CN100519470C - Ferrite containing magnesium, zinc and copper element and its production method - Google Patents
Ferrite containing magnesium, zinc and copper element and its production method Download PDFInfo
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- CN100519470C CN100519470C CNB2005100769039A CN200510076903A CN100519470C CN 100519470 C CN100519470 C CN 100519470C CN B2005100769039 A CNB2005100769039 A CN B2005100769039A CN 200510076903 A CN200510076903 A CN 200510076903A CN 100519470 C CN100519470 C CN 100519470C
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Abstract
The invention relates the low cost and high property anti-interference soft magnetic ferrite material. The material is used in connecting wire to anti-electromagnetic interference, and the material has the characters of high impedance, low high-density metal content and withstanding high voltage. The material uses MgO, CuO, ZnO, Fe2O3 as main composition, is added Mn to modify, and adopts primary spraying at the 1100Deg.C-1200Deg.C.
Description
Technical field
The present invention relates to a kind of anti-electromagnetic interference that contains magnesium, zinc, copper with ferrite and preparation method thereof, especially a kind of ferrite that once shaped agglomerating method is prepared from and preparation method thereof that adopts.
Background technology
Existing anti-electromagnetic interference soft magnetic materials is mainly based on MnZn, nickel-zinc ferrite, but the cost of these two kinds of materials is all higher, and heavy metal content is also higher, does not meet environmental protection requirement.And substantially all take " red spray, black spray " twice spraying and " pre-burning, double sintering " twice agglomerating production method in these two kinds of ferrite production processes, therefore at present the comparatively complicated manufacturing cost of technology improves greatly, does not still have a kind of not only cheap but also has the Ferrite Material that good interference free performance can replace or partly replace MnZn, nickel zinc.Therefore the technician replaces nickel with the cheaper magnesium of price, makes magnesium, zinc, cu ferrite, overcomes to add weak magnetic magnesium elements and reduce performance defect, develops the anti-electromagnetic interference soft magnetic materials of high-performance and low-cost.
Summary of the invention
It is poor to the objective of the invention is at the low-cost ferrite interference free performance that exists in the prior art, the high deficiency of production cost, provide a kind of adopt lower cost materials to make and adopt once to spray once sintered production method produces novel can anti-electromagnetic interference contain magnesium, zinc, copper Ferrite Material and preparation method thereof.
Technical scheme of the present invention is: a kind of ferrite that contains magnesium, zinc, copper, with magnesium oxide 5.5～7mol%, cupric oxide 6～9mol%, zinc oxide 24.5～29mol%, ferric oxide 47～49.5% is a principal constituent, has added the trimanganese tetroxide of 0.2～0.5wt% of modifying function in addition.
A kind of magnesium that contains, zinc, the ferritic preparation method of copper, comprise wet ball grinding one time, the secondary sand milling, spray shaping, sintering, steps such as cleaning, interpolation concentration is 8% PVA solution during sand milling, adopt and once grind the atomizing granulating technology spray shaping, adopt the mode of gradient increased temperature in 120 minutes, to rise to 300 ℃-350 ℃ during sintering by room temperature, keep 300 ℃-350 ℃ to continue heating 120 minutes, then in 120 minutes, rise to 650 ℃ by 300 ℃-350 ℃, in 90 minutes, rise to 950 ℃ again by 650 ℃, afterwards, in 90 minutes, rise to 1100 ℃-1200 ℃ by 950 ℃, keep 1100 ℃-1200 ℃ to continue heating 180 minutes, cool to room temperature naturally at last and get final product.
4-4.5 hour ball milling time, ball: material: water: dispersion agent=2:1:0.5:0.3; Circulation sand milling 6-6.5 hour, the adding massfraction is 13% PVA solution, stirs 30 minutes behind the sand milling.
Sand milling slurry mean particle size is 1.0-3.0 μ m.
Get the particle between 40 orders-120 order behind the mist projection granulating, press 2.8g/cm
3Green density compression moulding.
Beneficial effect of the present invention is: the material prescription that adopts the lower CuO content of higher ZnO content.Because weak magnetic Mg
2+, in spinel phase ferrite character, both can occupy the A position and also can occupy the B position, the segregation that higher ZnO content can suppress MgO reduces the generation of magnesium wustite, and becomes single spinel phase ferrite, has higher magnetic property.Lower CuO content makes Cu mainly be distributed in crystal boundary, improves resistivity
By mixing the suitable element modification.Has certain density Mn
3+Occur magnetostriction among the Mg of element, Cu, the Zn and reduce, improve limiting frequency, make, simultaneously because Mn in the wider frequency intrinsic impedance
3+, suppressed electrons spread, improve resistivity
, the material high pressure of anti-3600V is not punctured, can be directly used in the high-pressure section in the circuit, and apply unlike the MnZn material require.
