Fabrication of PbFe12O19 nanoparticles and study of their structural, magnetic and dielectric properties

• Published in: Journal of magnetism and magnetic materials Vol. 399; pp. 130 - 142
• Main Authors: Mousavi Ghahfarokhi, S.E., Rostami, Z.A., Kazeminezhad, I.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2016
• Subjects: Annealing temperature; Annealing time; Dielectic properties; Lead hexaferrite nanoparticles; Magnetic properties; Structure properties; Annealing temperature; Structure properties; Lead hexaferrite nanoparticles; Dielectic properties; Annealing time; Magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2015.09.063

In this study, M-type Lead hexaferrite (PbFe12O19) nanoparticles were prepared by a sol–gel method and the prepared powders were annealed at 700–1000°C for 1, 1.5, 2, 2.5 and 3h. The Lead hexaferrite powders were characterized using thermogravimetry-differential thermal analysis, X-ray diffraction, scanning electron microscopy, LCR meter, vibrating sample magnetometer, and Fourier transforms infrared spectroscopy. The size of the nanoparticles was increased with the annealing temparature. The results reveal that the best annealing temperature and annealing time for preparing PbFe12O19 nanoparticles at 800°C and 3h are obtained. The infrared spectra measured in range of 4000–400cm−1 exhibit stretching modes of metal ions in tetrahedral site at 580–550cm−1 and octahedral site at 470–430cm−1. The variation in ac conductivity (σac) with frequency shows that the electrical conductivity in these ferrites is mainly attributed to the electron hopping mechanism. [Display omitted] •We synthesize M-type Lead hexaferrite (PbFe12O19) by sol–gel method..•We study the role of annealing temperature and annealing time on the morphology, size, structure, magnetic and dielectric properties of PbFe12O10 nanoparticles.•The results of dielectric measurement of all samples show that with increasing frequency, dielectric constant, dielectric loss, and electrical ac conductivity decreases.