Volume 36, Issue 2 (Journal of Advanced Materials-Summer 2017)                   jame 2017, 36(2): 67-80 | Back to browse issues page

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Mousavi Ghahfarokhi S E, Bazdar F, kazeminezhad I. The Effect of Annealing Temperature on the Structural, Magnetic and Dielectric Properties of PbFe11.8Ni0.2O19 Nanoparticles. jame 2017; 36 (2) :67-80
URL: http://jame.iut.ac.ir/article-1-735-en.html
Department of Physics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran , musavi_ebrahim@yahoo.co.uk
Abstract:   (5844 Views)

In this paper, Ni-doped lead hexaferrites (PbFe12-xNixO19) nanoparticles with x = 0.2 were prepared by sol- gel method. Then, the effect of annealing temperature on its structural, magnetic and dielectric properties was studied. First, the dryed gel was evaluated by Thermogravimetry-Differential Thermal Analysis (TG/DTA) and then, the structural morphology, magnetic and dielectric properties of samples have been characterized by Fourier Transform Infrared (FT-IR) spectroscopy, X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Vibrating Sample Magnetometer (VSM) and LCR meter. The results of x-ray diffraction patterns show that by increasing annealing temperature up to 800 °C, PbFe11.8Ni0.2O19 phase percentage in the samples increases. Also, by increasing annealing temperature, the magnetization increases because the unwanted phases disappear and pure and single-phase lead hexaferrite are formed. By increasing frequency, first the AC electrical conductivity of the samples decreases and then increases. These variations have been explained by Maxwell- Wanger model. The result measurements show that the best sample is PbFe11.8Ni0.2O19 with annealing temperature of 800 °C for 3 h.

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Type of Study: Research | Subject: Nanomaterials
Received: 2016/01/23 | Accepted: 2016/10/1 | Published: 2017/09/5

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