Introduction.

This article reports the synthesis and characterization of the glass-ceramic powders of the Li2OAl2O3SiO2 (LAS) system, doped with 0.5% and 1% w / w copper oxide (CuO), as a first stage thinking about its subsequent evaluation as a thermoluminescent material (TL) and its possible application as a TL dosimeter.

Objective.

To evaluate the effect of the calcination and pyrolysis treatments of the dry gels of lithium aluminosilicates doped with CuO, obtained by Sol - Gel synthesis.

Materials and Methods.

The pure and doped CuO LAS matrices were obtained by the gelation of lithium aluminum formats, in the presence of tetraethoxysilane and CuO. The gels obtained were dried at 120 ° C and 2.5 h. Half of the amount obtained was subjected to a calcination treatment (480 °C, 5 h) while the other half was subjected to a pyrolysis process (nitrogen atmosphere) at 480 °C for 5 h. The samples obtained were characterized by scanning electron microscopy (SEM), infrared spectroscopy (FTIR), zeta potential and X-ray diffraction (XRD).

Results.

By means of the SEM analysis the micrometric particle size was confirmed, from the spectra some prominent bands are observed between Si-O or Al-O, besides it is assumed that the thermal treatments were suitable for the release of organic rebasing groups.

Conclusions.

The synthesis implemented allowed the obtaining of micrometric particles (φp < 25 μm). The thermal treatments had a significant effect on the superficial functionalization of the particles obtained, and the composition of the material and it was verified that the temperature used was adequate for the release of organic reagents, in addition with the spectra we observed the functional rebar groups that were present in the material.

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