The results of experimental research and numerical
modeling of convective heat and mass transfer during the
sublimation of spherical particles of beta-diketonates of metals
Cr(acac)3 and Zr(dpm)4 in a high-temperature flow of an inert
gas (argon or helium) are presented. The sublimation process is
visualized. The temperature and particle size dynamics are
obtained. The effect of the carrier-gas properties on the
sublimation intensity of the particles with different initial
diameters in the temperature range from 200 to 330 ºС is
analyzed. It is shown that under the conditions of a high
intensity of substance removal from the phase transition
surface, the time for complete sublimation of the sample of
Cr(acac)3 and Zr(dpm)4 may be less than the time, required to
establish an equilibrium temperature between the precursor
particle and the vapor-gas flow.
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .