Thermoluminescence properties of TiO2 nanopowder

J. C. Azorín-Vega, J. Azorín-Nieto, M. García-Hipólito, T. Rivera-Montalvo

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

12 Citas (Scopus)

Resumen

Titanium oxide (TiO2)-based ceramics have many desirable and potential applications. Their mechanical properties are strongly affected by composition and microstructure, and can thus be tailored. The optical properties of TiO2 are useful, being colorless, transparent, and possessing a high refractive index. These properties and the ability to tailor the structure make TiO2-based ceramics suitable for a wide range of applications. Interest in titanium oxide-based ceramics has increased considerably in recent years as possible thermoluminescence (TL) dosimeters which could be used in a wide variety of research activities and applications of ionizing radiation dosimetry. The aim of this work is to investigate some dosimetric properties of manganese doped titanium oxide (TiO2 : Mn) nanopowder concerning the TL phenomenon related to its structural, morphological, and luminescent characteristics. Powder of TiO2 : Mn was prepared using a co-precipitation method from titanium oxysulfate-sulfuric acid complex (TiOSO4 × H2 SO4 × H2 O) and manganese (II) chloride · 6 H2 O. Formation of the compound was confirmed by studying the X-ray diffraction patterns. Diffraction patterns obtained suggested a mixture of anatase and rutile structure of the TiO2 powder analyzed. Assuming the particles are stress-free, the size was estimated from a single diffraction peak using Scherrer's equation. Powder with the average nanopolycrystalline sizes from 10 nm up to about 80 nm was obtained. The glow curve of TiO2 : Mn nanopowder exposed to gamma radiation exhibited one main peak centered at 240 {ring operator} C and a lower intensity peak at about 258 {ring operator} C. The intensity of the main peak increases as the dose increases. TL glow curve intensity of TiO2 : Mn powder submitted to 1000 {ring operator} C was found to be more intense than that of the amorphous material, with the intensity increasing with the increase of crystallization temperature.

Idioma originalInglés
Páginas (desde-hasta)613-616
Número de páginas4
PublicaciónRadiation Measurements
Volumen42
N.º4-5
DOI
EstadoPublicada - abr. 2007

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