CN105070453A - High-superposition magnetic core material - Google Patents

Abstract

The invention discloses a high-superposition magnetic core material. The high-superposition magnetic core material is prepared from, by weight, 60-65 parts of hydroxyl iron powder, 10-15 parts of iron sesquioxide, 25-27 parts of manganese oxide, 21-23 parts of zinc oxide, 4-5 parts of silane coupling agent kh570, 5-7 parts of organic silicon resin, 1-2 parts of polyving akohol, 7-9 parts of sodium silicate, 0.4-0.5 part of neodymium oxide, 1-1.3 parts of glass powder, 0.4-0.7 part of lithium chloride and a proper amount of water. The prepared magnetic core material has the functions of very good superposition performance, high stability, the low loss and other aspects, the preparing technology is simple, material sources are wide, cost is low, and good applicability is achieved.

Description

A kind of high superposition core material

Technical field

The present invention relates to Ferrite Material technical field, particularly relate to a kind of high superposition core material.

Background technology

Soft magnetic material is the magnetic material that a class has compared with low-coercivity and higher magnetic permcability, under the effect of externally-applied magnetic field, soft magnetic material shows the feature being not only easy to magnetize but also be easy to demagnetize, soft magnetic material, as one of the critical function material of magnetoelectricity conversion art, has a wide range of applications in fields such as electronic equipment, communication and electrical equipment.Along with digital television, notebook computer universal, electronic equipment is to light, thin, miniaturization, and this necessity of making use of momentum reduces power volume, proposes higher, stricter requirement to power supply.Compound soft magnetic material is owing to having metal soft magnetic material high saturated magnetic induction and soft magnetic ferrite high resistivity, and the application in industrial technology and daily life is increasing, is subject to people's attention all the time and is studied widely.Compound soft magnetic material is generally with soft magnetic metal powder for raw material, after particle surface carries out organic or inorganic insulation processing, can obtain block soft magnetic material at employing powder metallurgical technique by compressing for composite powder.Compared with traditional metal soft magnetic material, compound soft magnetic material has higher resistivity, can reduce eddy current loss, improves the frequency of utilization of material.But general organic or inorganic coating layer has non magnetic feature, after metallic magnetic grain compound, also the saturation magnetization of material can be reduced to a certain extent, so must by suitable effective technique, at raising resistivity of material with while reducing magnetic loss, maintenance higher density and saturation magnetization are the emphasis of current research.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of high superposition core material.

The present invention is achieved by the following technical solutions:

A kind of high superposition core material, is made up of the raw material of following weight portion: carbonyl iron particles 60-65, di-iron trioxide 10-15, manganese oxide 25-27, zinc oxide 21-23, silane coupler kh5704-5, organic siliconresin 5-7, polyvinyl alcohol 1-2, sodium metasilicate 7-9, neodymia 0.4-0.5, glass dust 1-1.3, lithium chloride 0.4-0.7, water are appropriate;

Described a kind of high superposition core material, be made up of following concrete steps:

(1) by carbonyl iron particles, di-iron trioxide, manganese oxide, zinc oxide and silane coupler kh570 mixing and ball milling 0.5-1h, then by the acetone solution of organic siliconresin by 4-6 times amount, be added in organic silicon solution by above-mentioned coupling magnetic and stir 0.6-1h, then in 40-50 ° of C, dry 1-2h is for subsequent use after pulverizing;

(2) all the other remaining materials are mixed except polyvinyl alcohol and sodium metasilicate, grinding distribution evenly after under 120-200 ° of C vacuum annealing 20-40min, pulverize for subsequent use after annealing in process;

(3) be dissolved in water by polyvinyl alcohol and make the poly-vinyl alcohol solution of concentration at 8-10%, then be added in poly-vinyl alcohol solution by the material that step (2) obtains, ultrasonic disperse evenly becomes slip;

(4) product that step (1) obtains is added in step (3), the granulation of spray drying tower internal spraying is added to after mixing and stirring, inlet temperature is controlled at 300-340 ° of C, outlet temperature controls at 100-110 ° of C, then particle is crossed 60 mesh sieves, adopt full-automatic powder moulding machine cold moudling;

(5) blank made is impregnated in sodium silicate solution, vacuumizes, after keeping 3min, take out material, dry, then under nitrogen protection, under 1000-1200 ° of C, sinter 120-160min, after terminating, be cooled to room temperature.

