- Title
- Optical characterisation of alumina–mullite materials for solar particle receiver applications
- Creator
- Chen, Jiangjing; Wheeler, Vincent; Liu, Boqing; Kumar, Apurv; Coventry, Joe; Lipiński, Wojciech
- Date
- 2021
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/177872
- Identifier
- vital:15321
- Identifier
-
https://doi.org/10.1016/j.solmat.2021.111170
- Identifier
- ISBN:0927-0248 (ISSN)
- Identifier
-
https://doi.org/10.1016/j.solmat.2021.111225
- Abstract
- Alumina–mullite particles are used in high-temperature solar thermal applications such as solar particle receivers. In this study, optical properties of alumina–mullite materials with variable content of alumina and mullite are determined in the spectral range of 0.193–1.69 μm. Variable angle spectroscopic ellipsometry is performed for alumina–mullite thin films, which are fabricated by magnetron sputtering. The thin films are characterised by scanning electron microscopy, atomic force microscopy, and energy dispersive spectroscopy methods. The B-spline model is employed to generate ellipsometric parameters to fit the measured data and to obtain the optical properties. The investigated materials of variable content of alumina and mullite have a similar refractive index in the considered spectral range. The absorptive index of the alumina–mullite materials in the spectral range of 0.193–0.4 μm is higher than in the range 0.4–1.69 μm. The absorptive index decreases with increasing content of alumina in the spectral range of 0.193–0.4 μm. The material composed of similar proportions of alumina and mullite yields the highest absorptive index in the spectral range of 0.4–1.1 μm. The optical properties determined for the alumina–mullite materials are applied to obtain the radiative properties of spherical homogeneous particles. Mie theory is used to calculate absorption and scattering efficiency factors, as well as the scattering phase function. In addition, the scattering phase functions are obtained using the Henyey–Greenstein approximation and the transport approximation. The Monte Carlo ray-tracing method is employed to study the radiative transfer in a model one-dimensional particle curtain containing polydisperse particles exposed to high-flux solar irradiation. It is found that the overall reflectance, absorptance and transmittance of the particles only weakly depend on the optical properties of the materials investigated. © 2021 Elsevier B.V. Corrigendum to “Optical characterisation of alumina–mullite materials for solar particle receiver applications” [Solar Energy Mater. Solar Cell. 230 (2021) 111170] (Solar Energy Materials and Solar Cells (2021) 230, (S0927024821002130), (10.1016/j.solmat.2021.111170)) Solar Energy Materials and Solar Cells, Volume 231, October 2021, Article number 111225. https://doi.org/10.1016/j.solmat.2021.111225
- Publisher
- Elsevier B.V.
- Relation
- Solar Energy Materials and Solar Cells Vol. 230, no. (2021), p.
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- Copyright © 2021 Elsevier B.V.
- Subject
- 02 Physical Sciences; 03 Chemical Sciences; 09 Engineering; B-spline; Ellipsometry; Mie theory; Monte Carlo; Optical properties; Scattering
- Reviewed
- Funder
- This research was funded by the Australian Solar Thermal Research Institute, a project supported by the Australian Government through the Australian Renewable Energy Agency ( 1-SRI002 ). The financial support from the US Department of Energy and Sandia National Laboratories ( DE-FOA-0001697-1503 ) is gratefully acknowledged. This work was performed in part at the ACT node of the Australian National Fabrication Facility and the Centre for Advanced Microscopy. Funding text 2: This research was funded by the Australian Solar Thermal Research Institute, a project supported by the Australian Government through the Australian Renewable Energy Agency (1-SRI002). The financial support from the US Department of Energy and Sandia National Laboratories (DE-FOA-0001697-1503) is gratefully acknowledged.
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