Nanomicrostructure, chemical stability and abnormal transformation in ultrafine particles of oxidized tin

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)13-17
Journal / PublicationJournal of Physics and Chemistry of Solids
Volume58
Issue number1
Publication statusPublished - Jan 1997

Abstract

Ultrafine oxidized tin particles with particle size about 6 nm have been prepared by inert gas condensation deposition under low oxygen pressure. The nanostructure, hyperfine parameters, and chemical stability of the particles have been studied by means of TEM, XRD and Mössbauer spectra analysis. The results show that the nanostructure of particles can be divided into a crystalline component and a disordered component. Nano-powders have high chemical activity and can be oxidized into stable SnO2 compounds at ambient temperature. XRD measurements indicate that post-annealing at temperatures of 300-600°C for 2h in air produced orthorhombic and tetragonal SnO2 phases. Orthorhombic SnO2 phase may be an intermediate phase during the transformation of disordered SnO2 to tetragonal SnO2 (rutile) which is the high temperature stable phase under oxygen deficiency conditions. Copyright © 1996 Elsevier Science Ltd.

Research Area(s)

  • A. Nanostructures, A. Oxides, C. Mössbauer effect, D. Crystal structure, D. Phase transitions