Structure and morphology of nickel-alumina/silica solar thermal selective absorbers
| Autor: | Ewa Wäckelgård, Tobias Boström, Sima Valizadeh, Jens Jensen, Jun Lu, Gunnar Westin |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Scanning electron microscope Mineralogy Amorphous silica-alumina chemistry.chemical_element Condensed Matter Physics Microstructure Electronic Optical and Magnetic Materials Elastic recoil detection chemistry.chemical_compound Nickel chemistry Transmission electron microscopy Materials Chemistry Ceramics and Composites Aluminium oxide Thin film Composite material |
| Zdroj: | Journal of Non-Crystalline Solids. 357:1370-1375 |
| ISSN: | 0022-3093 |
| Popis: | Nickel-alumina/silica thin film materials for the use in solar thermal absorbers have been investigated using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Elastic Recoil Detection Analysis (ERDA). The TEM images revealed that all layers have a very small thickness variation and that the layers are completely homogenous. High resolution images showed 5–10 nm (poly) crystalline nickel nano-particles. ERDA showed that both the silica and alumina compositions contain more oxygen than 2:1 and 3:2 respectively. SEM showed the surface morphology and characteristics of the top silica anti-reflection layer. Hybrid-silica has showed to generate a smoother surface with less cracking compared to pure silica. The final curing temperature revealed to be of importance for the formation of cracks and the surface morphology. |
| Databáze: | OpenAIRE |
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