CN105060874A - Manganese zinc ferrite material for increasing electrical resistivity - Google Patents
Manganese zinc ferrite material for increasing electrical resistivity Download PDFInfo
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Abstract
The invention discloses a manganese zinc ferrite material for increasing electrical resistivity. The material is prepared from the raw materials in parts by weight: 60-65 parts of hydroxy iron powder, 10-15 parts of iron sesquioxide, 25-27 parts of manganese oxide, 21-23 parts of zinc oxide, 4-5 parts of a silane coupling agent kh570, 5-7 parts of organic silicon resin, 1-2 parts of polyvinyl alcohol, 7-9 parts of sodium silicate, 0.4-0.5 part of calcium oxide, 0.3-0.4 part of molybdenum powder, 0.5-0.6 part of aluminum triphosphate and a proper amount of water. The material disclosed by the invention is simple in preparation method, and the product is good in stability, good in operability, high in initial permeability, high in electrical resistivity, less in loss and wide in using range, and can be produced on a large scale.
Description
Technical field
The present invention relates to Ferrite Material technical field, particularly relate to a kind of MnZn ferrite material increasing resistivity.
Background technology
Soft magnetic materials is the magneticsubstance that a class has compared with low-coercivity and higher magnetic permcability, under the effect of externally-applied magnetic field, soft magnetic materials shows the feature being not only easy to magnetize but also be easy to demagnetize, soft magnetic materials, as one of the critical function material of magnetoelectricity conversion art, has a wide range of applications in fields such as electronics, communication and electrical equipment.Along with digital television, notebook computer universal, electronics 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, at employing powder metallurgical technique, composite powder compression moulding can be obtained block soft magnetic materials.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 MnZn ferrite material increasing resistivity.
The present invention is achieved by the following technical solutions:
Increase a MnZn ferrite material for resistivity, be made up of the raw material of following weight part: carbonyl iron particles 60-65, ferric oxide 10-15, manganese oxide 25-27, zinc oxide 21-23, silane coupling agent kh5704-5, silicone resin 5-7, polyvinyl alcohol 1-2, water glass 7-9, calcium oxide 0.4-0.5, molybdenum powder 0.3-0.4, aluminium triphosphate 0.5-0.6, water are appropriate;
Described a kind of MnZn ferrite material increasing resistivity, be made up of following concrete steps:
(1) by carbonyl iron particles, ferric oxide, manganese oxide, zinc oxide and silane coupling agent kh570 mixing and ball milling 0.5-1h, then by the acetone solution of silicone resin 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 water glass, grinding distribution evenly after under 120-200 ° of C vacuum annealing 20-40min, pulverize for subsequent use after anneal;
(3) be dissolved in water by polyvinyl alcohol and make the polyvinyl alcohol solution of concentration at 8-10%, then be added in polyvinyl 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, temperature out controls at 100-110 ° of C, then particle is crossed 60 mesh sieves, adopt full-automatic powder moulding machine coldmoulding;
(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 ferric oxide to prepare core material and have lower coercive force and loss characteristic, with after other powder couplings and at Surface coating one deck silicone resin, 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 cohesiveness between enhanced granule, reduce forming pressure, avoid the blank aliquation when suppressing, fried line, the quality problems such as cracking, flood after formation in water glass, reduce the problem of compression moulding residual porosity and stress greatly, and improve fire-resistant and heat-resisting performance, the calcium oxide added, molybdenum powder and aluminium triphosphate can play crystal grain thinning and improve density of material, and initial permeability and resistivity can be improved, the effect reduced the wastage, preparation method of the present invention is simple, product stability is good, good operability, product initial permeability is high, resistivity is high, loss is little, use range is wide, can be mass-produced.
Embodiment
Increase a MnZn ferrite material for resistivity, be made up of the raw material of following weight part: carbonyl iron particles 60, ferric oxide 10, manganese oxide 25, zinc oxide 21, silane coupling agent kh5704, silicone resin 5, polyvinyl alcohol 1, water glass 7, calcium oxide 0.4, molybdenum powder 0.3, aluminium triphosphate 0.5, water are appropriate;
Described a kind of MnZn ferrite material increasing resistivity, be made up of following concrete steps:
(1) by carbonyl iron particles, ferric oxide, manganese oxide, zinc oxide and silane coupling agent kh570 mixing and ball milling 0.5h, then by the acetone solution of silicone resin 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 water glass, grinding distribution evenly after under 120 ° of C vacuum annealing 20min, pulverize for subsequent use after anneal;
(3) be dissolved in water by polyvinyl alcohol and make concentration at the polyvinyl alcohol solution of 8%, then be added in polyvinyl 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, temperature out controls at 100 ° of C, then particle is crossed 60 mesh sieves, adopt full-automatic powder moulding machine coldmoulding;
(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 magnetic flux density (T): 0.92, magnetic loss (W/Kg): 68, coercive force (A/m): 18, Curie temperature (° C): 170, operating frequency (MHz): 0.12.
