TEM observation of growth and phase transformation in nanometer-sized titanium oxide powder

Gwan-Hyoung Lee, Jian Min Zuo

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The growth and phase transformation in the nanocrystalline titania powders were studied using TEM and X-ray diffraction. Titania particles consisting of anatase phase grow through coalescence. After a nucleus of rutile is formed, it grows at the expense of the nearest anatase particles. A nucleus of rutile is formed in two ways. The nucleation of rutile occurs at the amorphous interface between the small anatase particles. In a large anatase particle, the martensitic transformation is dominant. It is estimated that these two kinds of phase transformation mechanisms are controlled by the intrinsic and extrinsic defects. A rutile particle has the low-energy surfaces with a lot of terraces. The growth direction of a rutile particle is related to the orientation of twin. A rutile particle grows along a ̄121 direction on the {101}-twin plane.

Original languageEnglish
Pages (from-to)1780-1788
Number of pages9
JournalJournal of Materials Science
Volume46
Issue number6
DOIs
Publication statusPublished - 2011 Mar 1

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Titanium oxides
Powders
Titanium dioxide
Phase transitions
Transmission electron microscopy
Titanium
Martensitic transformations
Coalescence
Interfacial energy
Particles (particulate matter)
Nucleation
X ray diffraction
Defects
titanium dioxide

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Lee, Gwan-Hyoung ; Zuo, Jian Min. / TEM observation of growth and phase transformation in nanometer-sized titanium oxide powder. In: Journal of Materials Science. 2011 ; Vol. 46, No. 6. pp. 1780-1788.
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TEM observation of growth and phase transformation in nanometer-sized titanium oxide powder. / Lee, Gwan-Hyoung; Zuo, Jian Min.

In: Journal of Materials Science, Vol. 46, No. 6, 01.03.2011, p. 1780-1788.

Research output: Contribution to journalArticle

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