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Effect of thermal and mechanical treatments on the cathodoluminescence of tin and titanium oxides

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Maestre Varea, David and Plugaru, R and Cremades Rodríguez, Ana Isabel and Piqueras de Noriega, Javier (2003) Effect of thermal and mechanical treatments on the cathodoluminescence of tin and titanium oxides. In Spatially resolved characterization of local phenomena in materials and nanostructures. MRS Proceedings (738). Materials Research Society, pp. 73-78. ISBN 1-55899-675-3

Official URL: http://dx.doi.org/10.1557/PROC-738-G2.4


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Abstract

The luminescence of titanium oxide and tin oxide has been investigated by cathodoluminescence in the SEM, as a function of the structural changes induced by thermal treatments. The evolution of the luminescence of TiO2 rutile, anatase and mixture phase with the annealing temperature is related to the process of thermal induced grain texture and to transition of metastables phases to the stable rutile. The emission band is peaked at 480 nm for the composite phase and at 580 nm for anatase and rutile phases respectively. A broad band in the 520-560 nm region is present in the spectra of both anatase and rutile phase. Thermal annealing leads to a red shift of the luminescence emission, with the emission band peaked at around 820 nm. In sintered tin oxide the main emission bands appear centered at about 480 nm and 630 nm. The intensity of these bands increases with annealing temperature up to 1200degreesC, whereas for samples annealed at 1500degreesC these emissions are quenched. Mechanical ball milling has been used to produce nanocrystalline SnO_2 grains to investigate the influence of the presence of nanocrystals on the CL emission.


Item Type:Book Section
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Symposium on Spatially Resolved Characterization of Local Phenomena in Materials and Nanostructures (2002. Boston)

Uncontrolled Keywords:Thin-Films, Gas-Sensors
Subjects:Sciences > Physics > Materials
ID Code:23321
Deposited On:23 Oct 2013 16:58
Last Modified:13 Feb 2018 15:07

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