The morphological analysis of flame generated carbon clusters is object of this work. Some methods to characterize this particulate on the basis of the fractal approach are briefly reported. Experiments are performed by sampling on the axis of ethylene-air diffusion flame. Analysis by Scanning Electron Microscope is worked out by application of the Nesting Square technique. Results show that the fractal dimension is not constant in correspondence of different residence times within the flame, according to previous studies performed by the authors utilizing static light scattering techniques. A comparison is performed between the aggregate morphology observed in flame experiments at temperatures about 1400 °C (Diffusion Limited Cluster-Cluster Aggregation) with respect to the shape of clusters generated by a slower agglomeration process at 70°C temperature (Reaction Limited Cluster-Cluster Aggregation).
Advanced Sampling and Characterization Techniques of Nanoparticle Products Resulting from Thermal Decomposition Processes / Bonifazi, Giuseppe; S., Di Stasio. - ELETTRONICO. - (2003). (Intervento presentato al convegno The 4th International Conference on Intelligent Processing and Manufacturing of Materials tenutosi a Sendai, Japan nel 21-23 May).
Advanced Sampling and Characterization Techniques of Nanoparticle Products Resulting from Thermal Decomposition Processes
BONIFAZI, Giuseppe;
2003
Abstract
The morphological analysis of flame generated carbon clusters is object of this work. Some methods to characterize this particulate on the basis of the fractal approach are briefly reported. Experiments are performed by sampling on the axis of ethylene-air diffusion flame. Analysis by Scanning Electron Microscope is worked out by application of the Nesting Square technique. Results show that the fractal dimension is not constant in correspondence of different residence times within the flame, according to previous studies performed by the authors utilizing static light scattering techniques. A comparison is performed between the aggregate morphology observed in flame experiments at temperatures about 1400 °C (Diffusion Limited Cluster-Cluster Aggregation) with respect to the shape of clusters generated by a slower agglomeration process at 70°C temperature (Reaction Limited Cluster-Cluster Aggregation).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.