Nb-NbN Cermet Film as Solar Selective Coating

Abstract:

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A new cermet film Nb-NbN, deposited on the stainless steel substrate by direct reactive magnetron sputtering, was reported as solar selective absorptive coating. Some fundamental studies on microstructure and optical properties of the Nb-NbN cermet films were carried out by XRD, EDX, SEM and spectrophotometer. A solar absorptivity of 0.94 and a normal emissivity of 0.16 at room temperature were achieved for the coating. Thermal stability was investigated at 350°C and 500°C and it was observed that the absorptivity was changed in a range from 0.92 to 0.94 and the surface emissivity varied firstly from 0.16 to 0.14 and then increasing to 0.19 when the temperature was increased from room temperature to 350°C and up to 500°C.

Info:

Periodical:

Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee

Pages:

899-904

DOI:

10.4028/www.scientific.net/AMR.26-28.899

Citation:

C. Wang et al., "Nb-NbN Cermet Film as Solar Selective Coating", Advanced Materials Research, Vols. 26-28, pp. 899-904, 2007

Online since:

October 2007

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Price:

$35.00

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