Soft magnetic Mg-Zn ferrite material and its low temperature sintering technology

A soft magnetic ferrite, low temperature sintering technology, applied in the field of soft magnetic Mg-Zn ferrite material and its low temperature sintering process, can solve the problems of short service life of the kiln, low product qualification rate, increased cost, etc. The effect of superior performance, abundant resources and convenient supply

Active Publication Date: 2005-08-10
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of flux, the sintering temperature needs to reach 1320°C, the service life of the kiln is not lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh 47.5wt% Fe 2 o 3 , 30.0wt% MgO, 18.5wt% ZnO 0.6wt% Mn 3 o 4 , 3.0wt% CuO was uniformly mixed by an intensive mixer, and the mixing time was 20 minutes. After mixing, the particle size of the powder was controlled at 1.75 μm. The above uniformly mixed material powder is pelletized and added with 10% water to make a pellet with a diameter of 6mm and a strength of 70N. Pre-fire the above-mentioned pellets in a rotary kiln at a temperature of 900°C, and grind the above-mentioned pre-fired pellets into a particle size of 1.5 μm and a viscosity of 600mpa.s, specific gravity 2.20g / cm 3 Slurry with a water content of 30%; the crushing time is 50 minutes for the first grade and 50 minutes for the second grade. Add 9.5% PVA to the pulverized slurry and stir it in a mixing tank to make a sprayable slurry; the stirring time is 2 hours. The above-mentioned stirred slurry is made through a spray drying tower with a loose specific gravity of 1.45g / cm 3 , The water content...

Embodiment 2

[0049] Weigh 48.0wt% Fe 2 o 3 , 29.5wt% MgO, 18.0wt% ZnO 0.5wt% Mn 3 o 4 , 3.5wt% CuO was uniformly mixed by an intensive mixer, and the mixing time was 25 minutes. After mixing, the particle size of the powder was controlled at 1.7 μm. The above uniformly mixed material powder is pelletized and added with 15% water to make a pellet with a diameter of 6mm and a strength of 70N. The above-mentioned pellets are pre-fired in a rotary kiln at a temperature of 1050°C, and the above-mentioned pre-fired pellets are sand-milled with a particle size of 1.3 μm and a viscosity of 900mpa.s, specific gravity 2.10g / cm 3 Slurry with a water content of 34%; the crushing time is 50 minutes for the first grade and 50 minutes for the second grade. Add 9.5% PVA to the pulverized slurry and stir it in a mixing tank to make a sprayable slurry; the stirring time is 2 hours. The above-mentioned stirred slurry is made through a spray drying tower with a loose specific gravity of 1.40g / cm 3 , Th...

Embodiment 3

[0051] Weigh 48.2wt% Fe 2 o 3 , 26.0wt% MgO, 20.9wt% ZnO 0.6wt% Mn 3 o 4 , 3.7wt% CuO was uniformly mixed by an intensive mixer, and the mixing time was 30 minutes. After mixing, the particle size of the powder was controlled at 1.7 μm. The above uniformly mixed material powder is pelletized and added with 20% water to make a pellet with a diameter of 6mm and a strength of 70N. The above-mentioned pellets are pre-fired in a rotary kiln at a temperature of 1050°C, and the above-mentioned pre-fired pellets are sand-milled with a particle size of 1.2 μm and a viscosity of 1500mpa.s, specific gravity 1.90g / cm 3 Slurry with a water content of 37%; the crushing time is 50 minutes for the first grade and 50 minutes for the second grade. Add 9.5% PVA to the pulverized slurry and stir it in a mixing tank to make a sprayable slurry; the stirring time is 2 hours. The above-mentioned stirred slurry is made through a spray drying tower with a loose specific gravity of 1.25g / cm 3 , M...

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Abstract

A soft-magnetic Mg-Zn ferrite is proportionally prepared from Fe2O3, MgO, ZnO, Mn3O4, flux and auxiliary through mixing and sintering at lower temp (1220 deg.C). Its advantages are high strength and properties, and high percentage of finished products.

Description

technical field [0001] The invention relates to a magnetic material and a manufacturing method thereof, in particular to a soft magnetic Mg-Zn ferrite material and a low-temperature sintering process thereof. Background technique [0002] The so-called soft magnetic materials refer to those magnetic materials with small coercive force and easy magnetization and demagnetization. The so-called soft means that these materials are easy to magnetize and exhibit "soft" magnetically. Soft magnetic materials are used in a wide range of applications. Because they are easy to magnetize and demagnetize, and have high magnetic permeability, they can play a good role in concentrating magnetic force lines, so soft magnetic materials are widely used as the path of magnetic force lines, that is, as magnetic permeable materials, such as transformers, sensors Iron core, magnetic shield, yoke iron for special magnetic circuit, etc. It has been half a century since the invention and practica...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/632C04B35/64
Inventor 何时金张爱国郭小东
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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