CN106278230A - A kind of soft magnetic ferrite with capability of electromagnetic shielding - Google Patents

A kind of soft magnetic ferrite with capability of electromagnetic shielding Download PDF

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Publication number
CN106278230A
CN106278230A CN201610675641.6A CN201610675641A CN106278230A CN 106278230 A CN106278230 A CN 106278230A CN 201610675641 A CN201610675641 A CN 201610675641A CN 106278230 A CN106278230 A CN 106278230A
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soft magnetic
powder
electromagnetic shielding
capability
added
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李马林
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ANHUI DEXIN ELECTRIC Co Ltd
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ANHUI DEXIN ELECTRIC Co Ltd
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2691—Other ferrites containing alkaline metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40—Metallic constituents or additives not added as binding phase
    • C04B2235/405—Iron group metals

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  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Power Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

The invention discloses a kind of soft magnetic ferrite with capability of electromagnetic shielding, be made up of the raw material of following weight portion: hydroxy iron powder 60 65, iron sesquioxide 10 15, manganese oxide 25 27, zinc oxide 21 23, silane coupler kh5704 5, organic siliconresin 57, polyvinyl alcohol 12, sodium silicate 79, ferrocene powder 0.5 0.6, straw ashes 0.3 0.4, potassium permanganate 0.4 0.5, water are appropriate；Preparation method of the present invention is simple, and rational technology, with low cost, the core material of preparation has the performance of the aspects such as good electromagnetic shielding and heat shock resistance, and using effect is good, is hardly damaged the life-span long.

