Design and fabrication of highly thermally stable HfMoN/HfON/Al2O3 tandem absorber for solar thermal power generation applications

Selvakumar, N.; Manikandanath, NT; Biswas, A.; Barshilia, Harish C.

doi:10.1016/j.solmat.2012.03.021

Cited by 83 publications

(41 citation statements)

References 25 publications

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“…[3][4][5][6]8,9,20,[30][31][32][33][34] Spectrally selective behaviour of transition metal nitride lms have been previously studied. 10 Studies of magnetron sputtered TiAlN/ TiAlON lms synthesized onto a metal substrate exhibited high absorptance and low emittance were reported by Barshilia et al 5 The absorptance of the lms was substantially enhanced to 0.95 by adding a Si 3 N 4 anti-reective coating on the top of these lms.…”

Section: -29mentioning

confidence: 99%

“…Various types of metal nitrides based selective solar surfaces such as TiN, ZrN, HfN, TiAlN, TiAlON, NbAlN, NbAlON, MoAlN, and WAlN have been investigated by numerous groups. [1][2][3][4][5][6][7][8][9][10][11] Over the past few years, transition metal nitride based thin lms have attracted signicant research interest as selective solar surfaces in solar thermal conversion devices. Generally, the energy conversion performance of a selective solar surface depends on the lm materials, lm design and fabrication technique used.…”

Section: Introductionmentioning

confidence: 99%

“…13 However, these materials are yet to be commercialized for solar energy conversion applications. 3,9,14 In solar selective surface applications, transition metal oxides based thin lms also received signicant research interests.…”

Section: Introductionmentioning

confidence: 99%

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Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered Ti_xM_1−x−yN_yfilms

et al. 2016

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steel substrates via closed field unbalanced magnetron sputtering technology. These were investigated using XRD, SEM, XPS, UV-Vis, FTIR and nanoindentation techniques. Analysis of the optical properties showed the solar absorptance, in the visible range, of the Ti x M 1ÀxÀy N y films improved significantly from 51% to 81% with AlSi-doping and an increase of solar absorptance of up to 66% was recorded from films doped with Al. Moreover, the Al doping can reduce the thermal emittance in the infrared range from 6.06% to 5.11%, whereas doping with AlSi reduces the emittance to ca. 3.58%. The highest solar selectivity of 22.63 was achieved with TiAlSiN films. Mechanical studies showed enhanced hardness by $32%; enhanced yield strength by $16% and enhanced plastic deformation by $110% of Al and AlSi doped TiN matrix. IntroductionA spectrally selective surface is, generally, used to improve the photothermal conversion performance and, as such, it possesses two characteristics: high absorptance, a in the visible region of solar spectrum (0.3 to 2.5 mm) and low emittance, 3, (i.e., high reection) in the infra-red (IR) region ($2.5 mm) at operating temperatures. An excellent selective surface maximises the absorption of incoming photons in the visible region and minimises photon emission through thermal radiation in the IR energy region. Such a surface can be designed by an absorber-reector assembly. In such an approach, the reector is coated with a highly absorbing layer over the visible solar spectrum, while the infrared region is made transparent. Various types of metal nitrides based selective solar surfaces such as TiN, ZrN, HfN, TiAlN, TiAlON, NbAlN, NbAlON, MoAlN, and WAlN have been investigated by numerous groups.1-11 Over the past few years, transition metal nitride based thin lms have attracted signicant research interest as selective solar surfaces in solar thermal conversion devices. Generally, the energy conversion performance of a selective solar surface depends on the lm materials, lm design and fabrication technique used. A multi-layer lm stack with mixture of metal nitride, metal oxide and metal oxynitride lms e.g., TiAlN/AlON, and TiAl/ TiAlN/TiAlON/TiAlO has been explored for the potential commercial development of selective solar surfaces.3,12 TiAlN/ TiAlON/Si 3 N 4 selective absorbers have been produced on various substrates such as copper, nickel, stainless steel, glass and nimonic alloys.13 However, these materials are yet to be commercialized for solar energy conversion applications. View Article OnlineView Journal | View Issue solar selective surface applications, transition metal oxides based thin lms also received signicant research interests. 15-19Various synthesis methods such as evaporation, electrodeposition, chemical conversion, chemical vapour deposition and magnetron sputtering have been employed in manufacturing selective solar surfaces. Owing to its advantages in large area deposition, dry, clean and environment friendly, magnetron sputtering technique is widely used for syn...

