18 February 2014 Optical properties of boride ultrahigh-temperature ceramics for solar thermal absorbers
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Abstract
It is a known rule that the efficiency of thermodynamic solar plants increases with the working temperature. At present, the main limit in temperature upscaling is the absorber capability to withstand high temperatures. The ideal solar absorber works at high temperatures and has both a low thermal emissivity and a high absorptivity in the solar spectral range. The present work reports on the preparation and optical characterization of hafnium and zirconium diboride ultrahigh-temperature ceramics for innovative solar absorbers operating at high temperature. Spectral hemispherical reflectance from the ultraviolet to the mid-infrared wavelength region and high-temperature hemispherical emittance reveal their potential for high-temperature solar applications. Boride samples are compared with silicon carbide (SiC), a material already used in solar furnaces.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Elisa Sani, Elisa Sani, Mario Meucci, Mario Meucci, Luca Mercatelli, Luca Mercatelli, David Jafrancesco, David Jafrancesco, Jean-Louis Sans, Jean-Louis Sans, Laura Silvestroni, Laura Silvestroni, Diletta Sciti, Diletta Sciti, } "Optical properties of boride ultrahigh-temperature ceramics for solar thermal absorbers," Journal of Photonics for Energy 4(1), 045599 (18 February 2014). https://doi.org/10.1117/1.JPE.4.045599 . Submission:
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