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A kind of nickel-zinc ferrite material and preparation method thereof

A nickel-zinc ferrite and raw material technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of low Curie temperature, low magnetic permeability, low high-frequency impedance, etc., and achieve low production cost, Achieve mass production, the effect of good high frequency impedance characteristics

Active Publication Date: 2021-04-20
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problems of low magnetic permeability, low high-frequency impedance and low Curie temperature of the existing nickel-zinc ferrite material, the present invention provides a high-performance anti-EMI material with high magnetic permeability, high Bs, and high impedance. Nickel zinc ferrite material

Method used

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  • A kind of nickel-zinc ferrite material and preparation method thereof
  • A kind of nickel-zinc ferrite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Ingredients: According to Table 1, Fe 2 o 3 , ZnO, NiO and CuO forms to calculate the ratio, weigh Fe 2 o 3 49.4mol%, NiO 12mol%, ZnO 32mol%, CuO 6.6mol%, as the main components;

[0039] (2) One-time sand milling: add the main component in the sand mill, then add deionized water for mixing and crushing, and the time is 40 minutes; after mixing evenly, carry out spray granulation to obtain spray material;

[0040] (3) pre-burning

[0041] Put the spray material into the rotary kiln pre-calcination furnace, and pre-fire it at 700°C for 5 hours, and the feed rate is 240 kg / hour;

[0042] (4) Secondary sanding

[0043] Add the following additive components by weight percentage of the pre-fired material in the pre-fired material: SiO 2 0.006wt%, CaCO 3 0.15wt%, V 2 o 5 0.08wt%, Bi 2 o 3 0.12wt%, then put the powder into a sand mill and add deionized water for secondary sand milling, the feed rate is 240Kg / hour (calculated as dry powder); the particle size ...

Embodiment 2-7

[0051] The difference between Examples 2-7 and Example 1 is that the formulations of the main components are different, as shown in Table 1, and the rest of the processes are identical.

Embodiment 8-9

[0058] The difference between Examples 8-9 and Example 1 is that the formulations of the additives are different, as shown in Table 2, and the rest of the processes are identical.

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Abstract

The invention relates to the technical field of soft magnetic ferrite, and provides a nickel-zinc ferrite material and its preparation in order to solve the problems of low magnetic permeability, low high-frequency impedance and low Curie temperature of existing nickel-zinc ferrite materials method, the nickel-zinc ferrite material is composed of main components and additives, and the main components are composed of the following molar percentage raw materials: Fe 2 o 3 48-49.6mol%, NiO 10-14mol%, ZnO 30-35mol%, the balance is CuO; based on the total mass of the main components, the additive is composed of the following raw materials: SiO 2 0.005~0.012wt%, CaCO 3 0.08~0.2wt%, V 2 o 5 0.05~0.35wt%, Bi 2 o 3 0.1-0.4wt%. The various components of the NiZn ferrite material of the present invention act synergistically, can be sintered below 1100°C, and the resistivity of the obtained material is 10 9 More than Ω·cm, it can play an insulating role; the obtained material has an initial magnetic permeability of 2000, and has good high-frequency impedance characteristics, especially suitable for making anti-EMI and common-mode design products; the preparation method and process conditions are easy to control, and the production The cost is low, there is no special requirement for equipment, and mass production can be realized.

Description

technical field [0001] The invention relates to the technical field of soft magnetic ferrite, in particular to an EMI suppression product, which can be widely used in high Bs and high impedance in the fields of communications, automobiles, office automation equipment, electronic data processing equipment, consumer electronic products, and household appliances. Nickel zinc ferrite material and preparation method thereof. Background technique [0002] Due to the characteristics of high magnetic permeability, high resistivity, and high frequency of use, nickel-zinc ferrite is widely used in computers, communications, and consumer electronics. At present, the main problems of NiZn-based ferrite materials in China are as follows: 1) The magnetic permeability of the material reaches more than 1500, the saturation magnetic induction Bs is about 250mT (room temperature), and the Curie temperature Tc is 100°C, which cannot meet the high current. and high-density installation (limite...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/64H01F1/34
CPCC04B35/2633C04B35/265C04B35/622C04B35/64C04B2235/3208C04B2235/3239C04B2235/3279C04B2235/3281C04B2235/3284C04B2235/3298C04B2235/3418C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/6583H01F1/344
Inventor 蒋玉梅朱晓丽陈军林
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD