Optical properties of dense zirconium and tantalum diborides for solar thermal absorbers |
| |
| Affiliation: | 1. CNR-INO National Institute of Optics, Largo E. Fermi, 6, I-50125 Firenze, Italy;2. Corrosion and Metallurgy Study Centre “Aldo Daccò”, Engineering Department, University of Ferrara, G. Saragat 1, Ferrara 44122, Italy;3. 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;1. Vellore Institute of Technology University, Chennai Campus, India;2. Indian Institute of Technology Madras, Chennai, India;1. College of Forestry, Northwest A&F University, 3 Taicheng Road, Yangling 712100, China;2. Beijing Research and Development Center for Grass and Environment, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China;1. Federal University of Pará, Rua Augusto Corrêa, 01 – Guamá, 66075-110, Caixa postal 479, Belém, Pará, Brazil;2. Pontifical Catholic University of Minas Gerais, Av. Dom José Gaspar, 500 – Coração Eucarístico, 30535-901 Belo Horizonte, Minas Gerais, Brazil;3. Federal Center of Technological Education of Minas Gerais, Av. Amazonas 5253 – Nova Suíça, 30421-169 Belo Horizonte, Minas Gerais, Brazil |
| |
| Abstract: | 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. |
| |
| Keywords: | Borides Optical properties Solar absorbers Solar plants Concentrating solar power |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
