CN105976966A - Stabilized ferrite magnetic core material - Google Patents

Abstract

The invention discloses a stabilized ferrite magnetic core material. The stabilized ferrite magnetic core material is prepared from the following raw materials in parts by weight: 0.4-0.5 part of propylene glycol alginate, 2.5-3 parts of a silane coupling agent kh550, 3-3.4 parts of polyamide resin, 2-2.3 parts of sodium silicate, 1-1.5 parts of bentonite, 1.4-2 parts of silica sol, 0.4-0.5 part of ethylene glycol butyl ether, 0.3-0.4 part of a defoaming agent BYK022, 1-1.5 parts of polyformaldehyde, 2-2.5 parts of argil, 1.5-2 parts of polytetrafluoroethylene, 0.5-0.6 part of silicone emulsion, 1-2 parts of polyvinyl alcohol, 2.6-4 parts of barium oxide, 48-53 parts of iron trioxide, 31-35 parts of zinc oxide, 16-19 parts of manganese oxide, 9.6-12 parts of magnesium oxide, 1.6-2 parts of magnetic carbon powder, 1.4-2 parts of nanometer lanthanum oxide, and proper deionized water. The magnetic core material prepared by the invention has the advantages of being high in coercivity and magnetic conductivity, stabilized, low in cost and high in product quality controllability.

Description

A kind of stable ferrite core material

Technical field

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

Background technology

Along with developing rapidly of electronic information technology, metal magnetic powder core is widely used in the fields such as line filter, outputting inductance and Switching Power Supply, metal magnetic powder core be magnetic powder particles is mixed homogeneously with non magnetic dielectric after a compressing class soft magnetic materials, be broadly divided into ferrocart core, ferrum silica magnetic particle core, high magnetic flux powder core, Fe-Si-Al magnetic core, ferrum tantnickel powder core, ferrum nickel molybdenum powder core and amorphous nano-crystalline powder core.After being mixed with dielectric by ferromagnetic powder granule, carry out suppressing and a kind of soft-magnetic composite material of obtaining is referred to as metal magnetic powder core.Ferromagnetic powder granule after insulating wrapped at its Surface Creation one layer of dielectric insulating film, can effectively improve the resistivity of powder core, reduce eddy-current loss, therefore under metal magnetic powder core is applicable to higher frequency, metal magnetic powder core has become as the ingredient that soft magnetic materials is important, there is the advantages such as higher saturation induction density, good frequency characteristic and permanent magnetic conduction due to it, in modern science and technology field, powder core is widely used in the equipment such as telecommunications, radar, on and off switch as inductance filter, choking-winding.Along with communication technology and the digitized development of electronic product, soft magnetic ferrite and element are proposed new requirement, telecommunications industry needs FERRITE CORE to have low core loss and high magnetic permeability now, to meet the miniaturization of present electric equipment and high efficiency requirement, existing magnetic core is difficult to meet above-mentioned requirements, at present, continuous upgrading along with circuit, electronic component in circuit requires that electric current is higher, and after needing pcrmeability height, saturation flux density height, extra current bias field, pcrmeability declines little magnetics.Metallic magnet opposing ferrite magnet has higher saturation flux density, and metal material is taken as the material of main part of magnet as new use object.But miniaturization, the lightening development along with electronic product, it is desirable to electronic component miniaturization the most therewith, lightening.However as the miniaturization of magnet, in metal material often there is the problem that insulation impedance is low, mechanical strength is low in the material of high magnetic permeability.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of stable ferrite core material.

The present invention is achieved by the following technical solutions:

A kind of stable ferrite core material, it is made up of the raw material of following weight portion: alginic acid diol ester 0.4-0.5, silane coupler kh5502.5-3, polyamide 3-3.4, sodium silicate 2-2.3, bentonite 1-1.5, Ludox 1.4-2, butyl glycol ether 0.4-0.5, defoamer BYK0220.3-0.4, polyformaldehyde 1-1.5, potter's clay 2-2.5, politef 1.5-2, emulsified silicone oil 0.5-0.6, polyvinyl alcohol 1-2, Barium monoxide 2.6-4, iron sesquioxide 48-53, zinc oxide 31-35, manganese oxide 16-19, magnesium oxide 9.6-12, magnetic carbon powder 1.6-2, nano lanthanum oxide 1.4-2, deionized water is appropriate.

