Abstract
Acicular manganese zinc ferrite fine particles were made from small acicular α-FeOOH, Mn(C5H7O2)3, and Zn(C5H7O2)2. The long axis of these fine particles was oriented in parallel to the external magnetic field of 557kA/m, and then formed into multi-layered toroidal core. The green compact was sintered at 1200°C for 6 hours in air, and then cooled in a nitrogen atmosphere. The relative bulk density of the sintering body was improved from 87.0% to 90.2%. Crystallites consisted of the {110} plane were aligned along the upper plane of toroidal core of crystal-oriented manganese zinc ferrite. The initial permeability of crystal-oriented manganese zinc ferrite was 2240 at 0.1 MHz. The sample exhibited excellent high frequency magnetic properties.
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More From: Journal of the Japan Society of Powder and Powder Metallurgy
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