| Summary: | 碩士 === 國立臺北科技大學 === 材料及資源工程系研究所 === 100 === Title：Effects of the dopants on the magnetization of Ni-Zn ferrites Page：73
School：National Taipei University of Technology
Department：Institute of Materials Science and Engineering
Time：January, 2012 Degree：Master
Researcher：Kai-Mou Chou Advisor：Sea-Fue Wang
Keywords：Saturated magnetization、Quality factor、Initial permeability
Ferrites including Ni0.5-0.5xZn0.5-0.5xAxFe2O4 (x=0~0.15), Ni0.4Zn0.6-2xBxFe2+xO4 (x=0~0.15), Ni0.4Zn0.4B0.1CxFe2.1-xO4 (x=0~075), Ni0.4Zn0.4+xB0.1ExFe2.1-2xO4 (x=0~0.075) and Ni0.4Zn0.4+xB0.1DxFe2.1-2xO4 (x=0~0.075) have been prepared by solid-state reaction.
The magnetic properties and microstructural evolution of the ferrites were explored through examining the sintered samples with maximum density. Experimental results show that Ni0.5-0.5xZn0.5-0.5xAxFe2O4 ferrites with x=0.05 exhibited the highest saturated magnetization of 76.5 emu/g. Ni0.4Zn0.6-2xBxFe2+xO4 ferrites at x=0.15 reached the highest saturated magnetization of 82.7 emu/g. Ni0.4Zn0.4B0.1CxFe2.1-xO4 ferrites exhibited the highest saturated magnetization of 80.6 emu/g at x=0.025. Ni0.4Zn0.4+xB0.1DxFe2.1-2xO4 ferrites exhibit the highest saturated magnetization of 78.8 emu/g at x=0.025. Ni0.4Zn0.4+xB0.1ExFe2.1-2xO4 ferrites exhibit the highest saturated magnetization of 79.5 emu/g at x=0.025.
In the study, Ni0.4Zn0.425B0.1E0.025Fe2.05O4 ferrite showed a saturated magnetization of 79.5 emu/g, an initial permeability of 319 at 796 KHz and a quality factor of 53.5 at 796 KHz, which qualifies for use in ferrite-core inductors.
In the study, Ni0.4Zn0.425B0.1E0.025Fe2.05O4 ferrite showed a saturated magnetization of 79.5 emu/g, an initial permeability of 319 at 796 KHz and a quality factor of 53.5 at 796 KHz, which qualifies for use in ferrite-core inductors.
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