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Thermoluminescence Properties of Novel La2O3 Phosphor Obtained by Solution Combustion Synthesis

Published online by Cambridge University Press:  01 February 2011

V. R. Orante-Barrón ,
C. Cruz-Vázquez ,
R. Bernal ,
G. Denis  and
E. G. Yukihara
V. R. Orante-Barrón
Affiliation:
Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Apartado Postal 130, Hermosillo, Sonora 83000 México
C. Cruz-Vázquez
Affiliation:
Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Apartado Postal 130, Hermosillo, Sonora 83000 México
R. Bernal
Affiliation:
Departamento de Investigación en Física, Universidad de Sonora, Apartado Postal 5-088, Hermosillo, Sonora 83190 México
G. Denis
Affiliation:
Physics Department, Oklahoma State University, 145 Physical Sciences II, Stillwater, OK 74078USA
E. G. Yukihara
Affiliation:
Physics Department, Oklahoma State University, 145 Physical Sciences II, Stillwater, OK 74078USA
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Abstract

Thermoluminescence (TL) of La2O3 is reported for the first time. Novel La2O3 phosphor was obtained by solution combustion synthesis (SCS) in which a redox combustion process between lanthanum nitrate and urea at 500 °C is accomplished. The powder samples obtained were annealed at 900 °C during 2 h in air. X-Ray Diffraction (XRD) results showed the hexagonal phase of La2O3 for annealed powder samples. The TL glow curve obtained after exposure to beta radiation of these samples, displayed two maxima located at ˜ 101 °C and ˜ 200 °C, and a shoulder at ˜ 247 °C. Results from experiments such as dose response and fading showed that annealed La2O3 powder obtained by SCS is a promising material for radiation dosimetry applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1278: Composite, Hybrid Materials and Ecomaterials , 2010 , S08-74
Copyright
Copyright © Materials Research Society 2010

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