Abstract
In inert gas condensation (IGC) evaporation–condensation processing, the effects of IGC convection gas on the crystallographic structure, size and shape of tin oxide nanoparticles were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis. The phase transformation of tin oxide (II) nanoparticles was also studied after heat treatment at 320 °C. IGC processing was conducted at 1000 °C for 1 h. Oxygen or oxygen and helium mixed gas were used as the convection gas. Metastable tetragonal SnO nanoparticles were obtained at 0.02 kPa of P O 2 and P (He+O 2) . The amorphous SnO nanoparticles prepared at 1.3 kPa of P O 2 and P (He+O 2) were explained by the rapid quenching effect of the evaporated nanoclusters. The resultant nanoparticles size was about 10 nm with a round shape. The metastable tetragonal SnO nanoparticles were almost transformed to a stable tetragonal SnO 2 after heat treatment at 320 °C.
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