Reflectance spectral studies of spark plasma sintered tungsten carbide pellet
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866916562322063360 |
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| author | Chono, Toshiharu Tokutomi, Hisashi Nakamura, Kazuma Miyazaki, Koji |
| author_facet | Chono, Toshiharu Tokutomi, Hisashi Nakamura, Kazuma Miyazaki, Koji |
| contents | We report the first spectral reflectance of tungsten carbide (WC) as potential solar selective absorber. We developed an optical measurement system for visible to mid-infrared spectroscopy, covering the range of 0.1 to 2.5 eV, to evaluate the solar selectivity. A polycrystalline WC was prepared using spark plasma sintering method. The measured spectral reflectance of WC exhibits a low-energy plasma excitation around 0.6 eV corresponding to the cutoff energy of sunlight, consistent with ab initio calculations, thus making it preferable for the solar selective absorber. We also discuss effects of the sample quality on the spectral reflectance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_15754 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Reflectance spectral studies of spark plasma sintered tungsten carbide pellet Chono, Toshiharu Tokutomi, Hisashi Nakamura, Kazuma Miyazaki, Koji Materials Science We report the first spectral reflectance of tungsten carbide (WC) as potential solar selective absorber. We developed an optical measurement system for visible to mid-infrared spectroscopy, covering the range of 0.1 to 2.5 eV, to evaluate the solar selectivity. A polycrystalline WC was prepared using spark plasma sintering method. The measured spectral reflectance of WC exhibits a low-energy plasma excitation around 0.6 eV corresponding to the cutoff energy of sunlight, consistent with ab initio calculations, thus making it preferable for the solar selective absorber. We also discuss effects of the sample quality on the spectral reflectance. |
| title | Reflectance spectral studies of spark plasma sintered tungsten carbide pellet |
| topic | Materials Science |
| url | https://arxiv.org/abs/2411.15754 |