Description of drawings
Fig. 1 is the sintering curre synoptic diagram of the specific embodiment of the invention
Embodiment
Referring to sintering temperature curve shown in Figure 1 of the present invention, specific embodiment one adds: Fe
2O
31266.2Kg, ZnO339.0Kg, MgO 118.5Kg, CuO 76.4Kg, Mn
3O
47.2Kg ball milling is 4 hours then, ball: material: water: dispersion agent=2:1:0.5:0.3%.Circulation sand milling 6 hours adds concentration and is 8%, massfraction is 13% PVA solution, stirs 30 minutes, and a mist projection granulating is got the particle between 40 orders-120 order, and particle is pressed 2.8g/cm
3Sintering is prepared in green density compression moulding.Adopt the mode of gradient increased temperature in 120 minutes, to rise to 350 ℃ during sintering by room temperature, keep 350 ℃ to continue heating 120 minutes, then in 120 minutes, rise to 650 ℃ by 350 ℃, in 90 minutes, rise to 950 ℃ again by 650 ℃, afterwards, in 90 minutes, rise to 1120 ℃ by 950 ℃, keep 1120 ℃ to continue heating 180 minutes, naturally cool to room temperature subsequently, cross decorations ray machine, ultrasonic cleaning and sorted and packaged at last.
Specific embodiment two adds Fe
2O
31248.7Kg, ZnO 347.8Kg, MgO 118.1Kg, CuO 82.5Kg, Mn
3O
45.4Kg.Ball milling 4 hours, ball: material: water: dispersion agent=2:1:0.5:0.3%.Circulation sand milling 6 hours adds concentration and is 8%, massfraction is 13% PVA solution, stirs 30 minutes, and a mist projection granulating is got the particle between 40 orders-120 order, and particle is pressed 2.8g/cm
3Sintering is prepared in green density compression moulding.Adopt the mode of gradient increased temperature in 120 minutes, to rise to 350 ℃ during sintering by room temperature, keep 350 ℃ to continue heating 120 minutes, then in 120 minutes, rise to 650 ℃ by 350 ℃, in 90 minutes, rise to 950 ℃ again by 650 ℃, afterwards, in 90 minutes, rise to 1150 ℃ by 950 ℃, keep 1150 ℃ to continue heating 180 minutes, naturally cool to room temperature subsequently, cross decorations ray machine, ultrasonic cleaning and sorted and packaged at last.
Specific embodiment three adds Fe
2O
31234.0Kg, ZnO 366.8Kg, MgO 109.5Kg, CuO 89.5Kg, Mn
3O
45.4Kg.Ball milling 4 hours, ball: material: water: dispersion agent=2:1:0.5:0.3%.Circulation sand milling 6 hours adds concentration and is 8%, massfraction is 13% PVA solution, stirs 30 minutes, and a mist projection granulating is got the particle between 40 orders-120 order, and particle is pressed 2.8g/cm
3Sintering is prepared in green density compression moulding.Adopt the mode of gradient increased temperature in 120 minutes, to rise to 350 ℃ during sintering by room temperature, keep 350 ℃ to continue heating 120 minutes, then in 90 minutes, rise to 650 ℃ by 300 ℃, in 90 minutes, rise to 950 ℃ again by 650 ℃, afterwards, in 90 minutes, rise to 1180 ℃ by 950 ℃, keep 1180 ℃ to continue heating 180 minutes, naturally cool to room temperature subsequently, cross decorations ray machine, ultrasonic cleaning and sorted and packaged at last.
Claims (5)
1. ferrite that contains magnesium, zinc and copper, it is characterized in that: with magnesium oxide 18.2mol% or 18.4mol%, cupric oxide 6～9mol%, zinc oxide 24.5～29mol%, ferric oxide 47～49.5mol% is a principal constituent, has added the trimanganese tetroxide of 0.2～0.5wt% of modifying function in addition.
