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Anisotropic Co2Z type hexagonal ferrite magnetic core, and preparation method thereof

A hexagonal ferrite, anisotropic technology, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc., can solve the problems of low operating frequency, restricting the development and application of ferrite magnetic powder cores, etc., to achieve high production efficiency, Achieve miniaturization and high quality factor effect

Inactive Publication Date: 2017-10-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the working frequency of the above two types of ferrite cores is low, which restricts the further development and application of ferrite powder cores.

Method used

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  • Anisotropic Co2Z type hexagonal ferrite magnetic core, and preparation method thereof
  • Anisotropic Co2Z type hexagonal ferrite magnetic core, and preparation method thereof
  • Anisotropic Co2Z type hexagonal ferrite magnetic core, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to Co 2 The structural formula of Z-type ferrite is 3BaO 2CoO 12Fe 2 o 3 Ratio Weighing Raw BaCO 3 、Co 2 o 3 , Fe 2 o 3 , adding ball milling medium zirconia balls and performing ball milling and mixing for 5 hours, drying, pulverizing and sieving the obtained materials. Pre-burn the sieved material at 1300°C for 2 hours, then add the sintering aid Bi to the pre-calcined material 2 o 3 , and perform secondary ball milling, where Bi 2 o 3 The addition amount is 1% of the weight of the material after pre-burning, and the ball milling time is 2 hours.

[0026] Get 100g of the material after secondary ball milling and add 50g of PVB solution with a concentration of 40wt% to it, after mixing evenly, add plasticizer dimethyl phthalate 0.5g and dispersant polyethylene glycol octylphenyl Ether 2g, prepared into cast slurry.

[0027] The casting slurry was cast on the PET film by a casting process, and after being horizontally oriented in a magnetic field, ...

Embodiment 2

[0031] According to Co 2 The structural formula of Z-type ferrite is 3BaO 2CoO 12Fe 2 o 3 Ratio Weighing Raw BaCO 3 、Co 2 o 3 , Fe 2 o 3 , adding ball milling medium zirconia balls and performing ball milling and mixing for 5.5 hours, drying, pulverizing and sieving the obtained materials. Pre-burn the sieved material at 1250°C for 2.5 hours, then add the sintering aid Bi to the pre-calcined material 2 o 3 , and perform secondary ball milling, where Bi 2 o 3 The addition amount is 3% of the weight of the material after pre-burning, and the ball milling time is 3 hours.

[0032] Get 100g of the material after secondary ball milling and add 45g of PVB solution with a concentration of 45wt% to it, after mixing evenly, add plasticizer dimethyl phthalate 0.25g and dispersant polyethylene glycol octylphenyl Ether 1.5g, prepared into cast slurry.

[0033] The cast slurry was cast on the PET film by a cast process, and after being horizontally oriented in a magnetic field,...

Embodiment 3

[0037] According to Co 2 The structural formula of Z-type ferrite is 3BaO 2CoO 12Fe 2 o 3 Ratio Weighing Raw BaCO 3 、Co 2 o 3 , Fe 2 o 3 , adding ball milling medium zirconia balls and performing ball milling and mixing for 6 hours, drying, pulverizing and sieving the obtained materials. Pre-burn the sieved material at 1200°C for 3 hours, then add the sintering aid Bi to the pre-calcined material 2 o 3 , and perform secondary ball milling, where Bi 2 o 3 The addition amount is 2% of the weight of the material after pre-burning, and the ball milling time is 4 hours.

[0038] Get 100g of the material after secondary ball milling and add 40g of PVB solution with a concentration of 50wt% to it, after mixing evenly, add plasticizer dimethyl phthalate 0.2g and dispersant polyethylene glycol octylphenyl Ether 1g, prepared into cast slurry.

[0039] The cast slurry was cast on the PET film by a cast process, and after being horizontally oriented in a magnetic field, it was d...

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Abstract

The invention discloses an anisotropic Co2Z type hexagonal ferrite magnetic core, and a preparation method thereof. The anisotropic Co2Z type hexagonal ferrite magnetic core is mainly prepared from three raw materials including BaCO3, Co2O3, Fe2O3; and the structural formula is 3BaO.2CoO.12Fe2O3. The preparation method comprises following steps: the raw materials are weighed at the chemical weight ratio, and are subjected to ball milling, drying, smashing, and sieving; after sieving, an obtained mixture is subjected to presintering, a sintering agent is added, and an obtained mixed material is subjected to secondary ball milling; after secondary ball milling, an obtained product is mixed with PVB solution, a plasticizer, and a dispersant so as to obtain a tape casting slurry; tape casting is carried on PET film in a magnetic field in the horizontal direction so as to obtain tape casted sheets with uniform orientation; the tape casted sheets are subjected to stamping, excess glue is removed, and sintering is carried out so as to obtain the anisotropic Co2Z type hexagonal ferrite magnetic core. The anisotropic Co2Z type hexagonal ferrite magnetic core still possesses high magnetic permeability and high quality at 1GHz, and can be used for preparing ultrahigh frequency chip inductors.

Description

technical field [0001] The invention belongs to the technical field of preparation of ferrite core materials, in particular to an anisotropic Co 2 Z-type hexagonal ferrite core and its preparation method. Background technique [0002] The rapid development of electronics and information technology has put forward higher requirements for the performance of magnetic components. The miniaturization, high frequency, and power of high-performance magnetic components have become a development trend, and the core material is the key to magnetic components. [0003] Ferrite cores are generally composed of iron oxide and one or more other metal oxides or carbonates. They have the advantages of high magnetic permeability and low loss, and are widely used in electronic devices. Currently, CN 101859622 A discloses a method for manufacturing an intermediate-frequency low-loss MnZn ferrite core. The manufactured MnZn ferrite core has lower loss and higher saturation magnetic flux density...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622H01F1/03
CPCC04B35/2633C04B35/622C04B2235/3215C04B2235/3275H01F1/0315
Inventor 颜铄清邓联文廖聪维黄生祥贺君刘胜
Owner CENT SOUTH UNIV
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