The role of brookite in mechanical activation of anatase-to-rutile transformation of nanocrystalline TiO: An XRD and Raman spectroscopy investigation
CrystEngComm, ISSN: 1466-8033, Vol: 13, Issue: 16, Page: 5055-5061
2011
- 134Citations
- 1,597Usage
- 158Captures
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Metrics Details
- Citations134
- Citation Indexes134
- 134
- CrossRef119
- Usage1,597
- Downloads1,572
- 1,572
- Abstract Views25
- Captures158
- Readers158
- 158
Article Description
The mechanism of phase transformation in nanocrystalline TiO powders at ambient temperature during high energy ball milling and the role of brookite phase in anatase-to-rutile phase transformation were investigated by the use of Rietveld analysis of X-ray diffraction patterns and Raman spectroscopy methods. The milling process was performed on a fully anatase phase nanocrystalline TiO powder via a high energy planetary ball mill with different ball-to-powder weight ratios followed by annealing of the as-milled samples. Some transformation from anatase-to-brookite was observed in all as-milled powders by high resolution transmission electron microscopy. It was proposed that brookite occurs at the {112} twin surfaces of anatase phase and therefore promotes anatase-to-rutile phase transformation. Based on the XRD and Raman results, it was proposed that brookite appears as an essential intermediate phase in mechanically induced anatase-to-rutile phase transformation which facilitates the phase transformation at ambient temperatures and also at higher temperatures during the post-annealing step. © 2011 The Royal Society of Chemistry.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=79960912066&origin=inward; http://dx.doi.org/10.1039/c1ce05185g; https://xlink.rsc.org/?DOI=c1ce05185g; https://ro.uow.edu.au/engpapers/5558; https://ro.uow.edu.au/cgi/viewcontent.cgi?article=8490&context=engpapers; https://dx.doi.org/10.1039/c1ce05185g; https://pubs.rsc.org/en/content/articlelanding/2011/ce/c1ce05185g
Royal Society of Chemistry (RSC)
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