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Preparation method for high-performance manganese zinc ferrite powder

A high-performance manganese-zinc and manufacturing method technology, which is applied in the field of wet manufacturing of manganese-zinc ferrite powder, can solve the problems of powder change, affecting performance, particle size and moisture content, etc.

Active Publication Date: 2012-07-04
SHANGHAI BAOSTEEL MAGNETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is to provide a method for manufacturing high-performance manganese-zinc ferrite powder, which solves the defects that the particle size and moisture content are not controlled in the process of raw material production, and the change of powder and moisture absorption affect the performance.

Method used

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  • Preparation method for high-performance manganese zinc ferrite powder
  • Preparation method for high-performance manganese zinc ferrite powder
  • Preparation method for high-performance manganese zinc ferrite powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Molebi Fe 2 o 3 : 55%, ZnO: 6.8%, NiO: 1.5%, the rest is MnO ratio converted to mass percentage feeding, MnO converted to Mn 3 o 4 , the raw material initial D50 particle size is: Fe 2 o 3 : 1.4μm; ZnO: 1.0μm; Mn 3 o 4 : 1.2 μm; NiO: 1.2 μm.

[0043]as attached figure 1 As shown, after being dispersed by the method of the present invention and mixed by horizontal sand milling, the particle size of the mixture is D50: 0.8 μm, D90: 1.3 μm. After one spray granulation, the chloride ion content of the pre-burned material is 60ppm, after coarse crushing D50: 1.5μm, D90: 4.5μm, after fine grinding by horizontal sand mill D50: 1.0μm, D90: 2.5μm, fine Add SiO when pulverizing 2 , CaCO 3 , Nb 2 o 5 、Co 3 o 4 , ZrO, Ta 2 o 5 , V 2 o 5 、 Bi 2 o 3 、TiO 2 One or several of them are added with PVA, followed by secondary spray granulation, drying and freezing, and the moisture content of the powder is 0.02% to 0.025%.

[0044] Press the powder prepared above into...

Embodiment 2

[0047] Molebi Fe 2 o 3 : 52%, ZnO: 18.5%, the rest is the ratio of MnO converted to mass percentage feeding, MnO converted to Mn 3 o 4 , the raw material initial D50 particle size is: Fe 2 o 3 : 1.4μm; ZnO: 1.0μm; Mn 3 o 4 : 1.2 μm; NiO: 1.2 μm.

[0048] as attached figure 1 As shown, after dispersion and horizontal sand milling by the method of the present invention, the particle size of the mixture is D50: 0.8 μm, D90: 1.2 μm. After a spray granulation, the chloride ion content of the pre-burned material is 40ppm, after coarse crushing D50: 1.5μm, D90: 4.5μm, finely crushed by a horizontal sand mill D50: 0.8μm, D90: 2μm, finely crushed SiO 2 , CaCO 3 , Nb 2 o 5 、Co 3 o 4 , ZrO, Ta 2 o 5 , V 2 o 5 、 Bi 2 o 3 、TiO 2 One or several of them are added with PVA, followed by secondary spray granulation, drying and freezing, and the moisture content of the powder is 0.02% to 0.025%. Press the powder prepared above into a circular sample with an outer diameter o...

Embodiment 3

[0051] Molebi Fe 2 o 3 : 53%, ZnO: 10.5%, the rest is the ratio of MnO converted to mass percentage feeding, MnO converted to Mn 3 o 4 , the raw material initial D50 particle size is: Fe 2 o 3 : 1.4μm; ZnO: 1.0μm; Mn 3 o 4 : 1.2 μm; NiO: 1.2 μm.

[0052] as attached figure 1 As shown, after dispersion and horizontal sand milling by the method of the present invention, the particle size of the mixture is D50: 0.8 μm, D90: 1.2 μm. After a spray granulation, the chloride ion content of the pre-burned material is 40ppm, after coarse crushing D50: 1.5μm, D90: 4.5μm, after fine grinding by horizontal sand mill D50: 0.9μm, D90: 2.5μm, fine Add SiO when pulverizing 2 , CaCO 3 , Nb 2 o 5 、Co 3 o 4 , ZrO, Ta 2 o 5 , V 2 o 5 、 Bi 2 o 3 、TiO 2 One or several of them are added with PVA, followed by secondary spray granulation and drying and freezing. The moisture content of the powder is 0.02% to 0.025%. The powder prepared above is pressed into an outer diameter of 30...

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Abstract

The invention relates to a preparation method for high-performance manganese zinc ferrite powder and belongs to the field of preparation of manganese zinc ferrite. The preparation method for the high-performance manganese zinc ferrite powder comprises the following steps of: automatically weighing; dispersing; allowing raw materials to enter a horizontal sand mill, sanding and mixing; performing primary spray granulation; pre-sintering; coarsely crushing; allowing the dispersed coarse crushed materials to enter the horizontal sand mill and finely crushing; performing secondary spray granulation; drying; cooling; and adjusting the water content of the powder. The raw materials are sanded and mixed by the high-efficiency horizontal sand mill, so that the grain sizes of all the raw materials tend to be consistent; the grain size and the grain size distribution of the mixture is controlled strictly in the preparation process, so the microstructures of the raw materials are highly homogenized; and drying and cooling are performed after the secondary spray granulation, so that the high water content consistency of the powder is achieved, and the water stability of the powder before the powder is packaged is maintained.

Description

technical field [0001] The invention relates to a method for manufacturing manganese-zinc ferrite powder, in particular to a wet-type manufacturing method for manganese-zinc ferrite powder. Background technique [0002] At the end of the 1990s, the center of global soft ferrite production has shifted to China, and the development trend of miniaturization and high efficiency of electronic products, as well as the development of new energy, energy saving, environmental protection and communication markets have promoted new products of soft ferrite materials continuous development and technological progress. [0003] Among soft ferrites, MnZn ferrite has the characteristics of high magnetic permeability, high saturation magnetic flux density and low loss, and its usage accounts for more than 80% of the total amount of soft ferrite. [0004] The main formula and trace additives are internal factors for the production of new soft ferrite materials, and it is more important to ha...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/626
Inventor 刘国平陈元峻徐辉宇顾燮峰彭春兰唐俊睿
Owner SHANGHAI BAOSTEEL MAGNETICS
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