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Soft magnetic manganese-zinc ferrite material with ultrahigh magnetic permeability and preparation method thereof

A technology of manganese-zinc ferrite and magnetic permeability, which is applied in the direction of magnetism of inorganic materials, can solve the problem of difficult to have ultra-high permeability ferrite materials, and can reduce the magnetic crystal anisotropy constant and increase the density. , the effect of ultra-high permeability

Inactive Publication Date: 2017-01-11
上海康顺磁性元件厂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] With the increasing miniaturization of electronic machines, the requirements for miniaturization and chipping of electronic components are becoming increasingly urgent. However, it is difficult for the soft magnetic manganese zinc ferrite materials produced by the existing methods to have ultra-high magnetic permeability. Oxygen material

Method used

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  • Soft magnetic manganese-zinc ferrite material with ultrahigh magnetic permeability and preparation method thereof
  • Soft magnetic manganese-zinc ferrite material with ultrahigh magnetic permeability and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for preparing an ultrahigh magnetic permeability soft magnetic manganese zinc ferrite material, the specific steps are as follows:

[0030] (1) Mixing: According to the components and mole percentages of the main ingredient formula in the raw materials, weigh 51-55% of iron oxide, 15-20% of zinc oxide, the remainder of manganese oxide and trace element CaCO 3 (Primary mixing plus CaCO 3 , secondary sanding without adding CaCO 3 process), red sand and black sand were mixed for 40 minutes to 1 hour to obtain a powder with uniform main ingredients and high sintering activity; the particle size of the mixed powder was controlled at about 1.0-1.4 μm.

[0031] (2) Pre-burning: Put the above mixed powder into the rotary kiln for pre-burning, the pre-fired temperature is 800-950°C, the pre-fired time is 40-70 minutes, the flow rate of the mixed powder is controlled at about 6kg / min, and the rotary kiln speed is 5-20 rev / min, make the red mixed powder react initially ...

Embodiment 2～12

[0039] Using the steps and preparation method of Example 1, different proportions of main components and addition amounts of trace additives (as shown in Table 1) were selected to prepare samples respectively.

Embodiment 16

[0050] A method for preparing a wide-temperature soft magnetic manganese-zinc ferrite material with high magnetic permeability and good low-temperature characteristics, the specific steps are as follows:

[0051] (1) Mixing: According to the components and mole percentages of the main ingredient formula in the raw materials, weigh 55% of iron oxide, 15% of zinc oxide, and the remainder of manganese oxide, and use a strong mixer to mix for 2 hours to obtain a powder containing the main ingredient ;The particle size of the mixed powder is controlled at about 1.0-1.5 μm, the purpose is to make the raw materials mix evenly, so as to facilitate the complete preliminary solid-phase reaction during pre-calcination;

[0052] (2) Pre-burning: Put the powder of the above mixed main components into the rotary kiln for pre-burning, the pre-burning temperature is 900°C, the pre-burning time is 70 minutes, the flow rate of the mixed powder is controlled at about 4 kg / min, and the rotary kiln...

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Abstract

The invention relates to a soft magnetic manganese-zinc ferrite material with ultrahigh magnetic permeability and a preparation method thereof. The soft magnetic manganese-zinc ferrite material comprises a main material and a trace additive, wherein the main material comprises the following components by mole percentage: 51%-55% of ferrite, 15%-20% of zinc oxide and the balance of manganese oxide; the trace additive is a mixture of SnO2, In2O3, Bi2O3, Mo2O3 and CaCO3; and the adding quantity of the trace additive is 500-1800ppm of total weight of the material. Compared with the prior art, the method has the advantage that a sintering method is optimized through a formula and a doping orthogonal test; the soft magnetic manganese-zinc ferrite material of which the ultrahigh magnetic permeability ui is greater than 18,000 (25 DEG C, 10mV) and the initial magnetic permeability ui is 18,000 can be produced.

Description

technical field [0001] The invention belongs to the technical field of oxide magnetic materials, and in particular relates to a soft magnetic manganese-zinc ferrite material with ultra-high magnetic permeability and a preparation method thereof. Background technique [0002] At present, the development trend of electronic components is miniaturization and light weight. The high magnetic permeability of ultra-high permeability can significantly reduce the volume of electronic transformers, which is conducive to the miniaturization and light weight of electronic components, which is in line with the development trend of electronic components. At the same time, when using materials with high ultra-high magnetic permeability. The specified inductance can be obtained with fewer coil turns, which can effectively reduce the DC resistance of the coil and the loss caused by it. Therefore, research on high magnetic permeability manganese-zinc ferrite materials at home and abroad attac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/34C04B35/26C04B35/622
Inventor 黄国平陈俊
Owner 上海康顺磁性元件厂有限公司
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