Optical properties of boride ultrahigh-temperature ceramics for solar thermal absorbers

Elisa Sani; Mario Meucci; Luca Mercatelli; David Jafrancesco; Jean-Louis Sans; Laura Silvestroni; Diletta Sciti

doi:10.1117/1.JPE.4.045599

18 February 2014 Optical properties of boride ultrahigh-temperature ceramics for solar thermal absorbers

Elisa Sani, Mario Meucci, Luca Mercatelli, David Jafrancesco, Jean-Louis Sans, Laura Silvestroni, Diletta Sciti

Author Affiliations +

Journal of Photonics for Energy, Vol. 4, Issue 1, 045599 (February 2014). https://doi.org/10.1117/1.JPE.4.045599

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.

Citation Download Citation

Elisa Sani, Mario Meucci, Luca Mercatelli, David Jafrancesco, Jean-Louis Sans, Laura Silvestroni, and 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

Published: 18 February 2014

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