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High-frequency high-magnetic-field low-loss manganese-zinc ferrite material and preparation method thereof

A technology of manganese-zinc ferrite and high magnetic field, which is applied in the direction of inductance/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc. It can solve the problems of unsatisfactory use requirements and large increase in loss, so as to reduce the proportion and sinter Effects of temperature optimization and improved loss performance

Active Publication Date: 2021-04-16
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the loss mechanism of manganese zinc ferrite in the prior art changes under high frequency and high magnetic field strength, and the bottom of the loss valley moves forward, resulting in a large increase in loss at high temperature, which cannot meet the use requirements. Provide a high-frequency high-magnetic field low-loss manganese-zinc ferrite material and its preparation method, through formula development and trace element modification, and improve the preparation method, the loss of high-frequency high-magnetic field manganese-zinc ferrite at high temperature is reduced

Method used

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  • High-frequency high-magnetic-field low-loss manganese-zinc ferrite material and preparation method thereof
  • High-frequency high-magnetic-field low-loss manganese-zinc ferrite material and preparation method thereof
  • High-frequency high-magnetic-field low-loss manganese-zinc ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Ingredients and sanding: Weigh 54.2% Fe by mole percentage 2 O 3, 40.8% MnO and 5% ZnO, put it into a sand mill and add deionized water to carry out wet mixing and sand grinding. The mass ratio of material ball to water during sand grinding is 1:5:2, and the mill speed is 70 rpm / min, sanding time 80min; after sanding, dry at 105°C for 48h to obtain a sanding abrasive;

[0041] (2) Pre-burning: Put the primary sand abrasive in the rotary kiln, raise the temperature to 920°C at a rate of 2°C / min, keep it warm for 3 hours, then turn off the power and cool down with the furnace to obtain the pre-fired material;

[0042] (3) Secondary sanding: add additives to the calcined material: 2000ppmCo 3 O 4 , 1000ppm TiO 2 , 300ppm SiO 2 , 1500ppm CaCO 3 and 500ppmZrO 2 , then add deionized water and put it into the sand mill for secondary wet sand milling. The mass ratio of ball to water during the secondary sand mill is 1:5.2:1.2, the mill speed is 45 rpm, and the sand ...

Embodiment 2

[0046] (1) Ingredients and sanding: take 53% Fe by mole percentage 2 O 3 , 43% MnO and 4% ZnO, put it into a sand mill and add deionized water to carry out wet mixing and sand grinding. The mass ratio of material ball to water during sand grinding is 1:5.2:1.5, and the mill speed is 65 rpm / min, sanding time 90min; after sanding, dry at 100°C for 50h to obtain a sanding abrasive;

[0047] (2) Pre-burning: Put the primary sand abrasive in the rotary kiln, raise the temperature to 900°C at a rate of 1.5°C / min, keep it warm for 3.5 hours, then turn off the power and cool down with the furnace to obtain the pre-fired material;

[0048] (3) Secondary sanding: add additives to the calcined material: 1800ppmCo 3 O 4 , 1200ppm TiO 2 , 250ppm SiO 2 , 1600ppm CaCO 3 and 450ppmZrO 2 , then add deionized water and put it into the sand mill for secondary wet sand grinding. The mass ratio of material ball to water during the secondary sand grinding is 1:5:2, the mill speed is 40 rpm,...

Embodiment 3

[0052] (1) Ingredients and sanding: Weigh 55% Fe by mole percentage 2 O 3 , 39% MnO and 6% ZnO, put it into a sand mill and add deionized water to carry out wet mixing and sand grinding. The mass ratio of material ball to water during sand grinding is 1:5.5:2, and the mill speed is 75 rpm / min, sanding time 60min; after sanding, dry at 110°C for 40h to obtain a sanding abrasive;

[0053] (2) Pre-burning: Put the primary sand abrasive in the rotary kiln, raise the temperature to 950°C at a rate of 2.5°C / min, keep it warm for 2.5 hours, then turn off the power and cool down with the furnace to obtain the pre-fired material;

[0054] (3) Secondary sanding: add additives to the calcined material: 2200ppmCo 3 O 4 , 800ppm TiO 2 , 350ppm SiO 2 , 1400ppm CaCO 3 and 550ppmZrO 2 , then add deionized water and put it into the sand mill to carry out secondary wet sand grinding. The mass ratio of material ball to water during the secondary sand grinding is 1:5.5:2, the mill speed i...

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Abstract

The invention discloses a high-frequency high-magnetic-field low-loss manganese-zinc ferrite material and a preparation method thereof. The high-frequency high-magnetic-field low-loss manganese-zinc ferrite material is prepared from a main component and an additive. The main component comprises the following components in percentage by mole: 53-55% of Fe2O3, 39-43% of MnO and 4-6% of ZnO; and the additive comprises Co3O4 and TiO2. The preparation method comprises the following steps: (1) burdening and sanding; (2) pre-sintering; (3) carrying out secondary sanding; (4) granulating and forming; and (5) sintering, namely sintering a blank at the temperature of 1,200 to 1,250 DEG C under the condition that the oxygen partial pressure is controlled to be 3-5 vol% to obtain the high-frequency high-magnetic-field low-loss manganese-zinc ferrite material. According to the invention, through formula development, trace element modification and improvement of the preparation method, the loss of the high-frequency high-magnetic-field manganese-zinc ferrite at high temperature is reduced.

Description

technical field [0001] The invention relates to the field of ferrite technology, in particular to a high-frequency high-magnetic field low-loss manganese-zinc ferrite material and a preparation method thereof. Background technique [0002] MnZn ferrite core is the core component of a large number of electronic components. The development trend of modern electronic components requires small size, high magnetic permeability and high operating frequency. Therefore, MnZn ferrite core needs to increase the frequency of use, and also The need to keep the core volume small can only be achieved by increasing the magnetic field strength. [0003] MnZn ferrite in the prior art is usually Fe 2 O 3 , MnO, ZnO as raw materials, and add many additives, for example, a kind of "Wide temperature, low loss, high impedance MnZn soft magnetic ferrite material and preparation method" disclosed in the Chinese patent literature, its announcement number CN108530050A, the patent in the iron Oxyge...

Claims

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Application Information

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IPC IPC(8): C04B35/38H01F1/34H01F41/00C04B35/64
Inventor 严正信厉永平
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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