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A kind of mnzn ferrite magnetic core with dual characteristics and its manufacturing method

A technology of ferrite magnetism and manufacturing method, which is applied in the direction of inductor/transformer/magnet manufacturing, inorganic material magnetism, electrical components, etc. The effect of adjusting the difficulty

Active Publication Date: 2015-09-30
江门安磁电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, precise control of the oxygen content in the range below 0.6% has strict requirements on the kiln equipment and technical personnel, which is not conducive to the stable operation of mass production

Method used

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  • A kind of mnzn ferrite magnetic core with dual characteristics and its manufacturing method
  • A kind of mnzn ferrite magnetic core with dual characteristics and its manufacturing method
  • A kind of mnzn ferrite magnetic core with dual characteristics and its manufacturing method

Examples

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Effect test

example 1～8

[0050] 1) Using commercially available Fe 2 o 3 , Mn 3 o 4 , ZnO as the main component, according to the amount shown in Table 1 Fe 2 o 3 , MnO (raw material is Mn 3 o 4 ), ZnO and a certain proportion of Ni based on the main component 2 o 3 Place in a sand mill, add 90wt% water of the total weight of the powder to the previously weighed powder, stir and grind to mix evenly; after spray drying, heat up to 950°C at a speed of 180°C / h Burn for 2h;

[0051] 2) Based on the total weight of the pre-burned powder, add additives: 3500ppm of Co 2 o 3 , 30ppm SiO2 2 , 300ppm of CaCO 3 , 300ppm Nb 2 o 5 and 65wt% deionized water, 1.2wt% dispersant, and 0.8wt% defoamer for secondary grinding until the average particle size is 1.0±0.2mm;

[0052] 3) Based on the total weight of the powder after ball milling, add 7.7wt% polyvinyl alcohol solution to the powder, mix and granulate evenly, and use a 20-ton dry powder press to press the granules into a green sample;

[0053] 4)...

example 9～21

[0063] 1) as Fe 2 o 3 54.9mol%, MnO 37.1mol%, ZnO 8.0mol% as the main component formula weigh Fe 2 o 3 , Mn 3 o 4 The ZnO raw material is placed in a sand mill, and the first auxiliary material or the second auxiliary material or the first auxiliary material and the second auxiliary material and 90wt% water based on the total weight of the powder are added to the powder weighed above, stirred and Grind and mix evenly, and the amount of auxiliary materials added is shown in Table 2; after spray drying, heat up at a rate of 200°C / h to 1000°C for 1.5h;

[0064] 2) Based on the total weight of the pre-calcined powder, add the remaining auxiliary materials according to the addition amount shown in Table 2, and then add 67wt% deionized water, 1.1wt% dispersant, and 0.9wt% defoamer together Perform secondary grinding until the average particle size is 1.0±0.2mm;

[0065] 3) Based on the total weight of the powder after ball milling, add 8.2wt% polyvinyl alcohol solution to the...

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Abstract

The invention discloses a MnZn ferrite magnetic core with double characteristics and a manufacture method. The magnetic core consists of main components and auxiliary components. The main components consist of Fe2O3 54-56 mol%, ZnO 5-10 mol% and the balance manganese oxide, wherein the sum of the Fe2O3, the ZnO and the manganese oxide is 100 mol%. The auxiliary components comprise a first auxiliary material, a second auxiliary material, a third auxiliary material and a selectable fourth auxiliary material, wherein the first auxiliary material is an oxide of Co, the second auxiliary material is one of Ni2O3, NiO or Li2CO3, the third auxiliary material is selected from CaCO3 and Nb2O5, and the fourth auxiliary material is selected from SiO2, V2O5 and ZrO2. The shortcoming that a common MnZn power ferrite material cannot integrate multiple characteristics is overcome, the MnZn ferrite magnetic core has the double characteristics of high temperature and Bs and wide temperature and low loss, the unit volume loss Pcv (100kHz, 200mT) of the magnetic core at the temperature of 25 DEG C to 120 DEG C is smaller than 350 kW / m<3>, the lowest loss at the temperature of about 90 DEG C is 300 kW / m<3>, and the saturation magnetic flux density can reach to 450 mT at the temperature of 100 DEG C.

Description

technical field [0001] The invention relates to a MnZn soft ferrite material and a manufacturing method, in particular to a MnZn soft ferrite core with dual characteristics of high temperature, high Bs and wide temperature and low loss, and a manufacturing method. Background technique [0002] Soft magnetic ferrite is a kind of magnetic material with the most varieties, the most widely used and the largest consumption, and it is an important basic functional material in the electronic information industry. In the production and use of soft magnetic ferrite, MnZn ferrite is dominant, and the output of MnZn ferrite accounts for about 70% of the total output of soft ferrite. It is currently the most concerned and active soft magnetic material. field. In recent years, the development of MnZn ferrite materials has shifted from the in-depth improvement of a single performance to the horizontal expansion of multiple indicators at the same time. For example, power ferrite material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/34H01F41/02
Inventor 黄爱萍谭福清豆小明汪南东
Owner 江门安磁电子有限公司
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