A novel TiC-TiN based spectrally selective absorbing coating: Structure, optical properties and thermal stability

Zhao, Shuai-Sheng; Gao, Xiang‐Hu; Qiu, Xiao‐Yang; Yu, Dongmei; Tian, Guangke

doi:10.1016/j.infrared.2020.103471

Cited by 26 publications

(6 citation statements)

References 37 publications

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“…The spectral selectivity (α/ε) of the Al 0.4 Hf 0.6 NbTaTiZrN-based SSAC is 14.547. The Al 0.4 Hf 0.6 NbTaTiZrN-based SSAC shows enhanced absorptance in a broad wavelength from 300 to 1500 nm while maintaining great selectivity. , …”

Section: Resultsmentioning

confidence: 99%

“…6 N b T a T i Z r N ( H M V F ) / Al 0.4 Hf 0.6 NbTaTiZrN(LMVF) coating, the cutoff wavelength, shows enhanced absorptance in a broad wavelength from 300 to 1500 nm while maintaining great selectivity. 16,25 Thermal Stability and Solar−Thermal Conversion Efficiency. A series of thermal stability tests with various temperatures are carried out to study the high-temperature resistance of the as-deposited coating in a low-vacuum atmosphere.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Nanometer-Thick High-Entropy Alloy Nitride Al_0.4Hf_0.6NbTaTiZrN-Based Solar Selective Absorber Coatings

Zhao

Qiu

et al. 2021

ACS Appl. Nano Mater.

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Solar selective absorber coatings (SSACs), with the characteristics of efficient harvesting and conversion of solar energy into the heat work fluid, are considered to be one of the key components for the concentrating solar power (CSP) system. In this work, a nanometer-thick high-entropy alloy nitride Al 0.4 Hf 0.6 NbTaTiZrN-based SSAC is successfully deposited. The as-deposited coating exhibits a high solar absorptance (0.931) and a low emittance (0.064), which produces a high solar−thermal conversion efficiency (η solar-th = 77.4%) at 1000 K black-body radiation. The thermal stability test indicates that significant degradation of the coating appears in the range of 293−773 K, but the absorptance reaches up to 0.917 when the annealing temperature increases to 873 K. The optical properties, microstructure, element distribution, and the detailed failure mechanism of these nanometer-thick coatings are comprehensively studied. All these merits endow the proposed Al 0.4 Hf 0.6 NbTaTiZrN-based solar absorber coatings with a potential application in solar energy harvesting.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Nanometer-Thick High-Entropy Alloy Nitride Al_0.4Hf_0.6NbTaTiZrN-Based Solar Selective Absorber Coatings

Zhao

Qiu

et al. 2021

ACS Appl. Nano Mater.

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“…The radiation delivered to the absorber is described in detail later in this section. The parameters of the selective coating used for the analysis correspond to the TiC-TiN/Al 2 O 3 coating [37]. Therminol VP-1 was chosen as the heat transfer fluid.…”

Section: Inlet Outletmentioning

confidence: 99%

Study of Twisted Tape Inserts Segmental Application in Low-Concentrated Solar Parabolic Trough Collectors

et al. 2023

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This article presents the results of an analysis of heat enhancement intensification using twisted tapes in linear absorbers for low-concentration parabolic trough collectors, a technology frequently considered as a supplementary energy source for industrial heat production. This contribution proposes a segmented application of different twisted tapes to intensify heat absorption. A 33.7 mm tubular absorber placed in the collector focal point with an aperture of 1.8 m was selected. The temperature range of the heat transfer fluid was chosen at 60–250 °C. The impact of inserts with twisted ratios of 1, 2 and 4 on system operation was analysed using the Ansys Fluent and mathematical model. The models used were validated based on experimental results from a parabolic trough collector with solar simulator test bench. The results indicated that for the range of mass flow between 0.15–0.3 kg/s, the most optimal is applying twisted ratio 1, except for the highest-temperature section. In this section, it is more optimal to use an insert with a twisted ratio 2, due to the lower need for pumping and the higher efficiency increment. The long-term analysis for the case study plant indicated that the proposed approach increased power gain by 0.27%.

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“…Titanium carbides, nitrides, oxides, and their solid solutions (TiC, TiN, Ti(C, N, O)) are the leading advanced engineering ceramics that can be used in metal-working, electrical and electronic, automotive, chemical, and refractory industries [1][2][3][4][5], due to their special properties such as low density, high melting points, and hardness, hightemperature strength retention, good conductivity, excellent oxidation and wear resistance, and low thermal expansion coefficient in coating and thin films [6]. Titanium carbide can also be used as catalytical and electrochemical material [7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ti(C, N, O) from TiO2 by CH4-H2-N2 Gas Mixture at Low Temperature

Fan

Hou

Huang

et al. 2021

Preprint

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Titanium carbides, oxides, nitrides and carbonitrides possess many special and excellent properties. But the high production cost caused by the traditional carbothermic reduction process severely limits the wide applications. In this study, a novel synthesis process has been proposed by reducing and carbonitriding TiO2 with CH4-H2-N2 gas mixture at low temperatures. The synthesis of Ti(C, N, O), reaction mechanism and the products composition have been investigated. Thermodynamic analysis indicated that TiO2 could be ultimately reduced and carbonitrided to Ti(C, N, O) by CH4-H2-N2 gas mixture. Based on the predictions of thermodynamics, the effects of reduction time, temperature, and gas composition have been studied experimentally. The obtained results indicated that increasing reduction temperature and introduction of N2 are beneficial to the synthesis of Ti(C, N, O). Finally, the optimum reaction conditions have been obtained. The density functional theory (DFT) results further demonstrated the reaction mechanism. This work provides a new approach to prepare metallic carbonitrides from their oxides.

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A novel TiC-TiN based spectrally selective absorbing coating: Structure, optical properties and thermal stability

Cited by 26 publications

References 37 publications

Nanometer-Thick High-Entropy Alloy Nitride Al_0.4Hf_0.6NbTaTiZrN-Based Solar Selective Absorber Coatings

Nanometer-Thick High-Entropy Alloy Nitride Al_0.4Hf_0.6NbTaTiZrN-Based Solar Selective Absorber Coatings

Study of Twisted Tape Inserts Segmental Application in Low-Concentrated Solar Parabolic Trough Collectors

Synthesis of Ti(C, N, O) from TiO2 by CH4-H2-N2 Gas Mixture at Low Temperature

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A novel TiC-TiN based spectrally selective absorbing coating: Structure, optical properties and thermal stability

Cited by 26 publications

References 37 publications

Nanometer-Thick High-Entropy Alloy Nitride Al0.4Hf0.6NbTaTiZrN-Based Solar Selective Absorber Coatings

Nanometer-Thick High-Entropy Alloy Nitride Al0.4Hf0.6NbTaTiZrN-Based Solar Selective Absorber Coatings

Study of Twisted Tape Inserts Segmental Application in Low-Concentrated Solar Parabolic Trough Collectors

Synthesis of Ti(C, N, O) from TiO2 by CH4-H2-N2 Gas Mixture at Low Temperature

Contact Info

Product

Resources

About

Nanometer-Thick High-Entropy Alloy Nitride Al_0.4Hf_0.6NbTaTiZrN-Based Solar Selective Absorber Coatings

Nanometer-Thick High-Entropy Alloy Nitride Al_0.4Hf_0.6NbTaTiZrN-Based Solar Selective Absorber Coatings