Electromagnetic properties of nanocrystalline Mn-Zn ferrite synthesized from spent Zn-C battery via Egg-white route

摘要

Nanocrystalline Mn0.8Zn0.2Fe2O4 was successfully synthesized via egg-white auto-combustion routeusing waste Zn-C batteries as raw materials. The objective of this recycling process is to turn thecontents of these waste batteries into valuable magnetic products, which realizes both environmentaland economic benefits. Differential thermal analysis-thermogravimetry (DTA-TG) measurements wereused to characterize the auto-combustion route and ferrite formation. X-ray diffraction (XRD), Fouriertransform infrared (FT-IR), transmission electron microscopy (TEM) techniques were used tocharacterize the produced ferrite. The obtained weak magnetic properties measured via vibratingsample magnetometer (VSM) indicated the effect of the entire egg-white fuel on the combustionprocess and ferrite formation. Ac-conductivity measurements indicated semiconducting properties withtransition at about 555 K attributed to change in the magnetic characterization from ferro- toparamagnetic one. The dielectric measurements as a function of frequency and temperature showed agradual decrease with increasing frequency, which considered as a normal behavior of all ferrites.