High magnetic conductive low temperature sintered NiCuZn ferrite material

A ferrite material, low-temperature sintering technology, applied in the direction of inorganic material magnetism, can solve the problems of easy re-agglomeration, particle size reduction, and cost reduction, and achieve the effects of improving mechanical strength, increasing sintering density, and reducing manufacturing costs

Inactive Publication Date: 2011-02-09
SHANDONG ZHONGRUI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reducing the average particle size of the powder to the submicron or nanometer level increases the specific surface area of ​​the particles and improves the activity of the powder, but simply reducing the particle size will put higher requirements on the equipment, which is not conducive to cost reduction , and there is a certain limit to reducing the particle size simply by adjusting the process, the particle size cannot be reduced indefinitely, and when the particle size drops to a certain level, it is easy to reunite

Method used

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  • High magnetic conductive low temperature sintered NiCuZn ferrite material
  • High magnetic conductive low temperature sintered NiCuZn ferrite material
  • High magnetic conductive low temperature sintered NiCuZn ferrite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Selection of raw materials: Provide low-temperature sintered NiCuZn ferrite materials to select industrially pure Fe 2 o 3 , ZnO, NiO, CuO.

[0044] 2) Composition design and weighing: according to Fe 2 o 3 48mol%, ZnO is 33mol%, CuO is 10mol%, NiO is 9mol%, and the corresponding weight of Fe is weighed 2 o 3 , ZnO, CuO and NiO.

[0045] 3) Mixing of raw materials: Put the weighed raw materials into a sand mill, add deionized water of equal weight, and sand mill for 0.5 hours.

[0046] 4) Primary spray drying and granulation: add about 10% PVA solution (concentration is about 10%) to the raw material slurry, and perform primary spray drying and granulation.

[0047] 5) Pre-calcination: pre-calcine the primary spray-dried granulated powder through a rotary kiln, and the pre-calcination temperature is 780°C.

[0048] 6) Addition of impurities: using MoO 3 、In 2 o 3 As an additive, where MoO 3 The percentage content is: 0.20wt%, and In 2 o 3 The percentage ...

Embodiment 2

[0057] 1) Material selection: Provide low-temperature sintered NiZn ferrite material selection of industrially pure Fe 2 o 3 , ZnO, NiO and CuO.

[0058] 2) Composition design and weighing: according to Fe 2 o 3 48mol%, ZnO is 35mol%, CuO is 12mol%, NiO is 5mol%, and the corresponding weight of Fe is weighed 2 o 3 , ZnO, CuO and NiO.

[0059] 3) Mixing of raw materials: Put the weighed raw materials into a sand mill, add deionized water of equal weight, and sand mill for 0.5 hour.

[0060] 4) Primary spray drying and granulation: add about 10% PVA solution (concentration is about 10%) to the raw material slurry, and perform primary spray drying and granulation.

[0061] 5) Pre-calcination: the primary spray-dried granulated powder is pre-fired through a rotary kiln, and the pre-calcination temperature is 740°C.

[0062] 6) Addition of impurities:

[0063] Using MoO 3 、In 2 o 3 As an additive, where MoO 3 The percentage content is: 0.18wt%, and In 2 o 3 The percen...

Embodiment 3

[0073] 1) Material selection: Provide low-temperature sintered NiZn ferrite material selection of industrially pure Fe 2 o 3 , ZnO, NiO and CuO.

[0074] 2) Composition design and weighing: according to the formula Fe 2 o 3 is 48.5mol%, ZnO is 36.5mol%, CuO is 3.5mol%, NiO is 11.5mol%, and the corresponding weight of Fe 2 o 3 , ZnO, CuO and NiO.

[0075] 3) Mixing of raw materials: Put the weighed raw materials into a sand mill, add deionized water of equal weight, and sand mill for 0.5 hour.

[0076]4) Primary spray drying and granulation: add about 10% PVA solution (concentration is about 10%) to the raw material slurry, and perform primary spray drying and granulation.

[0077] 5) Pre-calcination: The primary spray-dried granulated powder is pre-fired through a rotary kiln, and the pre-calcination temperature is 800°C.

[0078] 6) Addition of impurities (ingredients): MoO is used 3 、In 2 o 3 As an additive, where MoO 3 The percentage content is: 0.25wt%, and In ...

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PUM

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Abstract

The invention relates to a NiCuZn ferrite material with high magnetic permeability and low-temperature sintering, whose main phase is a spinel structure, the compositions which are calculated through oxide content are that Fe2O3 is 41-52.8mol%, ZuO is 20-45mol%, and CuO is 1-14mol%, NiO is 2-15mol%. MoO3 and In2O3 are used as additive based on the above materials, MoO3: 0.15wt%-0.25wt% is added, and In2O3: 0.12wt%-0.45wt% is added. Ferrite blanks which are prepared are put in a furnace to be sintered, the sintering temperature is 910-950 DEG C, the sintering time is 6-20 hours, and the temperature is kept for 2-4 hours.

Description

technical field [0001] The invention relates to a preparation method of high magnetic permeability low-temperature sintered NiCuZn ferrite material. Background technique [0002] With the continuous development of electronic equipment in the direction of miniaturization, light weight, and thinning, in addition to adapting to modern communications, network technology, computers, audio-visual equipment, electronic office equipment, automotive electronic systems, military and aerospace electronics, and electromagnetic compatibility (EMC) In recent years, developed countries have invested a lot of human and financial resources to research and develop chip technology for electronic components. Chip inductors, one of the three major passive devices, have also made great progress. [0003] Structurally, there are two types of chip inductors, one is a laminated chip inductor, and the other is a wire-wound chip inductor. Each of these two chip inductors has its outstanding advantag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/11C04B35/26C04B35/64
Inventor 陆明岳
Owner SHANDONG ZHONGRUI ELECTRONICS
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