 2016

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Abstract:Recently, there has been increasing interest in utilizing solar thermophotovoltaics (STPV) to convert sunlight into electricity, given their potential to exceed the Shockley-Queisser limit. Encouragingly, there have also been several recent demonstrations of improved systemlevel efficiency as high as 6.2%. In this work, we review prior work in the field, with particular emphasis on the role of several key principles in their experimental operation, performance, and reliability. In particular, for the problem of designing selective solar absorbers, we consider the trade-off between solar absorption and thermal losses, particularly radiative and convective mechanisms. For the selective thermal emitters, we consider the tradeoff between emission at critical wavelengths and parasitic losses. Then for the thermophotovoltaic (TPV) diodes, we consider the trade-off between increasing the potential short-circuit current, and maintaining a reasonable opencircuit voltage. This treatment parallels the historic development of the field, but also connects early insights with recent developments in adjacent fields. With these various components connecting in multiple ways, a system-level end-to-end modeling approach is necessary for a comprehensive understanding and appropriate improvement of STPV systems. This approach will ultimately allow researchers to design STPV systems capable of exceeding recently demonstrated efficiency values.

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Ni-Al2O3 selective cermet coatings for photothermal conversion up to 500°C

Cited by 35 publications

References 16 publications

Optical properties and thermal stability of pulsed-sputter-deposited AlxOy/Al/AlxOy multilayer absorber coatings

Optical properties and thermal stability of pulsed-sputter-deposited AlxOy/Al/AlxOy multilayer absorber coatings

A review of cermet-based spectrally selective solar absorbers

Solar thermophotovoltaics: reshaping the solar spectrum

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