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Co2Z type ferrite material and preparation method thereof

A ferrite material and material technology, applied in the field of Co2Z type ferrite material and its preparation, can solve the problems of low resonance frequency of Z ferrite and the like

Inactive Publication Date: 2021-05-28
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional Co. 2 The preparation method of Z type soft magnetic ferrite, such as Co prepared by one-time solid phase sintering method and molten salt method 2 The resonance frequency of Z ferrite is low, usually around 1GHz, which is lower than the theoretical resonance frequency

Method used

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  • Co2Z type ferrite material and preparation method thereof
  • Co2Z type ferrite material and preparation method thereof
  • Co2Z type ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In this case Co 2 The preparation method of the Z-type ferrite material is as follows:

[0042] Raw material BaCO 3 , SrCO 3 , Fe 2 o 3 、Co 3 o 4 According to Ba 1.5 Sr 1.5 co 2 Fe 21.6 o 41 The ratio is matched. The raw materials are first dried in an oven for 10 hours (the drying temperature is 120°C), and the proportions are made 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, and the ball milling medium It is water, and the ratio of raw materials is 1:1).

[0043] Put the ball-milled powder into an oven for drying (drying temperature is 120°C). After drying, put the powder into an alumina crucible and put it into a high-temperature furnace for sintering. The heating rate is 5°C / min. The sintering temperature is 1280°C, and the sintering time is 2 hours.

[0044] The sintered powder is ground and passed through a 100-mesh sieve, and the sieved powd...

Embodiment 2

[0047] In this case Co 2 The preparation method of the Z-type ferrite material is as follows:

[0048] Raw material BaCO 3 , SrCO 3 , Fe 2 o 3 、Co 3 o 4 According to Ba 1.5 Sr 1.5 co 2 Fe 21.6 o 41 The ratio is matched. The raw materials are first dried in an oven for 10 hours (the drying temperature is 120°C), and the proportions are made 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, and the ball milling medium It is water, and the ratio of raw materials is 1:1).

[0049] Put the ball-milled powder into an oven for drying (drying temperature is 120°C). After drying, put the powder into an alumina crucible and put it into a high-temperature furnace for sintering. The heating rate is 5°C / min. The sintering temperature is 1280°C, and the sintering time is 2 hours.

[0050] The sintered powder is ground and passed through a 100-mesh sieve, and the sieved powd...

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Abstract

The invention discloses a Co2Z type ferrite material and a preparation method thereof. The chemical formula of the Co2Z type ferrite material is Ba<x>Sr<3-x>Co<2>Fe<y>O<41>, wherein x is greater than or equal to 1 and less than or equal to 2, and y is greater than or equal to 21.6 and less than or equal to 24. The resonance frequency of the ferrite material is 2.0 GHz to 4.0 GHz. The preparation method of the Co2Z type ferrite material comprises the following steps: 1) mixing and ball-milling a Ba source, a Sr source, a Co source and a Fe source according to the proportion; 2) sintering the material obtained by ball milling in the step 1) at 1200-1300 DEG C for the first time; and 3) granulating the material obtained by the first sintering in the step 2), carrying out compression molding, and carrying out second sintering at 1000-1150 DEG C to obtain the Co2Z type ferrite material. The Co2Z type ferrite material provided by the invention has the characteristics of low sintering temperature, high resonant frequency and small powder particle size during preparation.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a Co 2 Z-type ferrite material and preparation method thereof. Background technique [0002] In modern society, communication technology (especially 5G technology) has become a technological highland that countries all over the world are vying for. In this context, various electronic equipment and devices are developing towards miniaturization, light weight, and integration. The operating frequency of components is also constantly developing towards high frequency. Therefore, there is an urgent need for soft ferrite materials that can be applied to higher frequency bands. [0003] Common spinel ferrites such as Ni-Zn ferrite and Mn-Zn ferrite, due to the limitation of Snoek limit, the material can only work at frequencies below 300MHz. And the Z-type planar hexagonal ferrite (Co 2 Z) Due to its high Curie temperature, high quality factor, high initial permeability ...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622C04B35/64
CPCC04B35/2633C04B35/622C04B35/64C04B2235/3213C04B2235/3215C04B2235/3275C04B2235/5436
Inventor 史慧刚蔡庚轩薛德胜
Owner LANZHOU UNIVERSITY
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