Anelastic spectroscopy in TiO2
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Data
2005-12-01
Autores
Grandini, Carlos Roberto [UNESP]
Oliveira, R. L N [UNESP]
Mota, Rogério Pinto [UNESP]
Santos, F. P.
Campos, E.
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Resumo
Titanium dioxide (rutile) has a lot of interesting and useful features and hence is widely utilized for application. It has been used as white pigment, photocatalyst, biocompatible material and semiconductor material used in solar battery. In semiconducting TiO2 oxygen vacancies are said to play an important role in the electrical conduction. Measurements of the elastic energy loss and modulus (anelastic spectroscopy) as a function of temperature can distinguish among the different atomic jumps, which occur in the various phases or at different local ordering. In this paper, it is reported anelastic relaxation measurements in TiO2 samples using a torsion pendulum operating in frequencies around 40Hz, in the temperature range between -173°C to 330°C with heating rate of 1°C/min. The results shown a reduction in the elasticity modulus with the increase in the corn starch content used for this consolidation.
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Palavras-chave
Anelastic spectroscopy, Mobility of atoms, Relaxation, Titanium dioxide, Energy dissipation, Function evaluation, Pigments, Relaxation processes, Solar cells, Spectroscopic analysis
Como citar
Materials Science Forum, v. 498-499, p. 540-545.