Multi-Scale Femtosecond-Laser Texturing for Photothermal Efficiency Enhancement on Solar Absorbers Based on TaB2 Ceramics
Year: 2023
Authors: Sani E., Sciti D., Failla S., Melandri C., Bellucci A., Orlando S., Trucchi DM.
Autors Affiliation: Natl Res Council CNR INO, Natl Inst Opt, Largo E Fermi 6, I-50125 Florence, Italy; Natl Res Council CNR ISSMC, Inst Sci Technol & Sustainabil Ceram, Via Granarolo 64, I-48018 Faenza, Italy; Natl Res Council CNR ISM, Inst Struct Matter, Montelibretti Sect, Via Salaria Km 29-300, I-00015 Monterotondo, Italy; Natl Res Council CNR ISM, Inst Struct Matter, Tito Scalo Sect, I-85050 Tito, Italy.
Abstract: Tantalum boride is an ultra-refractory and ultra-hard ceramic known so far for its favorable high-temperature thermo-mechanical properties and also characterized by a low spectral emittance, making it interesting for novel high-temperature solar absorbers for Concentrating Solar Power. In this work, we investigated two types of TaB2 sintered products with different porosities, and on each of them, we realized four femtosecond laser treatments differing in the accumulated laser fluence. The treated surfaces were then characterized by SEM-EDS, roughness analysis, and optical spectrometry. We show that, depending on laser processing parameters, the multi-scale surface textures produced by femtosecond laser machining can greatly increase the solar absorptance, while the spectral emittance increase is significantly lower. These combined effects result in increased photothermal efficiency of the absorber, with interesting perspectives for the application of these ceramics in Concentrating Solar Power and Concentrating Solar Thermal. To the best of our knowledge, this is the first demonstration of successful photothermal efficiency enhancement of ultra-hard ceramics using laser machining.
Journal/Review: NANOMATERIALS
Volume: 13 (10) Pages from: 1692-1 to: 1692-15
More Information: This research was partially funded within the project with the title Network 4 Energy-Sustainable Transition-NEST, funded under the National Recovery and Resilience Plan (NRRP), Mission 4 Component 2 Investment 1.3-Call for tender No. 1561 of 11.10.2022 of Ministero dell’Universita e della Ricerca (MUR); funded by the European Union-NextGenerationEU, Project code PE0000021, Concession Decree No. 1561 of 11.10.2022 adopted by Ministero dell’Universita e della Ricerca (MUR), CUP B53C22004060006, according to attac hment E of Decree No. 1561/2022.KeyWords: Concentrating Solar Power; multi-scale surface texturing; solar absorbers; laser processingDOI: 10.3390/nano13101692ImpactFactor: 4.400Citations: 3data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-09-15References taken from IsiWeb of Knowledge: (subscribers only)
