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3. High-temperature optical properties and stability of AlxOy–AlNx–Al solar selective absorbing surface prepared by DC magnetron reactive sputtering

Author

Shi Yueyan, Wang Fengchun, and Shen Yue

Subjects
Auger electron spectroscopy, Materials science, Argon, Renewable Energy, Sustainability and the Environment, Annealing (metallurgy), business.industry, chemistry.chemical_element, Selective surface, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Optics, chemistry, Sputtering, Absorptance, Cavity magnetron, Optoelectronics, Thermal emittance, business
Abstract

AlxOy–AlNx–Al selective absorbing surface was prepared by DC magnetron reactive sputtering with aluminum alloy (LY13) 1 in air and argon. The studies were carried out to access the high-temperature (400°C–600°C) optical properties and stability of the coatings. The coatings were found to withstand heating at 600°C for 30 min in 4.5×10−3 Pa vacuum with absorptance 0.94 and emittance 0.07 after annealing. After heating at 450°C for 10 h, the specimen still had good performance whose absorptance and emittance was 0.93 and 0.07, respectively. Auger electron spectroscopy was used to analyse the structure of the solar selective surface before and after annealing.

Published
2003

4. Studies on the emittance of stainless steel surface

Author

Shi Yueyan, Yin Zhiqiang, and Jun Qian

Subjects
Surface (mathematics), Engineering, Electromagnetic theory, Optics, Physics::Instrumentation and Detectors, Renewable Energy, Sustainability and the Environment, business.industry, Ideal surface, Thermal emittance, Physics::Classical Physics, business
Abstract

The surface of the stainless steel (1Crl8Ni9Ti) was finished by means of the electrochemical method. The emittances of the polished specimens were measured. The operating condition of the nearly lowest emittance was obtained. The theoretical results of the ideal surface of the stainless steel were calculated with the electromagnetic theory. A good agreement between experimental and theoretical values was observed.

Published
1996

8. Electrochromic properties of NiO[sub x]H[sub y] thin films.

Author

Shi Yueyan, Zhou Zhiyang, and Yang Xiaoji

Subjects
*NICKEL compounds, *THIN films, *ELECTROCHROMIC devices
Abstract

NiO[sub x]H[sub y] films were prepared by DC magnetron sputtering in H[sub 2]/O[sub 2] atmosphere. NiO[sub x]H[sub y] coatings with transparency and high electrochromic efficiency were obtained by changing H2 content. A 60nm thick NiO[sub x]-H[sub y] film with transmittance of 0.57 (as-deposited state), 0.78 (bleached state) and 0.24 (coloured state) at wavelength of 550nm was deposited in an atmosphere of H[sub 2](60%) + O[sub 2](40%). Analysis of infrared spectra (6000∼2400cm[sup -l]) showed that the absorption peaks for bleached and colored states are associated with free 'OH' and OH stretching vibrations, respectively. XPS Ni2p core level spectra of colored NiO[sub x]H[sub y], film exhibited a peak at 856.2±0.2eV which is attributed to Ni[sup 3+]. Ni2p core level spectra of the bleached and as-deposited films exhibited two peaks at 856.4±0.2 and 854.6±0.2eV which are attributed to Ni[sup 3+] and Ni[sup 2+]. [ABSTRACT FROM AUTHOR]

Published
2002
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