Titanium diboride ceramics for solar thermal absorbers

Year: 2017

Authors: Sani E., Meucci M., Mercatelli L., Balbo A., Musa C., Licheri R., Orrù R., Cao G.

Autors Affiliation: CNR-INO National Institute of Optics, Largo E. Fermi, 6, I-50125 Firenze, Italy; Corrosion and Metallurgy Study Centre “Aldo Daccò”, Engineering Department, University of Ferrara, G. Saragat 4a, Ferrara 44122, Italy; ISTEC-CNR, Institute of Science and Technology for Ceramics, Via Granarolo 64, Faenza 48018, Italy; Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Unità di Ricerca del Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali(INSTM), Università degli Studi di Cagliari, Piazza D′Armi, 09123 Cagliari, Italy

Abstract: Titanium diboride (TiB2) is a low-density refractory material belonging to the family of ultra-high temperature ceramics (UHTCs). This paper reports on the production and microstructural and optical characterization of nearly fully dense TiB2, with particular interest to its potential utilization as novel thermal solar absorber. Monolithic bulk samples are produced starting from elemental reactants by a two-step method consisting of the Self-propagating High-temperature Synthesis (SHS) followed by the Spark Plasma Sintering (SPS) of the resulting powders. The surface of obtained samples has-been characterized from the microstructural and topological points of view. The hemispherical reflectance spectrum has been measured from 0.3 to 15 gm wavelength, to evaluate the potential of this material as solar absorber for future concentrating solar plants.


Volume: 169      Pages from: 313  to: 319

More Information: This activity has been carried out in the framework of the FIRB2012-SUPERSOLAR (Programma \”Futuro in Ricerca\”, prot. RBFR12TIT1) project funded by the Italian Ministry of Education, University and Research. E. S. gratefully acknowledges the Italian bank foundation \”Fondazione Ente Cassa di Risparmio di Firenze\” within the framework of the \”SOLE-NANO\” project (pratica n. 2015.0861). Thanks are also due to Mr. Massimo D
KeyWords: Borides; Ceramic materials; Cermets; Characterization; Electromagnetic wave propagation in plasma; Optical properties; Sintering; Spark plasma sintering; Titanium, Concentrating solar; Hemispherical reflectance; Optical characterization; Self-propagating high temperature synthesis; Solar thermal absorbers; Thermal solar absorbers; TiB2; Ultra-high-temperature ceramics, Solar absorbers
DOI: 10.1016/j.solmat.2017.05.038

Citations: 62
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