INVESTIGADORES
MARTINEZ GARCIA Ricardo
congresos y reuniones científicas
Título:
Effect of the heat treatment conditions on the synthesis of Sr-hexaferrite
Autor/es:
RICARDO MARTINEZ GARCIA; V. BILOVOL; L. M. SOCOLOVSKY
Lugar:
Campinas, Sao Paulo, Brasil
Reunión:
Workshop; Reunión de Usuarios del LNLS (Laboratorio Nacional de Luz Sincrotrón); 2011
Institución organizadora:
Laboratorio Nacional de Luz Sincrotrón
Resumen:
The effect of heat treatment conditions under oxygen atmosphere on the SrFe12O19 synthesis is analyzed. We study the effect of the partial evacuation of the decompositions gases of the organometallic precursor on the phase composition of different samples. An accurate structural analysis of samples obtained between 250ºC and 600ºC is reported. From the structural analysis several secondary phases are identified. The amount of secondary phases can be manipulated through the control of the heat treatment conditions, and therefore, this constitutes a methodology to manipulate the composition and the magnetic properties of the nanopowders. The quantitative determination of phases is performed by structural refinement of X-ray powder patterns, by using Rietveld analysis. Magnetic study is done by Magnetization vs. Applied Magnetic Field at room temperature.