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Section: -29mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered Ti_xM_1−x−yN_yfilms

et al. 2016

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“…At present, there are several coatings that have been used as solar selective absorbers for high-temperature operation of PTC: Pt-Al 2 [4,[6][7][8][9][10]. In addition, the solar absorber Ni-5Al has attracted considerable attention as a solar selective coating for concentrating solar radiation at high operating temperatures [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Ni–Al coating thickness on spectral selectivity and thermal performance of parabolic trough collector

Suriwong

Bunmephiphit

Wamae

et al. 2018

Mater Renew Sustain Energy

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This study investigates the influence of Ni-Al coating thickness on the spectral selectivity and thermal performance of a parabolic trough collector (PTC). Three thicknesses of Ni-Al coating for use as solar absorber material were successfully prepared on the outer surface of a stainless steel 316L (SS) tube by flame spray. The phase, morphology, and reflectance (R) of the Ni-Al coatings were characterized using several techniques. The PTC and solar receiver tube were specially designed and constructed for observing the collector thermal performance by following ASHRAE . Looking at the results, the actual average thicknesses of the three Ni-Al coatings turn out to be 195, 215, and 299 μm. The morphology and chemical composition of all three thicknesses are similar. The chemical composition in the cross-sectional view exhibits non-uniform distribution. The three thicknesses of the coating are composed of NiO and Al 2 O 3 phases, which also corresponded to the results of SEM-EDX mapping. The differences in a solar absorptance (α) of the three thicknesses of Ni-Al coating are not statistically significant, with an average α value of 0.74-0.75. However, there are differences in thermal efficiency of the PTC depending on the thickness of the Ni-Al coating. Of the three samples, the thickest one (299 µm) demonstrates the highest ability to convert solar radiation into thermal energy.

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“…, Mo-SiO2 [8], W-Al2O3 [9], Zr-ZrO3 [10], HfMoN/HfON/Al2O3 [11], AlNi-Al2O3 [12], Ag-Al2O3 [13], NbTiON/SiON [14], TiAlN/TiAlON/Si3N4 [15 …”

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confidence: 99%

Absorption Rate Variation of TiNO<sub>x</sub>/Ti/Al Films Depending on N<sub>2</sub> Gas Flow Rate

Kim¹,

Jang²,

Kim³

2015

Journal of the Korean Institute of Electrical and Electronic Ma

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Ti was deposited on the Al substrate using DC magnetron sputtering with changing the N2 gas for the possible application of a solar absorbing layer. N2 gas ranged from 50 to 75 sccm was systematically applied in the 5 sccm interval and the variation of the absorption rate was investigated. Microstructural examination and elemental analysis indicate that Ti was reacted with N2 gas and formed TiNOx compound. As compared with the film without any exposure of N2 gas, absorption rate improved by more than 20%. Typically the average absorption of TiNOx fim with 65% of N2 gas was about 99% in the visible range, and the average absorption was more than 90% in the infrared absorption region respectively.

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Design and fabrication of highly thermally stable HfMoN/HfON/Al2O3 tandem absorber for solar thermal power generation applications

Cited by 83 publications

References 25 publications

Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered Ti_xM_1−x−yN_yfilms

Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered Ti_xM_1−x−yN_yfilms

Influence of Ni–Al coating thickness on spectral selectivity and thermal performance of parabolic trough collector

Absorption Rate Variation of TiNO<sub>x</sub>/Ti/Al Films Depending on N<sub>2</sub> Gas Flow Rate

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Design and fabrication of highly thermally stable HfMoN/HfON/Al2O3 tandem absorber for solar thermal power generation applications

Cited by 83 publications

References 25 publications

Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered TixM1−x−yNyfilms

Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered TixM1−x−yNyfilms

Influence of Ni–Al coating thickness on spectral selectivity and thermal performance of parabolic trough collector

Absorption Rate Variation of TiNO<sub>x</sub>/Ti/Al Films Depending on N<sub>2</sub> Gas Flow Rate

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Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered Ti_xM_1−x−yN_yfilms

Chemical bonding states and solar selective characteristics of unbalanced magnetron sputtered Ti_xM_1−x−yN_yfilms