Abstract
This study aimed at the low temperature synthesis of Ni x Cu 0.5− x Zn 0.5Fe 2O 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.
Highlights
The development of ferrite nanomaterials has been studied based on the synthesis of NiZn [1], MnZn [2], MgNi [3] among others [4,5]
One phase was formed for all compositions; it showed a peak of NiCuZn ferrite at low temperatures
The powder was calcined in an argon atmosphere at 1000 ◦C/3 h and 1100 ◦C/3 h
Summary
The development of ferrite nanomaterials has been studied based on the synthesis of NiZn [1], MnZn [2], MgNi [3] among others [4,5]. In recent years NiZn ferrite which contains various additives, has been synthesized as a compound of radar absorbing material composite. Yusoff and Abdullah [7] studied the absorption characteristics of undoped and doped samples (1 wt% CuO and MgO) of (Li0.5Fe0.5)0.7Zn0.3Fe2O4 ferrite in the 0.3–13.51 GHz frequency range. The addition of CuO and MgO has been found to increase the reflectivity and transmittivity of pure ferrite. Jian et al [8] studied the microwave absorbing properties of (Ni1−x−yCoxZny)Fe2O4 ferrite within the 0.5–14 GHz frequency range. They observed the absorbing frequency band (AFB) from 8.64 to 11.2 GHz. Cheng et al [9] synthesized nanoparticles of silver doped (Ni0.5Zn0.5Fe2O4) ferrite using the hydrothermal method
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