Validation of Cabrera-Mott model for low-temperature oxidation of aluminum nanoparticles
Source abstract
Abstract
Validation of the Cabrera-Mott low-temperature oxidation model is proposed to better establish a procedure for the passivation of aluminum nanoparticles after production. The powder, generated in an inductively coupled plasma reactor and characterized by a specific surface of around 40 m2/g, is sampled prior to passivation. Controlled oxidation of the powder is then performed in a TGA/DSC apparatus using different oxygen concentrations. The mass increase due to the oxidation of aluminum to amorphous alumina is mathematically converted into an oxide thickness evolution. The experimental results are then compared with the Cabrera-Mott model and the values of parameters such as the distance between energy barriers, the number of ions per unit area, and the Mott potential are set. In addition, the latter two parameters are varied with the oxygen concentration, following an evolution similar to that of a Langmuir isotherm. This paper then proposes the first validation of a low-temperature oxidation model for aluminum nanoparticles.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Energetic Materials and Combustion · Thermal and Kinetic Analysis · nanoparticles nucleation surface interactions
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References (14)
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