Described a kind of stable ferrite core material, is made up of step in detail below:

(1) iron sesquioxide, magnesium oxide, manganese oxide, zinc oxide and Barium monoxide are mixed, it is then added in ball mill wear into fine powder, silane coupler kh550 deionized water is diluted to the solution that solubility is 4-6%, add emulsified silicone oil, butyl glycol ether, defoamer BYK022 and alginic acid diol ester mix homogeneously, magnetic carbon powder and nano lanthanum oxide is added with 600-800 rev/min of lower dispersed with stirring 6-10min when being heated to 50-60 DEG C, standby after cooling；

(2) nanometer of above-mentioned preparation is mixed liquid to spray in fine powder, then fine powder is placed in baking oven at 110-120 DEG C baking 30-45min, at 230-250 DEG C, then dry 7-10min, be then cooled to room temperature；

(3) it is heated to melting by polyamide; add polyformaldehyde, potter's clay and Teflon stir uniform; in the product mixing and stirring prepared with step (2); it is added in comminutor make 100-200 mesh afterwards and accounts for 30Wt%; 200-300 mesh accounts for 40Wt%; 300-400 mesh accounts for 20Wt%, and more than 400 mesh accounting for the ratio of 10Wt%, to carry out particle diameter proportioning standby；

(4) sodium silicate is added the deionized water dilution of 10 times amount; add Ludox, polyvinyl alcohol stirs, and granule prepared by step (3) is added thereto evacuation and makes vacuum exceed-0.9 atmospheric pressure, keep 3 minutes; rear taking-up; dry, put into mould, be orientated in magnetic field and be pressed into base substrate under 1.5-2GPa; sinter at 1030-1200 DEG C under argon shield; insulation 2-2.5h, is tempered 1-1.5h at 730-750 DEG C, the most available.

nullThe invention have the advantage that metal magnetic mixed grinding is become fine powder by the present invention，Make to be uniformly dispersed between composition，Stable performance，And itself is had anticorrosive property、High temperature oxidation resistance and the lanthana of heat stability and magnetic carbon powder are coated in the mechanical property that core material is greatly improved、Shock resistance、High tenacity and adhesion strength，Insulation adhesive material is used to be coated on its surface again，Strengthen the bond strength between granule，And intercept intergranular eddy current，Reduce the eddy-current loss of core material，Good stability of the dimension when using different particle diameter proportionings to make sintering，Volume shrinkage is little，Dimensioning accuracy is high，Finally make further insulation processing，Insulating properties is improve in the case of not changing pcrmeability，Reduce core loss，The characteristics such as the materials processing performance of the present invention is good and resistance to compression bending strength is high，The core material of preparation has high-coercive force、The advantage that pcrmeability is big and stable，With low cost，Produce efficiently，Steady quality，Product quality controllability is high.

Detailed description of the invention

A kind of stable ferrite core material, is made up of the raw material of following weight portion (kilogram): alginic acid diol ester 0.4, silane coupler kh5502.5, polyamide 3, sodium silicate 2, bentonite 1, Ludox 1.4, butyl glycol ether 0.4, defoamer BYK0220.3, polyformaldehyde 1, potter's clay 2, politef 1.5, emulsified silicone oil 0.5, polyvinyl alcohol 1, Barium monoxide 2.6, iron sesquioxide 48, zinc oxide 31, manganese oxide 16, magnesium oxide 9.6, magnetic carbon powder 1.6, nano lanthanum oxide 1.4, deionized water are appropriate.

