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Magnetic Properties of NiZn-ferrite Synthesized from The Refined Waste Iron Oxide Catalyst  

Park, Sang-Il (Department of Materials Science & Engineering Seoul National University of Technology)
Lee, Hyo-Sook (Minerals & Materials Processing Division, Korea Institute of Geoscinece & Mineral Resources)
Choi, Hyun-Seok (CHIP Division, Sam Wha Electronics Co.)
Hwang, Yeon (Department of Materials Science & Engineering Seoul National University of Technology)
Publication Information
Korean Journal of Crystallography / v.14, no.1, 2003 , pp. 1-6 More about this Journal
Abstract
NiZn-ferrites were synthesized from the waste catalysts. which were by product of styrene monomer process and buried underground as an industrial wastes, and their magnetic properties were investigated. Nickel oxide and zinc oxide powders were mixed with finely ground waste catalysts, and spinel type ferrite was obtained by calcination at 900℃ and sintering at 1325℃ for 5 hours. The initial permeabilities were measured and reflection losses were calculated from S-parameters for the composition of Ni/sub x/Zn/sub 1-x/Fe₂O₄(x=0.36, 0.50, 0.66) and (Ni/sub 0.5/Zn/sub 0.5)/sub 1-y/Fe/sub 2+y/O₄(y=-0.02, 0, 0.02).
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