Abstract
Electrospinning process is the useful and unique method to produce nanofibers from metal precursor and polymer solution by controlled viscosity. In this study, the NiZn ferrite nanofibers were prepared by electrospinning with a aqueous metal salts/polymer solution that contained polyvinyl pyrrolidone and Fe (Ⅲ) chloride, Ni (Ⅱ) acetate tetrahydrate and zinc acetate dihydrate in N,Ndimethylformamide. The applied electric field and spurting rate for spinning conditions were 10 ㎸, 2 ㎖/h, respectively. The obtained fibers were treated at 250℃ for 1 h to remove the polymer. Finally, the NiZn ferrite fibers were calcined at 600℃ for 3 h and annealed at 900~1200℃ in air. By tuning the viscosity of batch solution before electrospinning, we were able to control the microstructure of NiZn ferrite fiber in the range of 150~500 ㎚ at 770 cP. The primary particle size in 600℃ calcined ferrite fiber was about 10 ㎚. The properties of those NiZn ferrite fibers were determined from X-ray diffraction analysis, electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, thermal analysis, and magnetic measurement.
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