Claims (2)
1. one kind increases the MnZn ferrite material of resistivity, it is characterized in that, be made up of the raw material of following weight part: carbonyl iron particles 60-65, ferric oxide 10-15, manganese oxide 25-27, zinc oxide 21-23, silane coupling agent kh5704-5, silicone resin 5-7, polyvinyl alcohol 1-2, water glass 7-9, calcium oxide 0.4-0.5, molybdenum powder 0.3-0.4, aluminium triphosphate 0.5-0.6, water are appropriate.
2. a kind of MnZn ferrite material increasing resistivity according to claim 1, is characterized in that, be made up of following concrete steps:
(1) by carbonyl iron particles, ferric oxide, manganese oxide, zinc oxide and silane coupling agent kh570 mixing and ball milling 0.5-1h, then by the acetone solution of silicone resin 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 water glass, grinding distribution evenly after under 120-200 ° of C vacuum annealing 20-40min, pulverize for subsequent use after anneal;
(3) be dissolved in water by polyvinyl alcohol and make the polyvinyl alcohol solution of concentration at 8-10%, then be added in polyvinyl 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, temperature out controls at 100-110 ° of C, then particle is crossed 60 mesh sieves, adopt full-automatic powder moulding machine coldmoulding;
(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.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169349A (en) * | 2016-08-17 | 2016-11-30 | 安徽德信电气有限公司 | A kind of stable ferrite core material |
| CN106205941A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of heat shock resistance core material |
| CN106205938A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of nano magnetic core material |
| CN106205937A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of Efficient soft magnetic ferrite core material |
| CN106205939A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of flexible magnetic ferrite magnetic core material |
| CN106252014A (en) * | 2016-08-17 | 2016-12-21 | 安徽德信电气有限公司 | A kind of jamproof ferrite core material |
| CN106252015A (en) * | 2016-08-17 | 2016-12-21 | 安徽德信电气有限公司 | A kind of various coil ferrite core material |
| CN106298142A (en) * | 2016-08-17 | 2017-01-04 | 安徽德信电气有限公司 | The core material that a kind of Curie temperature is high |
| CN106396658A (en) * | 2016-09-05 | 2017-02-15 | 中南大学 | Method for preparing spinel type ferrite material precursor by solid phase reaction |
| CN109694245A (en) * | 2018-12-04 | 2019-04-30 | 天长市昭田磁电科技有限公司 | A kind of high resistivity magnetic ferrite magnetic core and its processing method |
| CN112094114A (en) * | 2020-09-25 | 2020-12-18 | 麦格磁电科技（珠海）有限公司 | Manganese-zinc ferrite composite material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169349A (en) * | 2016-08-17 | 2016-11-30 | 安徽德信电气有限公司 | A kind of stable ferrite core material |
| CN106205941A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of heat shock resistance core material |
| CN106205938A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of nano magnetic core material |
| CN106205937A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of Efficient soft magnetic ferrite core material |
| CN106205939A (en) * | 2016-08-17 | 2016-12-07 | 安徽德信电气有限公司 | A kind of flexible magnetic ferrite magnetic core material |
| CN106252014A (en) * | 2016-08-17 | 2016-12-21 | 安徽德信电气有限公司 | A kind of jamproof ferrite core material |
| CN106252015A (en) * | 2016-08-17 | 2016-12-21 | 安徽德信电气有限公司 | A kind of various coil ferrite core material |
| CN106298142A (en) * | 2016-08-17 | 2017-01-04 | 安徽德信电气有限公司 | The core material that a kind of Curie temperature is high |
| CN106396658A (en) * | 2016-09-05 | 2017-02-15 | 中南大学 | Method for preparing spinel type ferrite material precursor by solid phase reaction |
| CN106396658B (en) * | 2016-09-05 | 2019-10-15 | 中南大学 | A kind of method that solid phase reaction prepares spinel type ferrite material precursor |
| CN109694245A (en) * | 2018-12-04 | 2019-04-30 | 天长市昭田磁电科技有限公司 | A kind of high resistivity magnetic ferrite magnetic core and its processing method |
| CN112094114A (en) * | 2020-09-25 | 2020-12-18 | 麦格磁电科技（珠海）有限公司 | Manganese-zinc ferrite composite material and preparation method thereof |
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