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High-Bs high-strength manganese-zinc ferrite material and preparation method thereof

A manganese-zinc ferrite, high-strength technology, applied in the field of magnetic materials, can solve the problems of large changes in magnetic permeability, low Curie temperature, low magnet strength, etc., to reduce loss, increase high Bs, and improve superposition performance Effect

Active Publication Date: 2019-08-27
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of low magnet strength, large permeability change and low Curie temperature after loading current in traditional manganese zinc ferrite materials, the present invention provides a high Bs with high superposition, high Curie temperature and low loss High strength manganese zinc ferrite material

Method used

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  • High-Bs high-strength manganese-zinc ferrite material and preparation method thereof
  • High-Bs high-strength manganese-zinc ferrite material and preparation method thereof
  • High-Bs high-strength manganese-zinc ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Batching: take main component raw material and additive according to following proportioning ratio, and main component is made up of the raw material of the molar percentage shown in table 1: Fe 2 o 3 59.5mol%, MnO 26mol%, ZnO 12mol%, NiO 2.5mol%; based on the total amount of main components, the additive is composed of raw materials with the following content: SiO 2 60ppm, CaCO 3 600ppm, MoO 3 250ppm, V 2 o 5 400ppm, Nb 2 o 5 200ppm, ZrO 2 200ppm, SnO 2 400ppm; add deionized water to the sand mill for the main component raw materials to circulate, mix and crush, and spray dry to get the spray material;

[0042] (2) Pre-burning: Put the spray material into the pre-burning furnace of the rotary kiln and carry out pre-burning at 800°C for 5 hours, and the feed rate is 250kg / h to obtain the pre-burning material;

[0043] (3) Sanding: After adding additives to the pre-fired material, add deionized water for sanding to obtain sanding abrasives; the feed ...

Embodiment 2-6

[0051] The difference between Examples 2-6 and Example 1 is that the formulations of the main components are different, see Table 1, and the rest of the process conditions are identical.

[0052] The difference between Comparative Examples 1-6 and Example 1 is that the formulations of the main components are different, see Table 1, and the rest of the process conditions are identical.

Embodiment 7

[0067] (1) Batching: take main component raw material and additive according to following proportioning ratio, and main component is made up of the raw material of the molar percentage shown in table 2: Fe 2 o 3 56mol%, MnO 32mol%, ZnO 10.8mol%, NiO 1.2mol%; based on the total amount of main components, the additive is composed of raw materials with the following content: SiO2 60ppm, CaCO 3 600ppm, MoO 3 250ppm, V 2 o 5 400ppm, Nb 2 o 5 200ppm, ZrO 2 200ppm, SnO 2 400ppm; add deionized water to the sand mill for the main component raw materials to circulate, mix and crush, and spray dry to get the spray material;

[0068] (2) Pre-burning: put the spray material into the rotary kiln pre-burning furnace and carry out pre-burning at 750°C for 6 hours, and the feed rate is 240kg / h to obtain the pre-burning material;

[0069] (3) Sanding: After adding additives to the calcined material, add deionized water for sanding to obtain sanding abrasives; the feed rate is 22...

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Abstract

The invention relates to the technical field of magnetic materials, and provides a high-Bs high-strength manganese-zinc ferrite material in order to solve the problems that a traditional manganese-zinc ferrite material is low in magnetic strength, high in magnetic conductivity and low in Curie temperature after loading current. The material is composed of a main component and additives; the main component comprises, by mole percent, 56-63.8% of Fe2O3, 22-32% of MnO, 7-15% of ZnO and 1.2-4.2% of NiO; according to the total quantity of the main component, the additives comprise 10-100 ppm SiO2,200-1000 ppm CaCO3, 200-300 ppm MoO3, 250-600 ppm V2O5, 100-300 ppm Nb2O5, 100-300 ppm ZrO2 and 100-500 ppm SnO2. In the formula of the MnZn ferrite material, an iron-rich formula with the molar ratioof Fe2O3 higher than 55% is designed so that high-Bs can be greatly improved, and the superposition performance of the high-Bs can be further improved. Through synergistic interaction and mutual effects of the additives, the grain growth is uniform, the mechanical strength can be improved, the grain resistivity can be increased, and the loss of the MnZn ferrite material can be reduced.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a high-Bs high-strength manganese-zinc ferrite material and a preparation method thereof. Background technique [0002] In recent years, with the wide application of ferrite in various industries such as communication, IT industry, automobile industry, aerospace field, ship and national defense weaponry system, outdoor facilities of modern communication equipment, satellite and other equipment, smart phones and LED TV sets are used more and more, and the trend of large screen, thin thickness, and small volume is required, and the requirements for magnetic core components are also increased accordingly, requiring miniaturization, higher current superposition and higher strength. . Therefore, the components used are required to have excellent characteristics of high stackability, high stability, and long life. [0003] The existing MnZn ferrite materials have problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/63
CPCC04B35/2633C04B35/622C04B35/6303C04B2235/3208C04B2235/3239C04B2235/3244C04B2235/3251C04B2235/3256C04B2235/3262C04B2235/3272C04B2235/3279C04B2235/3284C04B2235/3293C04B2235/3418C04B2235/5427C04B2235/5436C04B2235/656C04B2235/6562C04B2235/6567C04B2235/6584C04B2235/96
Inventor 肖时勇赵旭卢飞翔
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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