Described a kind of stable ferrite core material, is made up of step in detail below:

(1) iron sesquioxide, magnesium oxide, manganese oxide, zinc oxide and Barium monoxide are mixed, it is then added in ball mill wear into fine powder, silane coupler kh550 deionized water is diluted to the solution that solubility is 4%, add emulsified silicone oil, butyl glycol ether, defoamer BYK022 and alginic acid diol ester mix homogeneously, magnetic carbon powder and nano lanthanum oxide is added with 600 revs/min of lower dispersed with stirring 6min when being heated to 50 DEG C, standby after cooling；

(2) nanometer of above-mentioned preparation is mixed liquid to spray in fine powder, then fine powder is placed in baking oven at 110 DEG C baking 30min, at 230 DEG C, then dry 7min, be then cooled to room temperature；

(3) it is heated to melting by polyamide; add polyformaldehyde, potter's clay and Teflon stir uniform; in the product mixing and stirring prepared with step (2); it is added in comminutor make 100 mesh afterwards and accounts for 30Wt%; 200 mesh account for 40Wt%; 300 mesh account for 20Wt%, and more than 400 mesh accounting for the ratio of 10Wt%, to carry out particle diameter proportioning standby；

(4) sodium silicate is added the deionized water dilution of 10 times amount; add Ludox, polyvinyl alcohol stirs, and granule prepared by step (3) is added thereto evacuation and makes vacuum exceed an atmospheric pressure, keep 3 minutes; rear taking-up; dry, put into mould, be orientated in magnetic field and be pressed into base substrate under 1.5GPa; sinter at 1030 DEG C under argon shield; insulation 2h, is tempered 1h at 730 DEG C, the most available.

The soft magnetic ferrite prepared according to specific embodiment, carries out performance test to it, and result is as follows:

Tensile strength is 167N, and the intensity of magnetization is 264Am2/kg, maximum magnetic flux core loss (100Kc, 200mT): 321KW/m3, and saturation induction density is 1.0T, and coercivity is 7.8Oe, and Curie temperature is ＞ 240 DEG C.

Claims (2)

1. a stable ferrite core material, it is characterized in that, it is made up of the raw material of following weight portion: alginic acid diol ester 0.4-0.5, silane coupler kh5502.5-3, polyamide 3-3.4, sodium silicate 2-2.3, bentonite 1-1.5, Ludox 1.4-2, butyl glycol ether 0.4-0.5, defoamer BYK0220.3-0.4, polyformaldehyde 1-1.5, potter's clay 2-2.5, politef 1.5-2, emulsified silicone oil 0.5-0.6, polyvinyl alcohol 1-2, Barium monoxide 2.6-4, iron sesquioxide 48-53, zinc oxide 31-35, manganese oxide 16-19, magnesium oxide 9.6-12, magnetic carbon powder 1.6-2, nano lanthanum oxide 1.4-2, deionized water is appropriate.

A kind of stable ferrite core material, it is characterised in that be made up of step in detail below:

(1) iron sesquioxide, magnesium oxide, manganese oxide, zinc oxide and Barium monoxide are mixed, it is then added in ball mill wear into fine powder, silane coupler kh550 deionized water is diluted to the solution that solubility is 4-6%, add emulsified silicone oil, butyl glycol ether, defoamer BYK022 and alginic acid diol ester mix homogeneously, magnetic carbon powder and nano lanthanum oxide is added with 600-800 rev/min of lower dispersed with stirring 6-10min when being heated to 50-60 DEG C, standby after cooling；

(2) nanometer of above-mentioned preparation is mixed liquid to spray in fine powder, then fine powder is placed in baking oven at 110-120 DEG C baking 30-45min, at 230-250 DEG C, then dry 7-10min, be then cooled to room temperature；

(3) it is heated to melting by polyamide; add polyformaldehyde, potter's clay and Teflon stir uniform; in the product mixing and stirring prepared with step (2); it is added in comminutor make 100-200 mesh afterwards and accounts for 30Wt%; 200-300 mesh accounts for 40Wt%; 300-400 mesh accounts for 20Wt%, and more than 400 mesh accounting for the ratio of 10Wt%, to carry out particle diameter proportioning standby；

(4) sodium silicate is added the deionized water dilution of 10 times amount; add Ludox, polyvinyl alcohol stirs, and granule prepared by step (3) is added thereto evacuation and makes vacuum exceed-0.9 atmospheric pressure, keep 3 minutes; rear taking-up; dry, put into mould, be orientated in magnetic field and be pressed into base substrate under 1.5-2GPa; sinter at 1030-1200 DEG C under argon shield; insulation 2-2.5h, is tempered 1-1.5h at 730-750 DEG C, the most available.