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Related Experiment Videos

Lanthanum hexaboride for solar energy applications.

Elisa Sani1, Luca Mercatelli2, Marco Meucci2

  • 1CNR-INO National Institute of Optics, Largo E. Fermi, 6, I-50125, Firenze, Italy. elisa.sani@ino.it.

Scientific Reports
|April 8, 2017
PubMed
Summary

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Lanthanum hexaboride (LaB6) shows promise as a solar absorber for Concentrating Solar Power (CSP) systems. This material offers high solar absorbance and spectral selectivity, potentially simplifying thermionic systems.

Area of Science:

  • Materials Science
  • Renewable Energy Engineering
  • Solid State Physics

Background:

  • Concentrating Solar Power (CSP) systems require efficient solar absorbers.
  • Advanced materials are needed to enhance solar energy conversion and system efficiency.
  • Lanthanum hexaboride (LaB6) is explored for its unique optical and thermionic properties.

Purpose of the Study:

  • To investigate the optical properties of LaB6-based materials for CSP applications.
  • To evaluate LaB6 as a solid solar absorber with high spectral selectivity.
  • To assess the potential of LaB6 as a dual-function material in thermionic systems.

Main Methods:

  • Thermally consolidated bulk LaB6 materials via hot pressing.

Related Experiment Videos

  • Measured hemispherical reflectance spectra (UV to mid-infrared) at room temperature.
  • Measured thermal emittance at approximately 1100 K.

    • Main Results:

    • LaB6 exhibits solar absorbance comparable to advanced materials like Silicon Carbide.
    • LaB6 demonstrates superior spectral selectivity compared to current solar absorbers.
    • Experimental data confirms LaB6's suitability as a high-temperature solar absorber and electron source.

    Conclusions:

    • LaB6 is a viable candidate for solid absorbers in Concentrating Solar Power systems.
    • Its high spectral selectivity and thermionic properties offer advantages for system efficiency and complexity reduction.
    • LaB6 presents an innovative material solution for future concentrating solar thermionic systems.