7th IMRMPT

Abstract

Abstract information

English title:	Influence of the synthesis pathway upon the thermoluminescent response of gadolinium aluminate matrix phosphors
Spanish title:	Influencia de la ruta de s�ntesis sobre la respuesta termoluminiscente de f�sforos de matriz de aluminato de gadolinio.
English abstract:	The phosphors that present of a glow curve with a peak much more intense than the others, a sensitization to low doses and a linear relationship between the thermoluminescent response and the dose, are demanded in the dosimetry market. The gadolinium aluminate has been successfully used as host of phosphors with luminescent properties. Principally, the luminescent response of the said matrix has been improved by doping with rare earths ions. The thermoluminescent signal depends on the synthesis route, since the crystal defect density is closely connected to the pathway that the material went through to be produced. Thus, as part of the optimization process to sensitize a phosphor, it is necessary to choose the synthesis route that enhances the efficiency of its thermoluminescent mechanisms. The research herein was focused on synthetizing phosphors with stoichiometries GdAlO3 and Gd0.98Dy0.02AlO3 by three routes and determine the most recommendable to improve their thermoluminescent response. The synthesis methods were the reverse coprecipitation, where was changed the source of the Al3+ ions to determine how influential the raw material was, and the third was modified citrate precursor method. The phosphors yielded by reverse coprecipitation method showed the most sensitive thermoluminescent signals, mainly, the Dy3+ ion activated phosphor produced the most intense signal that could be related to the most suitable density and distribution of crystal defects.
Spanish abstract:	Los f�sforos que presentan una curva de brillo con un pico mucho m�s intenso que los dem�s, una sensibilizaci�n a dosis bajas y una relaci�n lineal entre la respuesta termoluminiscente y la dosis, son demandados en el mercado de la dosimetr�a. El aluminato de gadolinio se ha utilizado con �xito como anfitri�n de f�sforos con propiedades luminiscentes. Principalmente, la respuesta luminiscente de dicha matriz se ha mejorado dopando con iones de tierras raras. La se�al termoluminiscente depende de la ruta de s�ntesis, ya que la densidad del defecto del cristal est� estrechamente relacionada con la ruta por la que pas� el material para ser producido. As�, como parte del proceso de optimizaci�n para sensibilizar un f�sforo, es necesario elegir la ruta de s�ntesis que mejore la eficiencia de sus mecanismos termoluminiscentes. La presente investigaci�n se centr� en sintetizar f�sforos con estequiometr�as GdAlO3 y Gd0.98Dy0.02AlO3 por tres rutas y determinar la m�s recomendable para mejorar su respuesta termoluminiscente. Los m�todos de s�ntesis fueron la coprecipitaci�n inversa, donde se cambi� la fuente de los iones Al3+ para determinar qu� tan influyente era la materia prima y el tercero fue el m�todo del citrato precursor modificado. Los f�sforos producidos por el m�todo de coprecipitaci�n inversa mostraron las se�ales termoluminiscentes m�s sensibles, principalmente, el f�sforo activado por iones Dy3+ produjo la se�al m�s intensa que podr�a relacionarse con la densidad y distribuci�n m�s adecuada de los defectos del cristal.
Topic:
Presentation Type:
Speaker:

Authors

Name	Institution	Email
JUAN ZARATE-MEDINA	UNIVERSIDAD MICHOACAN DE SAN NICOLAS DE HIDALGO	jzarate@umich.mx
Alejandro Alonso Sotolongo	Universidad Michoacana de San Nicolas de Hidalgo	aasotolongo987@gmail.com
Teodoro Rivera Montalvo	Instituto Polit�cnico Nacional, CICATA-Legaria	riveramt@hotmail.com

Presentation

Room:	Principal Room
Date:	June 7, 2023
Hour:	15:20 - 15:40

Back

7^th IMRMPT
Seventh International Meeting for Researchers in Materials and Plasma Technology

Previous editions:

        1st IMRMPT 2011
        2nd IMRMPT 2013
        3rd IMRMPT 2015
        4th IMRMPT 2017
        5th IMRMPT 2019
        5+1 IMRMPT 2021

Contact information:
imrmpt@foristom.org

Copyright 2022 FORISTOM
All rights reserved