High temperature optically stable spectrally-selective Ti1-xAlxN-based multilayer coating for concentrated solar thermal applications

M. Bilokur; A. R. Gentle; M. D. Arnold; M. B. Cortie; G. B. Smith

doi:10.1016/j.solmat.2019.109964

High temperature optically stable spectrally-selective Ti_1-xAl_xN-based multilayer coating for concentrated solar thermal applications

M. Bilokur, A. R. Gentle, M. D. Arnold, M. B. Cortie^*, G. B. Smith

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

Spectrally-selective solar absorbing coatings based on the Ti_1-xAl_xN system were deposited using DC magnetron sputtering. Due to their refractory nature and very suitable optical properties, these were considered for high temperature solar thermal energy conversion. The composition of Ti_1-xAl_xN, (effectively, the Ti/Al ratio) was optimized to achieve a maximized solar absorptance. The optimum composition was then tested in a tandem absorber which included anti-reflective layers. A stainless steel substrate was used in order to simulate service in parabolic trough-based power plants that use stainless steel pipe to carry the heat-transfer fluid. High temperature annealing of the stack caused structural modifications but the solar absorptance of 92% was retained even after annealing at 900 °C.

Original language	English
Article number	109964
Journal	Solar Energy Materials and Solar Cells
Volume	200
DOIs	https://doi.org/10.1016/j.solmat.2019.109964
Publication status	Published - 15 Sept 2019
Externally published	Yes

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10.1016/j.solmat.2019.109964

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title = "High temperature optically stable spectrally-selective Ti1-xAlxN-based multilayer coating for concentrated solar thermal applications",

abstract = "Spectrally-selective solar absorbing coatings based on the Ti1-xAlxN system were deposited using DC magnetron sputtering. Due to their refractory nature and very suitable optical properties, these were considered for high temperature solar thermal energy conversion. The composition of Ti1-xAlxN, (effectively, the Ti/Al ratio) was optimized to achieve a maximized solar absorptance. The optimum composition was then tested in a tandem absorber which included anti-reflective layers. A stainless steel substrate was used in order to simulate service in parabolic trough-based power plants that use stainless steel pipe to carry the heat-transfer fluid. High temperature annealing of the stack caused structural modifications but the solar absorptance of 92% was retained even after annealing at 900 °C.",

keywords = "Solar absorbers, Solar thermal conversion, Spectrally selective coatings, Stacks, Thermal stability, Titanium aluminium nitride",

author = "M. Bilokur and Gentle, {A. R.} and Arnold, {M. D.} and Cortie, {M. B.} and Smith, {G. B.}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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doi = "10.1016/j.solmat.2019.109964",

language = "English",

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T1 - High temperature optically stable spectrally-selective Ti1-xAlxN-based multilayer coating for concentrated solar thermal applications

AU - Bilokur, M.

AU - Gentle, A. R.

AU - Arnold, M. D.

AU - Cortie, M. B.

AU - Smith, G. B.

PY - 2019/9/15

Y1 - 2019/9/15

N2 - Spectrally-selective solar absorbing coatings based on the Ti1-xAlxN system were deposited using DC magnetron sputtering. Due to their refractory nature and very suitable optical properties, these were considered for high temperature solar thermal energy conversion. The composition of Ti1-xAlxN, (effectively, the Ti/Al ratio) was optimized to achieve a maximized solar absorptance. The optimum composition was then tested in a tandem absorber which included anti-reflective layers. A stainless steel substrate was used in order to simulate service in parabolic trough-based power plants that use stainless steel pipe to carry the heat-transfer fluid. High temperature annealing of the stack caused structural modifications but the solar absorptance of 92% was retained even after annealing at 900 °C.

AB - Spectrally-selective solar absorbing coatings based on the Ti1-xAlxN system were deposited using DC magnetron sputtering. Due to their refractory nature and very suitable optical properties, these were considered for high temperature solar thermal energy conversion. The composition of Ti1-xAlxN, (effectively, the Ti/Al ratio) was optimized to achieve a maximized solar absorptance. The optimum composition was then tested in a tandem absorber which included anti-reflective layers. A stainless steel substrate was used in order to simulate service in parabolic trough-based power plants that use stainless steel pipe to carry the heat-transfer fluid. High temperature annealing of the stack caused structural modifications but the solar absorptance of 92% was retained even after annealing at 900 °C.

KW - Solar absorbers

KW - Solar thermal conversion

KW - Spectrally selective coatings

KW - Stacks

KW - Thermal stability

KW - Titanium aluminium nitride

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DO - 10.1016/j.solmat.2019.109964

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JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

M1 - 109964

ER -

High temperature optically stable spectrally-selective Ti_1-xAl_xN-based multilayer coating for concentrated solar thermal applications

Abstract

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