Abstract

GUERRERO-SERRANO, A.L.; MIRABAL-GARCIA, M.; PALOMARES-SANCHEZ, S.A.  and  MARTINEZ-MENDOZA, J.R.. STUDY OF THE MAGNETIC PROPERTIES OF THE PB-HEXAFERRITE OBTAINED AS A SINGLE PHASE BY TWO METHODS OF PREPARATION. Rev. LatinAm. Metal. Mater. [online]. 2014, vol.34, n.1, pp.136-141. ISSN 0255-6952.

Pure lead hexaferrite (PbFe12O19) was obtained using two different methods of preparation, the solid state reaction and the chemical coprecipitation. It was found that the lead hexaferrite prepared by the solid state method is obtained without secondary phases by adding 33.09 % of lead oxide as an excess and sintering at 950 °C during one hour, also the pure lead hexaferrite prepared by the coprecipitation method is obtained at 700 °C without lead losses. We studied the structural and magnetic properties of both samples, a remarkable increase was found in the coercivity field of the sample prepared by coprecipitation as well as a reduction of the magnetic saturation, compared with the sample prepared by the solid state reaction. This behavior is attributed to the morphologic characteristics and the microstructure that is obtained in an inherently way to the preparation method.

Keywords : : Magnetic Ceramics; X-Rays; Rietveld refinement; Chemical coprecipitation; Solid-state reaction..

        · abstract in Spanish     · text in English     · English ( pdf )