Victor Alves Soares

Universidade Federal de Sergipe · Department of Physics

We report on the magnetism of amorphous SiO 2 –Al 2 O 3 –CaO–MgO–Fe 2 O 3 –K 2 O–MnO:CA (CA—activated carbon) aluminosilicate glasses prepared by a fusion-quenching method. Fourier transform infrared and Raman spectroscopy show that a Fe ²⁺ lattice modifier in the glass structures induces depolymerization, strongly influencing the magnetic transiti...

Zinc oxide (ZnO) nanoparticles were successfully synthesized using a whey-assisted sol-gel method. X-ray diffraction (XRD) and Raman spectroscopy analysis revealed a wurtzite crystalline structure for ZnO nanoparticles with no impurities present. Transmission electron microscopy (TEM), (XRD) observations, and UV–Vis absorption spectroscopy results...

In this article, we analyzed the explicit presence of the theoretical-pedagogical foundations in the productions-actions of the scholarship students of the Institutional Program of Initiation to Teaching (PIBID). Therefore, a brief bibliographic survey of the works published by the scholars) of the Federal Institute of the Sertão Pernambucano campu...

In this paper we present the structural, DC electrical characterization of ceramics based on nickel manganite (NiMn2O4, NMO) pure and doped with 5 mole % of Cu 2+ , and Zn 2+ produced by the sol-gel method. The ceramic bodies of nickel manganite were sintered at a temperature of 1000 °C during 3 h. The structural characterization was based on the t...

In this paper, the optical absorption and radioluminescence (RL) of polycrystalline ceramic and powder CaWO4 are studied. The samples were synthesized via a solid-state method. Differential thermal analysis and thermogravimetric (DTA/TG) measurements indicate a minimum temperature of 700°C for calcination of precursors. The crystalline phase of the...

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