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Morphology Spherical Particles Obtained Processing Agglomerates of Silicate Composition on Plasma Jet

The paper considers theoretical concepts and experimental data on the influence of thermal plasma processing on morphology and phase composition of microspheres produced from agglomerated refractory aluminum silicate powders. It is found that plasma processing of the agglomerated powder consisting of non-standard aluminum silicate particles at different thermophysical parameters of the plasma jet, provides three types of the particle morphology. The phase composition of plasma-processed agglomerated powders is characterized by an X-ray amorphous halo. The particles processed in the turbulent plasma jet are subjected to the lowest thermal load; the transition of coalesced grains in the agglomerate center to the molten state does not occur. This is because the low-intensity $\beta$-SiO2 peak observed on the X-ray diffraction pattern.