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Optical properties of dense zirconium and tantalum diborides for solar thermal absorbers

  Articoli su Riviste JCR/ISI  (anno 2016)

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

Affiliazione Autori:  CNR-INO, National Istitute of Optics, Largo E. Fermi 6, 50125 Firenze, Italy; Corrosion and Metallurgy Study Centre \"Aldo Dacco\" Engineering Department - University of Ferrara, G. Saragat 1, Ferrara 44122 Italy; Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Unità di Ricerca del Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Universitàa degli Studi di Cagliari, Piazza D\'Armi, 09123 Cagliari Italy

Riassunto:  Ultra-high temperature ceramics (UHTCs) are interesting materials for a large variety of applications under extreme conditions. This paper reports on the production and extensive characterization of highly dense, pure zirconium and tantalum diborides, with particular interest to their potential utilization in the thermal solar energy field. Monolithic bulk samples are produced by Spark Plasma Sintering starting from elemental reactants or using metal diboride powders previously synthesized by Self-propagating High-temperature Synthesis (SHS). Microstructural and optical properties of products obtained by the two processing methods have been comparatively evaluated. We found that pure diborides show a good spectral selectivity, which is an appealing characteristic for solar absorber applications. No, or very small, differences in the optical properties have been evidenced when the two investigated processes adopted for the fabrication of dense TaB2 and ZrB2, respectively, are compared. (C) 2016 Elsevier Ltd. All rights reserved.

Rivista/Giornale:  RENEWABLE ENERGY
Volume n.:  91      Pagine da: 340  a: 346
Ulteriori informazioni:  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 ” for providing the grant for M.M. within the framework of the “SOLE” project (pratica n. 2013.0726 ). Authors thank Dr. L. Silvestroni and Dr. D. Sciti (ISTEC-CNR) for useful discussions about sample preparation and microstructural analysis. Thanks are also due to Mr. Mauro Pucci and Mr. Massimo D
DOI: 10.1016/j.renene.2016.01.068

*Impact Factor della Rivista: (2016) 4.357   *Citazioni: 16
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  19/05/2019

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