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Título:
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Structure and grain growth of TiO2 nanoparticles investigated by electron and X-ray diffractions and Ta-181 perturbed angular correlations
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Autores:
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Schlabach, S. ;
Szabó, D. V. ;
Vollath, D. ;
Presa Muñoz del Toro, Patricia de la ;
Forker, M.
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Tipo de documento:
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texto impreso
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Editorial:
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American Institute of Physics, 2006-07-15
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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Bare and coated TiO? nanoparticles with particle sizes d 100 nm after 1300 K. PAC spectra taken in the same temperature range show that with increasing temperature, the initially disordered state transforms to well-ordered rutile TiO?. The data suggest a critical grain size of d ~10 nm for the onset of the ordering process. The spectra of coarse-grained TiO? are reached at a particle size d >= 30 nm. In n-TiO? coated with Al?O? and ZrO? both the cores and the coatings were found to grow with increasing temperature; the cores of the coated particles, however, grow much less than those of the noncoated particles. The PAC method was used to investigate the QI in both TiO? cores and in the ZrO? coating of n-TiO?/ZrO? at different temperatures. These data suggest that although the coated particles grow with temperature, the ordering process is obstructed, possibly by a solid state reaction between the TiO? kernels and the coatings.
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En línea:
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https://eprints.ucm.es/45590/1/DeLaPresaP%2013%20libre.pdf
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