Síntese e caracterização de nanopartículas de espinélio de aluminato de ferro (FeA12O4) obtidos por reação de combustão.

Abstract

The aluminized iron spinel (FeAl2O4) is a very promising compound, which has efficient properties, such as high ductility, presents good flexibility but is still little studied, mainly at the national level. This work aims to synthesize the iron aluminate spinel III (FeAl2O4) by means of the combustion synthesis and to characterize the material by X-ray diffraction (XRD) techniques and thermogravimetric analysis, and also conduct an educational study through a lecture / videos about the laboratory development of the FeAl2O4 phase and later to apply a knowledge questionnaire in a group of descriptive inorganic Chemistry in the degree of chemistry of the CFP / UFCG, campus Cajazeiras - PB. X-ray diffraction analyzes were carried out at two moments, initially with the powder produced directly from the synthesis and then with the same calcined at 400ºC / 4h in ambient atmosphere. The sample obtained directly from the synthesis formed a monophasic system with iron aluminate spinel structure (FeAl2O4). According to the XRD analysis, it was verified that the powder of amorphous characteristics showed a growth of the crystalline phase with the presence of the characteristic peaks of its structure. The XRD analysis of the material calcined at 400ºC / 4h determined an increase in the intensity of the peaks in the diffractogram, showing higher values of relative intensity, thus obtaining greater crystallinity. Based on the analysis of the questionnaires, it can be verified that a good part of the students submitted to this type of research is unaware or has little information about nanotechnology and similar topics. There is still some confusion in basic Chemistry principles by these chemistry graduates.