Preparation and thermal stability on non-vacuum high temperature solar selective absorbing coatings

Lei, Hao; Wang, ShuMao; Jiang, Lijun; Liu, Xiaopeng; Li, Hualing; Li, Zhinian

doi:10.1007/s11434-009-0159-6

Cited by 24 publications

(9 citation statements)

References 14 publications

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“…27 Samples annealed in air revealed the presence of W in the surface, whereas the ones annealed in vacuum did not. Air stability at larger temperatures has been reported for TiAl\TiAlN\TiAlON\TiAlO at 600 °C for 1 h, 9 TiAlN\TiAlON\Si 3 N 4 at 600 °C for 2 h, 28 and Mo \AlCrON\AlCrO x at 600 °C for 168 h. 29 Recently, W/SiO 2 / Si 3 N 4 multilayers have shown excellent long-term thermal stability in air at 400 °C. 30 Finally, thermal aging tests in air at temperatures up to 500 °C have been recently reported for SSCs from the Archimede Solar Energy company, exhibiting stability up to 450 °C after 3000 h and degradation after 1000 h at 500 °C.…”

Section: Introductionmentioning

confidence: 99%

“…Samples annealed in air revealed the presence of W in the surface, whereas the ones annealed in vacuum did not. Air stability at larger temperatures has been reported for TiAl\TiAlN\TiAlON\TiAlO at 600 °C for 1 h, TiAlN\TiAlON\Si 3 N 4 at 600 °C for 2 h, and Mo\AlCrON\AlCrO x at 600 °C for 168 h . Recently, W/SiO 2 /Si 3 N 4 multilayers have shown excellent long-term thermal stability in air at 400 °C .…”

Section: Introductionmentioning

confidence: 99%

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Role of Al₂O₃ Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

Céspedes

Rodríguez-Palomo

Salas‐Colera

et al. 2018

ACS Appl. Energy Mater.

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Enhancing the stability of spectrally selective coatings (SSC) at high temperatures in air is necessary to push the concentrated solar power (CSP) technology to the next level. To avoid failures that might not be discovered for years, advanced knowledge of the chemical properties related to the degradation mechanisms with temperature is required. For this purpose, the Mo local environment is investigated here for Mo−Si 3 N 4 and MoSi 2 − Si 3 N 4 nanocomposites SSCs. The atomic short-range order around Mo proves that MoSi 2 is the stable form that appears in high temperature vacuum annealing and that MoO 3 formation is associated with optical degradation in air annealing. Deposition of Al 2 O 3 capping layers with different techniques is found of paramount relevance in the long term performance of MoSi 2 −Si 3 N 4 based SSCs. MoSi 2 −Si 3 N 4 hybrid composite with Al 2 O 3 capping layer shows exceptional functional stability even after 2900 h at 600 °C in air. Antireflective Al 2 O 3 layer synthesized by atomic layer deposition (ALD) shows an extraordinarily efficient protection against oxidation with unprecedented MoSi 2 stability in MoSi 2 −Si 3 N 4 hybrid composite, and optimum long-term optical performance. On the other hand, Al 2 O 3 layer deposited by sputtering blocks the formation of detrimental MoO 3 at 600 °C but allows the formation of MoO 2 in MoSi 2 −Si 3 N 4 for long annealing times which, however, also provides excellent and stable optical functionality related to MoO 2 high stability. KEYWORDS: spectrally selective coating (SSC), concentrated solar power (CSP), solar selective absorbers, high temperature air stability, MoSi 2 −Si 3 N 4 nanocomposite, Al 2 O 3 capping layer, aging

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Role of Al₂O₃ Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

Céspedes

Rodríguez-Palomo

Salas‐Colera

et al. 2018

ACS Appl. Energy Mater.

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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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“…On the other hand, transition metal nitrides and oxynitrides based on structure are characterized by a good diffusion barrier, high resistance of oxidation and thermal stability [6,7,[9][10][11][12][13][14]. Several transition metals were already used, such as, Ti, Cr,W, Nb, Zr and Al [6,7,[9][10][11][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

The effect of increasing Si content in the absorber layers (CrAlSiNx/CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability

AL-Rjoub

Rebouta

Cunha

et al. 2019

Applied Surface Science

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In this work, the effect of increasing Si content in the absorber layers (CrAlSiN x /CrAlSiO y N x) of solar selective absorbers upon their selectivity and thermal stability are studied. The two optical stacks presented consist of four magnetron sputtered layers on stainless steel substrates. In both cases, tungsten is used as back-reflector, CrAlSi x N/CrAlSiO y N x as absorber layers with different Si/(Cr+Al+Si) atomic ratio (0.15 and 0.30, respectively) and finally the SiAlO x antireflection layer. The structures were theoretically designed by SCOUT software depended on experimental transmittance (T) and reflectance (R) of thin single layers deposited on glass substrates. It is observed that optical stack coatings with higher silicon content show better selectivity values, high solar absorptance, α= 95.9%, and low emissivity, ε= 9.7 % (calculated for 400 ºC), with higher thermal stability at 600 ºC in vacuum, for 650 h. Additionally, with the annealing at 600 ºC an increase of surface roughness was found, which was smaller for sample with higher Si content.

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Preparation and thermal stability on non-vacuum high temperature solar selective absorbing coatings

Cited by 24 publications

References 14 publications

Role of Al₂O₃ Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

Role of Al₂O₃ Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

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

The effect of increasing Si content in the absorber layers (CrAlSiNx/CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability

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Preparation and thermal stability on non-vacuum high temperature solar selective absorbing coatings

Cited by 24 publications

References 14 publications

Role of Al2O3 Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

Role of Al2O3 Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

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

The effect of increasing Si content in the absorber layers (CrAlSiNx/CrAlSiOyNx) of solar selective absorbers upon their selectivity and thermal stability

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Role of Al₂O₃ Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

Role of Al₂O₃ Antireflective Layer on the Exceptional Durability of Mo–Si–N-Based Spectrally Selective Coatings in Air at High Temperature

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