In addition in order to obtain different particles sizes and

Because considerable amount suspension was adhered on the wall of chamber and lots of larger R547 were formed due to the lower rotating speed, leading to a low collection rate and poor morphology of misshapen particles. However, an obvious regularity was observed in Fig. 6(a) when it was higher than 8000 r/min. With increasing the atomizer speed, the mean size obviously decreased and it was less sensitivity for dispersant content gradually.