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Power type nickel-zinc ferrite material and preparation method thereof

A nickel-zinc ferrite, power-type technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of high welding temperature, low material permeability, thermal shock resistance, weak mechanical strength, etc., to achieve The effect of strong operability and simple steps of the preparation method

Active Publication Date: 2017-04-26
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (2) If the saturation magnetic induction is increased, the magnetic permeability of the material will be low, which cannot meet the requirements of miniaturization of electronic equipment;
[0007] (3) Thermal shock resistance, mechanical strength, etc. are still weak, and the welding temperature is high. How to improve the thermal shock resistance of devices and the strength of ferrite has become a major technical problem

Method used

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  • Power type nickel-zinc ferrite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) The main material and auxiliary materials are weighed according to the proportion and mixed evenly to obtain the mixture. The specific proportion is shown in Table 1.

[0026] (2) The mixture is pre-fired in an oxidative atmosphere, the oxidative atmosphere is an air atmosphere, the pre-fire temperature is 800° C., and the holding time is 1 h.

[0027] (3) Grind the pre-fired mixture to the required particle size.

[0028] (4) Add an appropriate amount of binder to the sand-milled mixture for spray granulation and molding to obtain a green body.

[0029] (5) The green body is sintered and formed in an oxidative atmosphere to obtain a power type nickel-zinc ferrite material. The sintering temperature is 950° C. and the holding time is 2 hours.

Embodiment 2

[0031] (1) The main material and auxiliary materials are weighed according to the proportion and mixed evenly to obtain the mixture. The specific proportion is shown in Table 1.

[0032] (2) The mixture is pre-fired in an oxidative atmosphere, the oxidative atmosphere is an air atmosphere, the pre-fire temperature is 1050° C., and the holding time is 6 hours.

[0033] (3) Grind the pre-fired mixture to the required particle size.

[0034] (4) Add an appropriate amount of adhesive to the sand-milled mixed material to mechanically granulate and shape the material to obtain a green body.

[0035] (5) The green body is sintered in an oxidizing atmosphere to obtain a power type nickel-zinc ferrite material, the sintering temperature is 1200° C., and the holding time is 6 hours.

Embodiment 3

[0037] (1) The main material and auxiliary materials are weighed according to the proportion and mixed evenly to obtain the mixture. The specific proportion is shown in Table 1.

[0038] (2) The mixture is pre-fired in an oxidative atmosphere, the oxidative atmosphere is an air atmosphere, the pre-fire temperature is 1000° C., and the holding time is 2 hours.

[0039] (3) Grind the pre-fired mixture to the required particle size.

[0040] (4) Add an appropriate amount of adhesive to the sand-milled mixed material to mechanically granulate and shape the material to obtain a green body.

[0041] (5) The green body is sintered and formed in an oxidizing atmosphere to obtain a power-type nickel-zinc ferrite material. The sintering temperature is 1050° C. and the holding time is 3 hours.

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Abstract

The invention discloses a power type nickel-zinc ferrite material. The power type nickel-zinc ferrite material is prepared from a main material and an auxiliary material. The main material is prepared from, by molar percentage, 48-53 mol% of Fe2O3, 18-23 mol% of NiO, 20-25 mol% of ZnO and 6-8 mol% of CuO. The auxiliary material is selected from at least one of MnO, SiO2, Bi2O3, TiO2, V2O5, Co2O3, Cr2O3, MoO3, ZrO2, Nb2O5 and WO3. The power type nickel-zinc ferrite material has high magnetic conductivity, ultrahigh saturation flux density, ultralow power loss and high high-temperature-resisting soldering tin temperature, and the application range of the nickel-zinc ferrite material can be widened. The invention further provides a preparation method of the power type nickel-zinc ferrite material. The preparation method is simple in step, high in operability and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of soft magnetic ferrite, in particular to a power type nickel-zinc ferrite material and a preparation method thereof. Background technique [0002] Power ferrite is a material with high saturation magnetic induction and permeability, and low power consumption. In the case of high magnetic field strength and high frequency, the power loss can still be kept very low, and the power consumption will be maintained around a fixed value, and will not increase sharply with the increase of temperature, so that the magnetic core is in a virtuous cycle . [0003] Compared with MnZn power ferrite, NiZn ferrite has the characteristics of high resistivity and high frequency of use. It has a wide range of applications in many fields, such as industry, agriculture, military and civilian products, and can also be mass-produced, especially suitable for It can be made into various surface-mounted electromagnetic components ...

Claims

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Application Information

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IPC IPC(8): C04B35/30C04B35/622H01F1/34
CPCC04B35/265C04B35/622C04B2235/3232C04B2235/3239C04B2235/3241C04B2235/3244C04B2235/3251C04B2235/3256C04B2235/3258C04B2235/3262C04B2235/3275C04B2235/3281C04B2235/3298C04B2235/3418H01F1/344
Inventor 陈军林
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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