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Preparation method of Co2Z type ferrite sintered sheet

A technology of ferrite and sintered sheets, applied in the direction of inductance/transformer/magnet manufacturing, magnetic objects, magnetic materials, etc., to meet the application requirements, good magnetic properties, and convenient operation

Pending Publication Date: 2021-08-27
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ferrite films prepared by these methods are very thin, usually below 1 μm, which is too thin for most devices used in high frequency applications.

Method used

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  • Preparation method of Co2Z type ferrite sintered sheet
  • Preparation method of Co2Z type ferrite sintered sheet
  • Preparation method of Co2Z type ferrite sintered sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] In this case Co 2 The preparation method of Z-type ferrite sintered sheet is as follows:

[0065] Preparation of powder: the raw material is analytically pure BaCO 3 , SrCO 3 , Fe 2 o 3 、Co 3 o 4 , the ratio is according to Ba 1.5 Sr 1.5 co 2 Fe 21.6 o 41 For calculation, the raw materials are first dried in an oven for 10 hours at a drying temperature of 120°C. The proportioning is carried out according to the above ingredients, and then put into a ball mill tank for ball milling. The balls are steel balls (the ratio of material to ball is 1:10 , the ball milling medium is water, and the ratio of mass to raw material is 1:1).

[0066] Put the ball-milled powder into an oven for drying at a drying temperature of 120°C. After drying, put the powder into an alumina crucible and put it into a high-temperature furnace for sintering. The sintering temperature is 1300°C and the sintering time is 4 Hours, the heating rate was 5°C / min.

[0067] After sintering, the...

Embodiment 2

[0071] In this case Co 2 The difference between the preparation method of the Z-type ferrite sintered sheet and that of Example 1 is that the second sintering in this example is held at a final sintering temperature of 1150° C. for 10 hours, and the rest are the same as in Example 1.

Embodiment 3

[0073] In this case Co 2 The difference between the preparation method of the Z-type ferrite sintered sheet and that of Example 1 is that the second sintering in this example is held at a final sintering temperature of 1150° C. for 5 hours, and the rest are the same as in Example 1.

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Abstract

The invention discloses a Co2Z type ferrite sintered sheet preparation method, which comprises: 1) mixing a barium source, a strontium source, a cobalt source and an iron source according to the ratio of BaxSr3-xCo2FeyO41, carrying out first ball milling, carrying out first sintering, and carrying out second ball milling to obtain a powder material; wherein 1 < = x < = 2; 21.6 < = y < = 24; 2) mixing the powder obtained in the step 1) with a binder, carrying out third ball milling, and carrying out tape casting on the obtained material to obtain a green body; and 3) sintering the green body obtained in the step 2) for the second time. The preparation method of the Co2Z type ferrite sintered sheet has the advantages of being simple in process and convenient to operate, and the prepared ferrite sintered sheet is good in magnetic performance, capable of meeting the application requirement under high frequency and wide in market prospect.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a Co 2 A preparation method of a Z-type ferrite sintered sheet. Background technique [0002] With the development of information technology, electronic equipment and devices are developing towards miniaturization, light weight and integration, and the operating frequency of passive components (such as inductors) in electronic equipment is also developing towards high frequency. Soft ferrite materials for higher frequencies. From the classification point of view, currently widely used are mainly spinel soft ferrite and planar hexagonal soft ferrite. Among them, spinel-type soft magnetic ferrite, such as: Mn-Zn, Ni-Zn-based ferrite, is limited by the Snoek limit, and its use frequency is below 300MHz. [0003] Z-type planar hexagonal soft magnetic ferrite has two different magnetic crystal anisotropy fields in the crystal, and the anisotropy field outside the favored...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/34H01F41/02
CPCC04B35/2633C04B35/622H01F1/344H01F41/02C04B2235/3215C04B2235/3213C04B2235/3277C04B2235/3272C04B2235/6025C04B2235/612C04B2235/656C04B2235/6567C04B2235/6562
Inventor 史慧刚吴科蔡庚轩
Owner LANZHOU UNIVERSITY
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