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MnZn ferrite material of high initial permeability and low loss and preparation method thereof

A magnetic permeability and low loss technology, applied in the field of oxide magnetic materials, to achieve the effect of low loss characteristics, low cost, and high initial magnetic permeability

Active Publication Date: 2012-05-02
苏州天铭磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the shortcomings of the existing MnZn ferrite that cannot have low loss and high initial permeability at the same time, and provides a low loss and high permeability MnZn ferrite with initial magnetic permeability characteristics and preparation method thereof

Method used

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  • MnZn ferrite material of high initial permeability and low loss and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Ingredients: ingredients are made according to the main components and content. Weigh the Fe with a purity of 99.5wt% 2 o 3 , Mn with a purity of 99% 3 o 4 , ZnO with a purity of 99.7%, and the mass ratio of the three is 60:29:11;

[0032] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:ethanol=2:1:1, and then wet mill in a ball mill. The ball milling time is 30 minutes, and the rotation speed is 400r / min;

[0033] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 900°C, and the holding time is 4 hours;

[0034] (4) Secondary ball milling and doping: Weigh the pre-fired powder and auxiliary components, chemically pure SnO 2 : 0.01wt%, TiO 2 : 0.03wt%, Er 2 o 3 : 0.03wt%, Bi 2 o 3 : 0.06wt%, PbO: 0.08wt% is put into the ball mill jar, then according to the mass ratio is ball: material: the ratio of ethanol=2: 1: 1, add pellet respe...

Embodiment 2

[0039] (1) Ingredients: ingredients are made according to the main components and content. Weigh the Fe with a purity of 98.5wt% 2 o 3 , MnO with a purity of 98%, ZnO with a purity of 99.7%, the molar ratio of the three is 69:15.5:15.5;

[0040] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:ethanol=2:1:1, and then wet mill in a ball mill. The ball milling time is 30 minutes, and the rotation speed is 500r / min;

[0041] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 800°C, and the holding time is 3 hours;

[0042] (4) Secondary ball milling and doping: Weigh the pre-fired powder and auxiliary components, chemically pure SnO 2 : 0.03wt%, TiO 2 : 0.01wt%, Er 2 o 3 : 0.05wt%, Bi 2 o 3 : 0.05wt%, PbO: 0.03wt% is put into the ball mill jar, then according to the mass ratio is ball: material: the ratio of ethanol=2: 1: 1, add pellet respectively...

Embodiment 3

[0047] (1) Ingredients: ingredients are made according to the main components and content. Weigh the Fe with a purity of 98.5wt% 2 o 3 , MnO with a purity of 98%, ZnO with a purity of 99.7%, the molar ratio of the three is 73:12:15;

[0048] (2) Primary ball milling: put the powder into a ball mill jar according to the mass ratio of ball:material:ethanol=2:1:1, and then wet mill in a ball mill. The ball milling time is 40 minutes, and the rotation speed is 600r / min;

[0049] (3) Pre-burning: put the ball-milled powder into a resistance furnace for pre-burning, the pre-burning temperature is 900°C, and the holding time is 1h;

[0050] (4) Secondary ball milling and doping: Weigh the pre-fired powder and auxiliary components, chemically pure SnO 2 : 0.04wt%, TiO 2 : 0.02wt%, Er 2 o 3 : 0.03wt%, Bi 2 o 3 : 0.05wt%, PbO: 0.06wt% is put into the ball mill jar, then according to the mass ratio is ball: material: the ratio of ethanol=2: 1: 1, add pellet respectively, then ad...

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Abstract

The invention discloses an MnZn ferrite magnetic material with high initial permeability and low loss and a preparation method thereof, the MnZn ferrite is prepared by principal components and auxiliary components, and the principal components and the mass percentage by oxide are as follows: 60-73wt% of Fe2O3, 13-33wt% of ZnO and balance Mn3O4; the auxiliary components are five oxides: 0.01-0.04wt% of SnO2, 0.01-0.04wt% of TiO2, 0.03-0.05wt% of Er2O3, 0.05-0.08wt% of Bi2O3 and 0.03-0.08wt% of PbO; and the soft magnetic ferrite material has not only high initial permeability but also low loss,and has excellent comprehensive soft magnetic properties.

Description

technical field [0001] The invention relates to a MnZn ferrite material, in particular to a ferrite material with high magnetic permeability and low loss and a preparation method thereof, belonging to the technical field of oxide magnetic materials. technical background [0002] With the rapid development of electronic technology, anti-electromagnetic interference noise filters, electronic circuit broadband transformers, integrated service data network (ISDN), local area network (LAN), wide area network (WAN), pulse transformers and background lighting require a large number of High magnetic permeability MnZn ferrite material with excellent characteristics. In addition, with the development trend of miniaturization, multi-function, integration and high frequency of power electronic equipment, the hysteresis loss, eddy current loss and residual loss of MnZn ferrite under the alternating electromagnetic field will cause the core temperature to rapidly increase. As the temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34C04B35/38C04B35/622
Inventor 魏瑞明戴建中陆静军邹仲鹤
Owner 苏州天铭磁业有限公司