2. a kind of magnesium that contains as claimed in claim 1, the ferritic preparation method of zinc and copper, comprise wet ball grinding one time, the secondary sand milling, spray shaping, sintering, polishing and cleaning step, it is characterized in that: add 8% during sand milling, massfraction is 13% PVA solution, adopt and once grind the atomizing granulating technology spray shaping, adopt the mode of gradient increased temperature in 120 minutes, to rise to 300 ℃-350 ℃ during sintering by room temperature, keep 300 ℃-350 ℃ to continue heating 120 minutes, then in 120 minutes, rise to 650 ℃ by 300 ℃-350 ℃, in 90 minutes, rise to 950 ℃ again by 650 ℃, afterwards, in 90 minutes, rise to 1100 ℃-1200 ℃ by 950 ℃, keep 1100 ℃-1200 ℃ to continue heating 180 minutes, cool to room temperature naturally at last and get final product.
3. the ferritic preparation method who contains magnesium, zinc and copper as claimed in claim 2 is characterized in that: 4-4.5 hour ball milling time, ball: material: water: dispersion agent=2.0～2.5:1～1.2:0.4～0.6:0.3～0.4; Circulation sand milling 6-6.5 hour adds concentration and is 8%, massfraction is 13% PVA solution, stirs 30 minutes behind the sand milling.
4. the ferritic preparation method of magnesium as claimed in claim 3, zinc and copper is characterized in that: sand milling disposed slurry mean particle size is 1.0-3.0 μ m.
5. the ferritic preparation method of magnesium as claimed in claim 3, zinc and copper is characterized in that: get the particle between 40 orders-120 order behind the mist projection granulating, press 2.8g/cm
3Green density compression moulding.
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| CNB2005100769039A CN100519470C (en) | 2005-06-09 | 2005-06-09 | Ferrite containing magnesium, zinc and copper element and its production method |
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| CNB2005100769039A CN100519470C (en) | 2005-06-09 | 2005-06-09 | Ferrite containing magnesium, zinc and copper element and its production method |
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| CN100519470C true CN100519470C (en) | 2009-07-29 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367645B (en) * | 2008-08-06 | 2011-08-10 | 中国地质大学（北京） | Novel method for preparing ferrite ceramic soft magnetic material |
| CN101417873B (en) * | 2008-10-29 | 2012-05-09 | 江苏晨朗电子集团有限公司 | High permeability Cu-Mg-Zn material and use |
| CN102360678B (en) * | 2011-06-27 | 2013-02-13 | 海安县鹰球粉末冶金有限公司 | Magnetically soft ferrite thermosensitive magnetic core and preparation method thereof |
| CN103641464B (en) * | 2013-11-07 | 2015-06-17 | 横店集团东磁股份有限公司 | An anti-electromagnetic interference magnesium-zinc ferrite material and a preparation method thereof |
| CN106587980A (en) * | 2016-12-23 | 2017-04-26 | 安徽龙磁科技股份有限公司 | La-Co-Ca-Zn-Mg-Bi permanent magnetic ferrite material and preparation method thereof |
| CN109133905A (en) * | 2017-12-27 | 2019-01-04 | 肇庆冠磁科技有限公司 | A kind of preparation method of high magnetic conductivity soft-magnetic ferrite |
| CN109411178A (en) * | 2018-11-01 | 2019-03-01 | 沅陵辰州磁电高科有限公司 | Manganese magnesium zinc soft magnetic materials and preparation method thereof |
-
2005
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Non-Patent Citations (2)
| Title |
|---|
| 低温烧结Mn掺杂Mg-Cu-Zn铁氧体研究. 齐西伟.压电与声光，第25卷第3期. 2003 |
| 低温烧结Mn掺杂Mg-Cu-Zn铁氧体研究. 齐西伟.压电与声光，第25卷第3期. 2003 * |
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Owner name: GUANGXI WUZHOU CITY WEICI SCIENCE CO., LTD. Free format text: FORMER OWNER: GUANGXI CANGWU FENGHUA MAGNETICS CO., LTD. Effective date: 20090925 |
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Effective date of registration: 20090925 Address after: The Guangxi Zhuang Autonomous Region Cangwu County Enyi Industrial Development Zone Patentee after: Wuzhou Guangxi Micro Magnetic Technology Co., Ltd. Address before: Enyi industrial zone of Cangwu County of Cangwu City, the Guangxi Zhuang Autonomous Region Guangxi Cangwu Fenghua magnetics Co. Ltd. Patentee before: Guangxi Cangwu Fenghua Magnetic Member Co., Ltd. |
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