Optical Investigation of Flame Spray Pyrolysis

FSP-process Indium
Indium distribution in a FSP-flame obtained by Laser-Induced Fluorescence
Chemieluminescence in FSP-Process

In this research topic, the flame spray pyrolysis (FSP) process for nanoparticle synthesis is investigated with different optical measurement techniques. FSP is used for particle synthesis in research and industry mainly because of its easy handling, great variability, cost efficiency and scalability. Many different functional Nanomaterials like TiO2, SiO2, In2O3 or ITO can be produced. The particle properties like particle size, morphology and crystallinity are mainly influenced by the synthesis parameters. We investigate the whole process-chain, starting with spray and droplet parameters to nucleation zones and the aggregation of particles. One of the most important parameters for FSP, however, is the flame temperature, which can be determined with Two-Line Atomic Fluorescence (TLAF) or Coherent Anti-Stokes Raman Scattering (CARS).
The experimental results can then be used in simulation models to adjust particle properties by specific synthesis parameters in the future.