Fig. 3From: Synthesis and Characterization of Nanoscale Tungsten Particles with Hollow Superstructure Using Spray Drying Combined with Calcination ProcessThe microstructure and XRD pattern of spray-dried (NH4)6W7O24·6H2O particles. a, b The morphology of the (NH4)6W7O24·6H2O particles atomized by spray drying method. c The schematic of collision between particles. d The XRD pattern of spray-dried (NH4)6W7O24·6H2O powderBack to article page