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Mn-Zn ferrite with wide temperature range and high magnetic conductivity and its prepn process

A magnetic permeability and ferrite technology, which is applied in the field of manganese zinc ferrite with wide temperature and high magnetic permeability and its preparation, can solve the problems of high cost and large amount of CoO doping, and achieve consistency Good, low porosity, increased activity

Inactive Publication Date: 2006-08-02
RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of CoO doped, the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 53.3mol% Fe 2 o 3 , 38.3mol% of MnO and 8.4mol% of ZnO, wherein the raw material form of MnO is Mn 3 o 4 , Mn 3 o 4 Jinrui CR-06 model is used, its Mn%≥71%, the iron red adopts domestic Baosteel red, its Fe 2 o 3 %≥99.2%, the manufacturer of ZnO is Shanghai Jinghua, and its weight percentage content ZnO%≥99.7%. After mixing the above raw materials, put them into a sand mill and stir them together to control the average particle size to 0.9μm±0.2μm. After one spray, pre-fire at 900°C±30°C with an electric rotary kiln. Then the calcined material is put into a sand mill for secondary sand grinding. During the sand grinding process, pure water, dispersant and defoamer are added, and additives are added. Relative to the total amount of the main components, the content of each substance in the additives is The weight percentage content is respectively: CaCO 3 0.05wt%, V 2 o 5 0.05wt%, Nb 2 o 5 0.05wt%, Bi 2 o 3 0.04wt%, TiO 2 0.02wt%, Co 2 o 3 0.1wt%, a...

Embodiment 2

[0024]Weigh 53.9mol% Fe 2 o 3 , 39.1mol% MnO and 7.9mol% ZnO, put into the sand mill and stir, wherein the raw material form of MnO is Mn 3 o 4 , the average particle size is controlled to be 0.9μm±0.2μm, and pre-fired at 900°C±30°C after one spraying with an electric rotary kiln. Then the pre-fired material is put into a sand mill for secondary sand grinding. During the sand grinding process, pure water, dispersant and defoamer are added, and additives are added. Relative to the total amount of the main components, the weight percentage of each substance in the additive Contents are: CaCO 3 0.02wt%, V 2 o 5 0.02wt%, Nb 2 o 5 0.01wt%, Bi 2 o 3 0.03wt%, TiO 2 0.02wt%, Co 2 o 3 0.3wt%, and the average particle size Φ of secondary sand grinding is controlled to be 0.9μm±0.2μm. Finally, secondary spraying is carried out to obtain MnZn ferrite particle powder.

[0025] Take the granules and press them into φ25mm×φ15mm×7.5mm annular magnetic core and UYF13 magnetic cor...

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Abstract

The present invention is Mn-Zn ferrite with high magnetic permeability in wide temperature range and its preparation process. The Mn-Zn ferrite consists of main components including Fe2O3 51-56 mol%, MnO 34-40 mol% and ZnO 6-12 mol%, and supplementary components. The Mn-Zn ferrite has relatively high initial magnetic permeability, power consumption difference lower than 70 kW / cu m in the temperature range of 25-120 deg.c at 100 KHz and 200 mT, minimum power consumption below 350 kW / cu m in the said temperature range, remanence below 85 mT at Hú¢1194 A / m and 25 deg.c, and excellent DC superposition characteristic.

Description

【Technical field】 [0001] The invention relates to a MnZn-based ferrite and a preparation method thereof, in particular to a manganese-zinc-based ferrite with wide temperature and high magnetic permeability and a preparation method thereof. 【Background technique】 [0002] With the development of electronic devices in the direction of thinner, lighter, smaller, mobile, integrated and multifunctional, soft ferrite magnetic materials have been more and more widely used in these devices. Among them, manganese-zinc ferrite magnetic materials with high frequency, wide temperature, high DC superposition, high magnetic permeability, low power loss and other properties have increasingly become indispensable components in power transformers, office automation, communications and other fields. Considering the working environment of the power supply, etc., it is required to have small loss and permeability changes in a wide temperature range, and have high stability and high reliability....

Claims

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Application Information

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IPC IPC(8): C04B35/26H01F1/34
Inventor 傅膑范仲康刘运盘良三
Owner RUYUAN DONGYANGGUANG MAGNETIC MATERIAL
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