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http://dx.doi.org/10.4283/JKMS.2014.24.1.001

Structure and Magnetic Properties on Synthesis Route of Co2Z-type Barium Hexaferrite  

Baek, In Seung (Materials Device Laboratory, EMW)
Nam, In Tak (Department of Nano Applied Engineering, Kangwon National University)
Abstract
$Co_2Z$-type barium ferrites ($Ba_3Co_2Fe_{24}O_{41}$) were synthesized using variation method. First, M-type, $Co_2Y$-type and $Co_2Z$-type synthesized by hydrothermal method. Second, M- and Y-type precursors for synthesis of $Co_2Z$ hexaferrite by hydrothermal and ball milling method. the morphology, structure and magnetic properties of the barium ferrite particles were characterized using XRD, FESEM, VSM, impedance. As a result, Single phase of M-type and $Co_2Y$-type were obtained. Manufactured powders of M+Y ball milling, M+Y hydrothermal were similar to single phase of $Co_2Z$-type hexaferrite, all powders were obtained theoretical magnetization (50 emu/g). The largest initial permeability were obtained $Co_2Z$ hexaferrite synthesized by reagent precusor, With increasing calcination temperature was lowered the initial permeability. In another synthesis didn't almost that little change could be found.
Keywords
M-type hexaferrite; $Co_2Y$-type hexaferrite; $Co_2Z$-type hexaferrite; hydrothermal; ball milling;
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