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Title: Effects of Nb doping on the TiO2 anatase-to-rutile phase transition
Author: Arbiol i Cobos, Jordi
Cerdà Belmonte, Judith
Dezanneau, Guilhem
Cirera Hernández, Albert
Peiró Martínez, Francisca
Cornet i Calveras, Albert
Morante i Lleonart, Joan Ramon
Keywords: Equacions d'estat
Ciència dels materials
Equations of state
Materials science
Issue Date: 15-Jul-2002
Publisher: American Institute of Physics
Abstract: We study the influence of Nb doping on the TiO2 anatase-to-rutile phase transition, using combined transmission electron microscopy, Raman spectroscopy, x-ray diffraction and selected area electron diffraction analysis. This approach enabled anatase-to-rutile phase transition hindering to be clearly observed for low Nb-doped TiO2 samples. Moreover, there was clear grain growth inhibition in the samples containing Nb. The use of high resolution transmission electron microscopy with our samples provides an innovative perspective compared with previous research on this issue. Our analysis shows that niobium is segregated from the anatase structure before and during the phase transformation, leading to the formation of NbO nanoclusters on the surface of the TiO2 rutile nanoparticles.
Note: Reproducció del document publicat a:
It is part of: Journal of Applied Physics, 2002, vol. 92, num. 2, p. 853- 861
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ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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