Description

A kind of soft magnetic ferrite with capability of electromagnetic shielding
Technical field
The present invention relates to Ferrite Material technical field, particularly relate to a kind of soft magnetic ferrite with capability of electromagnetic shielding Material.
Background technology
Soft magnetic materials is the magnetic material that a class has relatively low-coercivity and higher magnetic permcability, in the effect of externally-applied magnetic field Under, soft magnetic materials shows the feature being not only prone to magnetize but also be prone to demagnetization, and soft magnetic materials is as the important merit of magnetoelectricity conversion art One of energy material, has a wide range of applications in fields such as electronic equipment, communication and electrical equipment.Along with digital television, notebook electricity Brain universal, electronic equipment is to light, thin, miniaturization, and this necessity of making use of momentum reduces power volume, power supply is proposed higher, Tightened up requirement.Compound soft magnetic material is owing to having metal soft magnetic material high saturated magnetic induction and soft magnetic ferrite height electricity The feature of resistance rate, the application in industrial technology and daily life is increasing, is subject to people's attention all the time and obtains Study widely.Compound soft magnetic material is usually with soft magnetic metal powder as raw material, carries out organic or inorganic at particle surface exhausted After edge processes, using powder metallurgical technique by compressing for composite powder i.e. available block soft magnetic materials.With traditional gold Belonging to soft magnetic materials to compare, compound soft magnetic material has higher resistivity, it is possible to reduce eddy-current loss, improves the use frequency of material Rate.But general organic or inorganic clad has non magnetic feature, after being combined with metallic magnetic grain, the most also The saturation magnetization of material can be reduced, so resistivity of material and reduction have to improved by the most effectively technique While magnetic loss, keeping higher density and saturation magnetization is the current emphasis studied.
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 soft magnet with capability of electromagnetic shielding Ferrite.
The present invention is achieved by the following technical solutions:
A kind of soft magnetic ferrite with capability of electromagnetic shielding, is made up of the raw material of following weight portion: hydroxy iron powder 60-65, iron sesquioxide 10-15, manganese oxide 25-27, zinc oxide 21-23, silane coupler kh5704-5, organic siliconresin 5- 7, polyvinyl alcohol 1-2, sodium silicate 7-9, ferrocene powder 0.5-0.6, straw ashes 0.3-0.4, potassium permanganate 0.4-0.5, water are fitted Amount；
Described a kind of soft magnetic ferrite with capability of electromagnetic shielding, is made up of step in detail below:
(1) by hydroxy iron powder, iron sesquioxide, manganese oxide, zinc oxide and silane coupler kh570 mixing and ball milling 0.5-1h, so After by the organic siliconresin acetone solution of 4-6 times amount, more above-mentioned coupling magnetic powder is added in organic silicon solution stir 0.6-1h, Then it is dried after 1-2h pulverizes standby in 40-50 ° of C；
(2) remaining remaining material is mixed in addition to polyvinyl alcohol and sodium silicate, after grinding distribution is uniform under 120-200 ° of C Vacuum annealing 20-40min, pulverizes standby after annealing；
(3) be dissolved in water the poly-vinyl alcohol solution making concentration at 8-10% by polyvinyl alcohol, then material step (2) obtained Being added in poly-vinyl alcohol solution, ultrasonic disperse uniformly becomes slip；
(4) product that step (1) obtains is added in step (3), is added to spray drying tower internal spraying after mixing and stirring and makes Grain, controls inlet temperature at 300-340 ° of C, and outlet temperature controls at 100-110 ° of C, and then granule is crossed 60 mesh sieves, uses Full-automatic powder moulding machine cold moudling；
(5) blank made is impregnated in sodium silicate solution, evacuation, takes out material after keeping 3min, dry, then at nitrogen Under gas shielded, under 1000-1200 ° of C, sinter 120-160min, after terminating, be cooled to room temperature.
The invention have the advantage that the present invention use iron powder replace ferrum oxide prepare core material have relatively low coercivity and After loss characteristic, and other powder body couplings and at one layer of organic siliconresin of Surface coating, increase density, decrease core material Volume and there is higher resistivity, high saturated magnetic induction and pcrmeability, it is possible to reduce eddy-current loss and improve material The function of the use frequency of material, the present invention improves the caking property strengthened between granule, reduces briquetting pressure, it is to avoid when compacting Blank aliquation, the fried quality problems such as stricture of vagina, cracking, after formation in dipping sodium silicate, greatly reduce compressing residual pores Gap and the problem of stress, and improve fire-resistant and heat-resisting performance, the ferrocene powder of interpolation, straw ashes and potassium permanganate are mixed Close and use impedance operator and the magnetic conductivity greatly improving soft magnetic ferrite, there is good electromagnetic wave shielding, this Bright preparation method is simple, and rational technology, with low cost, the core material of preparation has good electromagnetic shielding and heat shock resistance etc. The performance of aspect, using effect is good, is hardly damaged the life-span long.
Detailed description of the invention
A kind of soft magnetic ferrite with capability of electromagnetic shielding, is made up of the raw material of following weight portion: hydroxyl Iron powder 60, iron sesquioxide 10, manganese oxide 25, zinc oxide 21, silane coupler kh5704, organic siliconresin 5, polyvinyl alcohol 1, Sodium silicate 7, ferrocene powder 0.5, straw ashes 0.3, potassium permanganate 0.4, water are appropriate；
Described a kind of soft magnetic ferrite with capability of electromagnetic shielding, is made up of step in detail below:
(1) by hydroxy iron powder, iron sesquioxide, manganese oxide, zinc oxide and silane coupler kh570 mixing and ball milling 0.5h, then By the organic siliconresin acetone solution of 4 times amount, then it is added to above-mentioned coupling magnetic powder in organic silicon solution stir 0.6h, then exists 40 ° of C are dried after 1h pulverizes standby；
(2) remaining remaining material is mixed in addition to polyvinyl alcohol and sodium silicate, grinding distribution uniformly after under 120 ° of C vacuum Annealing 20min, pulverizes standby after annealing；
(3) polyvinyl alcohol is dissolved in water makes the poly-vinyl alcohol solution that concentration is 8%, then the material that step (2) obtains is added to In poly-vinyl alcohol solution, ultrasonic disperse uniformly becomes slip；
(4) product that step (1) obtains is added in step (3), is added to spray drying tower internal spraying after mixing and stirring and makes Grain, controls at 300 ° of C by inlet temperature, and outlet temperature controls at 100 ° of C, then granule is crossed 60 mesh sieves, uses full-automatic powder End forming machine cold moudling；
(5) blank made is impregnated in sodium silicate solution, evacuation, takes out material after keeping 3min, dry, then at nitrogen Under gas shielded, under 1000 ° of C, sinter 120min, after terminating, be cooled to room temperature.
The soft magnetic ferrite prepared according to specific embodiment, carries out performance test to it, and result is as follows:
Saturation flux density (T): 0.89, magnetic loss (W/Kg): 65, coercivity (A/m): 20, Curie temperature (° C): 168, work Frequency (MHz): 0.16.

