Microwave hydrothermal synthesis of nanosize PbO added Mg-Cu-Zn ferrites |
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Authors: | V Seetha Rama Raju S R Murthy F Gao Q Lu S Komarneni |
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Affiliation: | (1) Department of Physics, Osmania University, Hyderabad, 500 007, India;(2) Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA |
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Abstract: | Lead oxide added Mg-Cu-Zn ferrite powders were prepared by a co-precipitation method in a microwave-hydrothermal (M-H) system.
The synthesized ferrite samples were characterized by powder X-ray diffraction (XRD), Infrared spectroscopy (IR), transmission
electron microscopy (TEM) and Differential scanning calorimeter (DSC). Nanophase ferrites (~10–20 nm) with high surface area
were synthesized at a low temperature of 160°C after a treatment time of 1 hour. The nano-powder was sintered at 900°C/4h
in air atmosphere. The variations of the sintered density, electrical resistivity, initial permeability, and saturation magnetization
with additive concentration have been investigated and the obtained results were compared with one prepared by the conventional
ceramic method. It is found that the addition of PbO improves sintered density, electrical resistivity and permeability. |
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