Huh, MY Kim, SH Ahn, JP Park, JK Kim, BK 2024-01-21T15:44:30Z 2024-01-21T15:44:30Z 2021-09-05 1999-03 0965-9773 https://pubs.kist.re.kr/handle/201004/142379 Tin particles of nanometer size have been synthesized by the gas condensation method using helium as the convection gas. In order to study oxidation behaviors of the nanophase tin powder, the changes in morphology and crystal phases were investigated during heat treatment in air. The as-synthesized powder was oxidized to both the stable tetragonal SnO2 and the non-stable orthorhombic SnO2 which is known to form at extremely high pressure. An intermediate annealing at 225 degrees C for 20 hours gave rise to the oxidation induced amorphization of nano-sized tin particles. The formation of the amorphous tin oxide was explained by suppressed nucleation of crystalline oxides in nano-sized particles. The amorphous tin oxide was transformed into the tetragonal SnO2 through crystallization. (C) 1999 Acta Metallurgica Inc. English PERGAMON-ELSEVIER SCIENCE LTD GAS CONDENSATION SNO2 POWDERS OXIDES Oxidation of nanophase tin particles Article 10.1016/S0965-9773(99)00034-3 1 NANOSTRUCTURED MATERIALS, v.11, no.2, pp.211 - 220 NANOSTRUCTURED MATERIALS 11 2 211 220 scie scopus 000081172200007 2-s2.0-0032628119 Materials Science, Multidisciplinary Materials Science Article GAS CONDENSATION SNO2 POWDERS OXIDES ultrafine powders