Abstracts Book - IMRC 2018

• SA6-P008
THERMOLUMINESCENCE AND AFTERGLOW IN RED
NANOPHOSPHOR MgGa2O4:Cr 3+ SYNTHESIZED BY COMBUSTION
METHOD
Nancy Jovaana Zúñiga Rivera 1 , Rodolfo Ruiz Torres 2 , Marcelino Barboza Flores 3 , Rafael Garcia
Gutierrez 3
1
Universidad de Sonora, Departamento de Física, Matemáticas e Ingeniería, Universidad de
Sonora U.R.S., Mexico. 2 Universidad de Sonora, Departamento de Física, Posgrado en
Nanotecnología., Mexico. 3 Universidad de Sonora, Departamento de Investigación en Física,
Mexico.
In this work we reported the luminescent contribution of the crystalline matrix
of MgGa2O4 doped with Cr 3+ . Recent studies show the luminescent effect
attributed to the chromium ion associated with emission bands in the red
spectral region, with applications in cancer detection, optoelectronic,
dosimeters and signalization. However, the current synthesis method of these
materials high costs and long times (solid reaction). In this work we propose
combustion synthesis as a fast and economical alternative to obtain doped
MgGa2O4 for the aforementioned applications. The precursors were calculated
the stoichiometric reaction by introducing excess carbohydrazide. The nitrates
were diluted with distilled water and placed in a preheated oven at 500 ° C. After
5 minutes, the redox reaction leads to the formation of foam that is
subsequently taken to cool and grind for characterization.
The X-ray diffraction shows the presence of MgGa2O4 in its cubic form; PDF 00-
036-0181. Scanning electron microscopy shows the presence of nanostructured
particles, EDS shows percentages of the participating elements and
homogeneity in the sample. Photoluminescence shows a broad band with a
maximum of 707 nm associated with Cr 3+ . Thermoluminescence (TL) and
afterglow (AG) show beta response at 156°C and 20 min of afterglow.
Acknowledgment: We acknowledge the partial financial supports CONACyT and
Universidad de Sonora especially to Departamento de Física, Matemáticas e
Ingeniería, Universidad de Sonora U.R.S, Navojoa, Sonora.
Keywords: nanophosphor, Thermoluminescence, Afterglow
Presenting authors email: nancyjo_zu@outlook.com