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Study on Preparation and Characterization of Doped High Performance Ni-Zn Ferrites Materials

Author: GeHuiLin
Tutor: WangChengBiao；PengZhiJian
School: Chinese Geology University (Beijing)
Course: Mechanical Engineering
Keywords: Ni-Zn ferrite Step synthesis method Doping Electrical properties Magnetic properties
CLC: TM277
Type: Master's thesis
Year: 2010
Downloads: 126
Quote: 0
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Abstract


Spinel structure Ni-Zn ferrite is a soft magnetic material with a widely used, it has a high magnetization, high magnetic permeability, low loss, high Curie temperature and high resistivity and other characteristics, particularly suitable for the high frequency range using . Further improve the performance of high-power soft ferrite high frequency, the direction of China's development of high-end soft magnetic ferrite products. The selection of the appropriate preparation process and the additive is the key to obtaining high-performance, high-quality Ni-Zn ferrite. To adapt to the reality of industrial production as much as possible, to avoid large-scale manufacturing and replacement of process equipment, reduce costs, and improve the electromagnetic properties of Ni-Zn ferrite step synthesis method to improve the preparation process of the Ni-Zn ferrite, and in -xO4 Ni0.5Zn0.5MxFe2 (M = Al, based on Pr, W; x = 0 to 1) for the basic recipe, research Al2O3 Pr6O11 and WO3 doping on the electromagnetic properties of Ni-Zn ferrite the following conclusions: (1) with the traditional two-step synthesis and the new \The ferrite obtained by the \body or less, but the initial permeability is large, a smaller dielectric constant (ε?) and dielectric loss (tanδ). (2) obtained by using the \With the increase of the amount of Al2O3 doped Ni-Zn ferrite, Ms, the real part of the complex magnetic permeability (μ ') and an imaginary part (μ \significant increase of Al2O3 doping amount was increased and then decreased trend. larger frequencies greater than 10 MHz, μ 'doped Al2O3 Ni-Zn ferrite. Al2O3 doped Ni-Zn iron the increased Oxygen fr, ε? and tanδ are reduced, increasing the utilization of high-frequency ferrite range. (3) using the \In addition to the formation of spinel phase with the second phase PrFeO3 Pr6O11 doping amount increases, Ms decreases, Hc increases, Tc was fluctuating between 308 ~ 320 ℃. Pr6O11 doping, μ 'and μ \(4) using the \Increasing WO3 doping amount, Ms first increases and then decreases the Hc, ε?, And tanδ first decreases and then increases, Tc increases, μ 'and μ \When the amount of WO3 doping x = 0.02, ε? and tanδ minimum of.

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CLC: > Industrial Technology > Electrotechnical > Electrical materials > Magnetic materials,ferrite > Ferrite,oxide magnetic materials
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