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Preparation technology of high-performance nickel-zinc ferrite material

A nickel-zinc ferrite and preparation technology, which is applied in the fields of magnetism of inorganic materials, manufacture of inductors/transformers/magnets, electrical components, etc., can solve problems such as unsatisfactory magnetic properties, achieve resistance to grain boundary movement, increase sintering density, Grain Boundary Obvious Effect

Inactive Publication Date: 2019-06-07
ZHONGDE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-permeability ferrite cores for broadband transformers in electronic circuits, pulse transformers in the fields of integrated business data networks, local area networks, wide area networks, background lighting, and photovoltaic inverters for common-mode filter inductors, due to the miniaturization of transformers, etc. Therefore, higher requirements are put forward for the magnetic properties of ferrite. The magnetic properties of soft ferrite in the prior art cannot meet the needs of the prior art. Therefore, it is urgent to design soft ferrite with better magnetic properties. Materials to solve problems in existing technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation process of a high-performance nickel-zinc ferrite material, comprising the steps of:

[0021] S1. Mix the main ingredients iron oxide, zinc oxide, and nickel oxide in a molar ratio of 51:36:15, then add the first additive with a weight of 0.2% of the main ingredient, and dry mix to obtain a mixture; the first additive is obtained by oxidation Molybdenum, diyttrium trioxide, tin oxide, titanium dioxide;

[0022] S2. Pre-burning the mixture at 780°C for 2 hours, then pre-burning at 880°C for 2 hours, and cooling to obtain the pre-fired material;

[0023] S3. Mix the calcined material with the second additive in a mass ratio of 95:0.3, and then perform wet pulverization to obtain a pulverized material; the pulverization time is 90 minutes; the second additive consists of lead oxide, boron oxide, vanadium pentoxide, Calcium oxide, silicon dioxide, bismuth oxide;

[0024] S4, adding polyvinyl alcohol to the pulverized material, and then adopting spray granula...

Embodiment 2

[0028] A preparation process of a high-performance nickel-zinc ferrite material, comprising the steps of:

[0029] S1. Mix the main ingredients iron oxide, zinc oxide, and nickel oxide in a molar ratio of 53:34:16, then add the first additive with a weight of 0.1% of the main ingredient, and dry mix to obtain a mixed material; the first additive is obtained by oxidation Molybdenum, diyttrium trioxide, tin oxide, titanium dioxide;

[0030] S2. Pre-calcining the mixture at 800°C for 1 hour, then pre-burning at 900°C for 1 hour, and obtaining the pre-fired material after cooling;

[0031] S3. Mix the calcined material with the second additive in a mass ratio of 100:0.1, and then perform wet pulverization to obtain a pulverized material; the pulverization time is 120 minutes; the second additive is composed of lead oxide, boron oxide, vanadium pentoxide, Calcium oxide, silicon dioxide, bismuth oxide;

[0032] S4, adding polyvinyl alcohol to the pulverized material, and then adop...

Embodiment 3

[0036] A preparation process of a high-performance nickel-zinc ferrite material, comprising the steps of:

[0037] S1. Mix the main ingredients iron oxide, zinc oxide, and nickel oxide in a molar ratio of 51:36:15, then add the first additive with a weight of 0.2% of the main ingredient, and dry mix to obtain a mixed material; the first additive is made of Molybdenum oxide, diyttrium trioxide, tin oxide and titanium dioxide are composed in a mass ratio of 5:4:10:13;

[0038] S2. Pre-burning the mixture at 780°C for 2 hours, then pre-burning at 880°C for 2 hours, and cooling to obtain the pre-fired material;

[0039] S3. Mix the calcined material with the second additive at a mass ratio of 95:0.3, and then perform wet pulverization to obtain pulverized material; the particle size of the pulverized material is controlled between 1.5-2um; the pulverized time is 90min; the second The additive is composed of lead oxide, boron oxide, vanadium pentoxide, calcium oxide, silicon dioxi...

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Abstract

The invention relates to the technical field of magnetic materials, and discloses a preparation technology of a high-performance nickel-zinc ferrite material. The preparation technology comprises thefollowing steps: mixing main materials comprising iron oxide, zinc oxide and nickel oxide, then adding a first additive, and carrying out dry mixing to obtain a mixture, wherein the first additive iscomposed of molybdenum oxide, diyttrium trioxide, tin oxide and titanium dioxide; pre-sintering the mixture, and cooling the pre-sintered mixture to obtain a pre-sintered material; mixing the pre-sintered material with a second additive, and then performing wet crushing to obtain a crushed material, wherein the second additive is composed of lead oxide, boron oxide, vanadium pentoxide, calcium oxide, silicon dioxide ad bismuth oxide; adding polyvinyl alcohol to the crushed material, and carrying out spray granulation to obtain granules; adding the granules into a mold, and pressing the granules to form a blank; and carrying out microwave sintering treatment on the blank, and cooling the treated blank to room temperature to obtain the high-performance nickel-zinc ferrite material. The high-performance nickel-zinc ferrite material prepared in the present invention has excellent magnetic properties.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a preparation process of a high-performance nickel-zinc ferrite material. Background technique [0002] With the rapid development of digital communication technology and optical fiber communication technology, traditional analog communication equipment is constantly updated and eliminated. High-permeability ferrite cores for broadband transformers in electronic circuits, pulse transformers in the fields of integrated business data networks, local area networks, wide area networks, background lighting, and photovoltaic inverters for common-mode filter inductors, due to the miniaturization of transformers, etc. Therefore, higher requirements are put forward for the magnetic properties of ferrite. The magnetic properties of soft ferrite in the prior art cannot meet the needs of the prior art. Therefore, it is urgent to design soft ferrite with better magnetic properties....

Claims

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Application Information

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IPC IPC(8): C04B35/30C04B35/64H01F1/36H01F41/00
Inventor 瞿德林王久如李丛俊
Owner ZHONGDE ELECTRONICS
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