Oxidation of small metal particles

Rafi Gatt; Gunnar A. Niklasson; Maiken Heim; Claes-Goeran Granqvist

doi:10.1117/12.161974

22 October 1993 Oxidation of small metal particles

Rafi Gatt, Gunnar A. Niklasson, Maiken Heim, Claes-Goeran Granqvist

Proceedings Volume 2017, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XII; (1993) https://doi.org/10.1117/12.161974
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Selective absorbers utilize in many cases the enhanced solar absorptance of small metal particles embedded in a layered ceramic medium. A crucial factor in determining the performance of such an absorber is the degradation rate of this layer. The oxidation of ultrafine gas evaporated metal particles is examined here. Several metal develop a stable oxide film around the surface of small particles. It is shown that there is a linear dependence between the size of the metal core and the particle radius for Al, Mg, Be and Sn in room temperature and for Si at high temperatures. Charge quantization is proposed as a possible mechanism responsible for this phenomenon. Thermogravimetric measurements on Ni particles show a rapid oxidation for intermediate temperatures.

Citation Download Citation

Rafi Gatt, Gunnar A. Niklasson, Maiken Heim, and Claes-Goeran Granqvist "Oxidation of small metal particles", Proc. SPIE 2017, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XII, (22 October 1993); https://doi.org/10.1117/12.161974

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