STUDY OF LOW-TEMPERATURE SINTERED NANO-CRYSTALLITE Mn-Cu-Zn FERRITE PREPARED BY CO-PRECIPITATION METHOD

Abstract

Active powder of Cu -substituted Mn-Zn ferrite was synthesized by soft chemical approach called co-precipitation method. The initial permeability, density, grain size, Curie temperature and dc resistivity were studied. X-ray diffraction (XRD) method confirmed the sample to be a single-phase spinel and of nano-structure (~ 65 nm). Further, scanning electron micrograph (SEM) also confirmed nano-phase and the uniformity of the particles. The initial permeability values did not exhibit much variation with temperature, except near Curie temperature where it falls sharply. The initial permeability was found to increase with the increase in sintering temperature. This is attributed to the increase in the grain size.

Effect of La3+ doping on the electric, dielectric and magnetic properties of cobalt ferrite processed by co-precipitation technique

“…Lanthanum-cobalt ferrites of composition CoLaxFe2−xO4 (x = 0, 0.1, 0.15, 0.2) were prepared by the co-precipitation method [17] Germany) and sodium hydroxide (96% Merck, India). These solutions were poured as quickly as possible into the boiling solution of NaOH under vigorous stirring produced by the glass mechanical stirrer (500 rpm).…”

Investigations of lanthanum doping on magnetic properties of nano cobalt ferrites

“…La-Co ferrite of composition CoLa x Fe 2-x O 4 (x=0, 0.1, 0.15, 0.2, 0.25, 0.3) was prepared by the co-precipitation method [6,7] 13-14. Cobalt nitrate, lanthanum nitrate and iron (III) nitrate were taken in accurate stoichiometric proportions and dissolved and then added to sodium hydroxide solution already prepared. The solution was poured as quickly as possible into the boiling solution of NaOH under vigorous stirring produced by the glass mechanical stirrer (500 rpm).…”

A review on MnZn ferrites: Synthesis, characterization and applications

“…This is most favorable method for nanoparticles synthesis as the products in this method are homogeneous, highly pure and have narrow size distribution. Various synthesis techniques are used to prepare MnZn ferrite nanoparticles [152][153][154][155][156][157][158][159][160]such as sol-gel mthod [161][162][163][164], polyol process [165],co-precipitation method [104,166,167], hydrothermal method [113], citrate precursor method [122], solid state reaction method [118], auto-combustion method, ceramic processing method [139]. The techniques to synthesize MnZn ferrites are shown in figure 6.…”

“…These radiations reduce the efficiency and performance of electronic instruments and thus decrease their lifetime and safety. As MnZn ferrite belongs to the class of soft ferrites having high electrochemical stability, high permeability, high saturation magnetization and low power losses, it is used in many electronic applications [65,79,128,167,199,209,210].Ferrite nanoparticles can be used in the radar absorbing devices due to their high value of curie temperature and temperature stability. Also the ferrite nanoparticles are environmentally safe that make their use easier in the radar absorbing devices.…”