Synthesis of NiCuZn ferrite nanoparticles and microwave absorption characterization

Abstract

This study aimed at the low temperature synthesis of Ni x Cu 0.5−x Zn 0.5 Fe 2 O 4 ferrite nanoparticles using the citrate precursor method and the reflectivity characterization of Radar absorbing materials. The NiCuZn phase obtained at 350 • C by the Rietveld method showed homogeneous nanoparticle formation. The analysis of particle size and the critical diameter of the domains indicated monodomain formation on nanometric scale. Vibrating sample magnetometry showed that adding copper to NiZn ferrite decreases magnetization saturation and the calcining temperature. Reflectivity measures taken by the wave guide method, obtained absorption radiation of 96.6% for x = 0.3 at 12 GHz.

Fabrication and microwave absorbing properties of Ni–Zn spinel ferrites

“…One of the frequently used methods to tune the complex permeability of spinel ferrites is to dope the ferrites with many metallic ions, such as Cu, Zn, Co, Li, Mn, Mg, etc. [33][34][35][36][37][38]. For this purpose, some attempts were made to verify the correlation between the material constants, permittivity (ε r = ε − jε ) and permeability ( r = − j ) and the microwave absorption in the sintered ferrites that contain divalent metal ions [1,[33][34][35][36][37][38][39][40][41][42][43][44].…”

A study on Cu substituted Ni–Cu–Zn ferrites synthesized using egg-white

“…Lima et al [11] synthesized Ni x Cu 0.5−x Zn 0.5 Fe 2 O 4 ferrite (0.2 ≤ x ≤ 0.4) nano-particles using the citrate precursor method. Vibrating sample magnetometry (VSM) showed that adding copper to NiZn ferrite decreases magnetization saturation and the calcining temperature.…”

Correlation between coercive field and radiation attenuation in Ni and Mg ferrite doped with Mn and Co

“…In order to boost technological headway it is needed the combination of components with proper electric and magnetic properties [2,5,6,7]. However, as to oxide ceramics such as ferrites, the composition, the synthesis parameters and the intrinsic characteristics (magnetic saturation, permeability and magnetic permittivity) are associated with their structural properties [6,8,9,10]. This has become decisive for obtaining high performance technological materials [11][12][13][14][15][16][17] .…”