Advantage of the present invention is: the present invention adopts iron powder to replace iron oxide to prepare core material and have lower coercive force and loss characteristic, with after other powder couplings and at Surface coating one deck organic siliconresin, increase density, decrease the volume of core material and there is higher resistivity, high saturated magnetic induction and magnetic permeability, the function of the frequency of utilization of eddy current loss and raising material can be reduced, invention increases the caking property strengthened between particle, reduce briquetting pressure, avoid the blank aliquation when suppressing, fried line, the quality problems such as cracking, flood after formation in sodium metasilicate, reduce the problem of compressing residual porosity and stress greatly, and improve fire-resistant and heat-resisting performance, the neodymia added, glass dust and lithium chloride cooperatively interact the effect played and help and melt, reduce sintering temperature, cost-saving, core material prepared by the present invention has good additivity, the function of the aspect such as high stability and low-loss, preparation technology is simple, material source is extensive, cost is low, there is good application.

Embodiment

A kind of high superposition core material, is made up of the raw material of following weight portion: carbonyl iron particles 60, di-iron trioxide 10, manganese oxide 25, zinc oxide 21, silane coupler kh5704, organic siliconresin 5, polyvinyl alcohol 1, sodium metasilicate 7, neodymia 0.4, glass dust 1, lithium chloride 0.4, water are appropriate;

Described a kind of high superposition core material, be made up of following concrete steps:

(1) by carbonyl iron particles, di-iron trioxide, manganese oxide, zinc oxide and silane coupler kh570 mixing and ball milling 0.5h, then by the acetone solution of organic siliconresin by 4 times amount, be added in organic silicon solution by above-mentioned coupling magnetic and stir 0.6h, then in 40 ° of C, dry 1h is for subsequent use after pulverizing;

(2) all the other remaining materials are mixed except polyvinyl alcohol and sodium metasilicate, grinding distribution evenly after under 120 ° of C vacuum annealing 20min, pulverize for subsequent use after annealing in process;

(3) be dissolved in water by polyvinyl alcohol and make concentration at the poly-vinyl alcohol solution of 8%, then be added in poly-vinyl alcohol solution by the material that step (2) obtains, ultrasonic disperse evenly becomes slip;

(4) product that step (1) obtains is added in step (3), be added to the granulation of spray drying tower internal spraying after mixing and stirring, inlet temperature controlled at 300 ° of C, outlet temperature controls at 100 ° of C, then particle is crossed 60 mesh sieves, adopt full-automatic powder moulding machine cold moudling;

(5) blank made is impregnated in sodium silicate solution, vacuumizes, after keeping 3min, take out material, dry, then under nitrogen protection, under 1000 ° of C, sinter 120min, after terminating, be cooled to room temperature.

According to soft magnetic ferrite prepared by specific embodiment, carry out performance test to it, result is as follows:

Saturation flux density (T): 0.87, magnetic loss (W/Kg): 61, coercive force (A/m): 18, Curie temperature (° C): 160, operating frequency (MHz): 0.21.

Claims (2)

1. one kind high superposition core material, it is characterized in that, be made up of the raw material of following weight portion: carbonyl iron particles 60-65, di-iron trioxide 10-15, manganese oxide 25-27, zinc oxide 21-23, silane coupler kh5704-5, organic siliconresin 5-7, polyvinyl alcohol 1-2, sodium metasilicate 7-9, neodymia 0.4-0.5, glass dust 1-1.3, lithium chloride 0.4-0.7, water are appropriate.

2. a kind of height superposes core material according to claim 1, it is characterized in that, is made up of following concrete steps:

(1) by carbonyl iron particles, di-iron trioxide, manganese oxide, zinc oxide and silane coupler kh570 mixing and ball milling 0.5-1h, then by the acetone solution of organic siliconresin by 4-6 times amount, be added in organic silicon solution by above-mentioned coupling magnetic and stir 0.6-1h, then in 40-50 ° of C, dry 1-2h is for subsequent use after pulverizing;

(2) all the other remaining materials are mixed except polyvinyl alcohol and sodium metasilicate, grinding distribution evenly after under 120-200 ° of C vacuum annealing 20-40min, pulverize for subsequent use after annealing in process;

(3) be dissolved in water by polyvinyl alcohol and make the poly-vinyl alcohol solution of concentration at 8-10%, then be added in poly-vinyl alcohol solution by the material that step (2) obtains, ultrasonic disperse evenly becomes slip;

(4) product that step (1) obtains is added in step (3), the granulation of spray drying tower internal spraying is added to after mixing and stirring, inlet temperature is controlled at 300-340 ° of C, outlet temperature controls at 100-110 ° of C, then particle is crossed 60 mesh sieves, adopt full-automatic powder moulding machine cold moudling;

(5) blank made is impregnated in sodium silicate solution, vacuumizes, after keeping 3min, take out material, dry, then under nitrogen protection, under 1000-1200 ° of C, sinter 120-160min, after terminating, be cooled to room temperature.