Claims (2)

1. a soft magnetic ferrite with capability of electromagnetic shielding, it is characterised in that prepared by the raw material of following weight portion Make: hydroxy iron powder 60-65, iron sesquioxide 10-15, manganese oxide 25-27, zinc oxide 21-23, silane coupler kh5704- 5, organic siliconresin 5-7, polyvinyl alcohol 1-2, sodium silicate 7-9, ferrocene powder 0.5-0.6, straw ashes 0.3-0.4, permanganic acid Potassium 0.4-0.5, water are appropriate.
A kind of soft magnetic ferrite with capability of electromagnetic shielding, it is characterised in that by following Concrete steps are made:
(1) by hydroxy iron powder, iron sesquioxide, manganese oxide, zinc oxide and silane coupler kh570 mixing and ball milling 0.5-1h, so After by the organic siliconresin acetone solution of 4-6 times amount, more above-mentioned coupling magnetic powder is added in organic silicon solution stir 0.6-1h, Then it is dried after 1-2h pulverizes standby in 40-50 ° of C；
(2) remaining remaining material is mixed in addition to polyvinyl alcohol and sodium silicate, after grinding distribution is uniform under 120-200 ° of C Vacuum annealing 20-40min, pulverizes standby after annealing；
(3) be dissolved in water the poly-vinyl alcohol solution making concentration at 8-10% by polyvinyl alcohol, then material step (2) obtained Being added in poly-vinyl alcohol solution, ultrasonic disperse uniformly becomes slip；
(4) product that step (1) obtains is added in step (3), is added to spray drying tower internal spraying after mixing and stirring and makes Grain, controls inlet temperature at 300-340 ° of C, and outlet temperature controls at 100-110 ° of C, and then granule is crossed 60 mesh sieves, uses Full-automatic powder moulding machine cold moudling；
(5) blank made is impregnated in sodium silicate solution, evacuation, takes out material after keeping 3min, dry, then at nitrogen Under gas shielded, under 1000-1200 ° of C, sinter 120-160min, after terminating, be cooled to room temperature.
CN201610675641.6A 2016-08-17 2016-08-17 A kind of soft magnetic ferrite with capability of electromagnetic shielding Pending CN106278230A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107785142A (en) * 2017-10-31 2018-03-09 苏州南尔材料科技有限公司 A kind of preparation method of the iron nickel soft magnetic materials with high antiseptic power
CN110491614A (en) * 2019-08-21 2019-11-22 南通成泰磁材科技有限公司 Magnetic material of high compressive strength and preparation method thereof
CN114713817A (en) * 2022-02-17 2022-07-08 苏州创浩新材料科技有限公司 Electromagnetic shielding iron-based composite material and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102992750A (en) * 2012-11-23 2013-03-27 天长市昭田磁电科技有限公司 Preparation method of high-performance manganese-zinc MnZn soft magnetic ferrite material
CN105070454A (en) * 2015-08-21 2015-11-18 天长市昭田磁电科技有限公司 Ferrite core material with high mechanical strength

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102992750A (en) * 2012-11-23 2013-03-27 天长市昭田磁电科技有限公司 Preparation method of high-performance manganese-zinc MnZn soft magnetic ferrite material
CN105070454A (en) * 2015-08-21 2015-11-18 天长市昭田磁电科技有限公司 Ferrite core material with high mechanical strength

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107785142A (en) * 2017-10-31 2018-03-09 苏州南尔材料科技有限公司 A kind of preparation method of the iron nickel soft magnetic materials with high antiseptic power
CN110491614A (en) * 2019-08-21 2019-11-22 南通成泰磁材科技有限公司 Magnetic material of high compressive strength and preparation method thereof
CN114713817A (en) * 2022-02-17 2022-07-08 苏州创浩新材料科技有限公司 Electromagnetic shielding iron-based composite material and preparation method thereof

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Application publication date: 20170104