Phase transformations in nanocrystalline TiO{sub 2} milled in different milling atmospheres

Journal Article · Mon Nov 01 04:00:00 EST 2004 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2004.08.017· OSTI ID:20658189

Xiaoyan, Pan ^[1]; Xueming, Ma ^[1]

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1. Department of Physics, East China Normal University, Shanghai 200062 (China)

The structural evolution of nanocrystalline TiO{sub 2} milled in different milling atmospheres was studied by X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy. Rietveld refinements of the XRD data showed that high-energy ball milling induced the transformations from anatase to srilankite and rutile at room temperature and ambient pressure. The milling atmospheres with different oxygen partial pressures had an influence on the transformation kinetics of anatase. When the nanocrystalline TiO{sub 2} powders were, respectively, milled in oxygen, air and nitrogen atmospheres, the transformation rates of anatases in turn increased with a decrease in oxygen partial pressure of the milling atmosphere, due to the reducing concentration of oxygen vacancies in the milled TiO{sub 2} lattice.

• OSTI ID: 20658189
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 11 Vol. 177; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CRYSTALS
KINETICS
MILLING
NANOSTRUCTURES
OXYGEN
PARTIAL PRESSURE
PHASE TRANSFORMATIONS
RAMAN SPECTROSCOPY
RUTILE
TEMPERATURE RANGE 0273-0400 K
TITANIUM OXIDES
VACANCIES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY