Formation of glass microspheres with rotating electrical arc

The paper presents the experimental device for obtaining glass microspheres in rotating electrical arc. With this device, for arc power values of 5×103 W and for frequency of ν=850 s−1, the glass powder with arbitrary shaped particles was transformed in microsphere with diameters between 2 and 24 μm and the wall thickness between 0.4 and 1.6 μm. The particles in the powder were up to 30 μm in diameters, have a flow rate of 2 g·min−1 and were transported in argon (5 Nl min−1). The mean diameter is d̄=5.62 μm.