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Characterization of gas phase temperatures in dependence of particle presence in the flame spray pyrolysis process

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Abstract

We introduce a novel strategy to acquire gas phase temperatures by O2 pure rotational CARS during flame spray pyrolysis (FSP) for silica production. RCARS benefits from a polarization filtering technique that is essential in particle and droplet environments. Particle containing regions were located by correlating laser-induced breakdown (LIB) in a particle-laden and a particle-free flame at different heights. Measured temperatures in the particle regime show significantly lower flame temperatures for particle-laden flames since energy is dissipated rapidly by radiation heat transfer in the presence of particles.

© 2012 Optical Society of America

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