Síntesis de la espinela ZnCrxFe2-xO4(0 ≤ x ≤ 1) por combustión en solución y estudio termodinámico de la estabilidad de fases
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Corporación Universitaria Lasallista, Editorial Lasallista.
Abstract
Introduction. Spinels are metal oxides
generally used for their chemical,
electrical and magnetic properties.
The occupation of transition metals
in tetrahedral and octahedral
positions generates characteristics of
technological interest and the study of the
interaction of the material with external
fields is motivating and justifiable. The
synthesis of spinels has commonly been
using the traditional method (ceramic),
but to obtain better control in the particle
size alternative methods have been
chosen, among them the method of
combustion in solution. Objective.
Synthesize the spinel by the combustion
method in solution and study the phase
transitions as a function of temperature.
Materials and methods. The compound
was synthesized (for x = 0, 0.2, 0.4, 0.6,
0.8, 1.0) by combustion in solution, using
metallic nitrates and glycine as fuel,
generating an ignition around 1500 ° C
approximately. Results The samples
were characterized morphologically
(SEM), compositionally (EDS),
structurally (XRD), thermogravimetrically
(TGA) and calorimetrically (DSC). The
characterization was carried out for
precalcined samples (without thermal
treatment), heated to 750 and 850 °
C, this in order to compare the results
obtained in the characterizations of
the compounds and thereby identify
the physical changes generated by the
formation of secondary phases .
Description
Keywords
Corporación Universitaria Lasallista, Área Metropolitana del Valle de Aburrá, Minerales, Metales, Tratamiento térmico, Transición de fase
Citation
Revista Producción + Limpia -Vol. 13 No 2 - 2018