CN104876562A - Anti-electromagnetic interference soft-magnetic ferrite material and preparation method thereof - Google Patents
Anti-electromagnetic interference soft-magnetic ferrite material and preparation method thereof Download PDFInfo
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- CN104876562A CN104876562A CN201510172782.1A CN201510172782A CN104876562A CN 104876562 A CN104876562 A CN 104876562A CN 201510172782 A CN201510172782 A CN 201510172782A CN 104876562 A CN104876562 A CN 104876562A
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Abstract
The invention discloses an anti-electromagnetic interference soft-magnetic ferrite material and a preparation method thereof. The anti-electromagnetic interference soft-magnetic ferrite material is characterized by being prepared from the following raw materials in parts by weight: 50-70 parts of iron sesquioxide, 10-20 parts of nickel oxide, 20-30 parts of zinc oxide, 0.1-0.3 part of tungsten oxide, 0.1-0.2 part of boron nitride, 0.1-0.3 part of polyvinylpyrrolidone, 0.4-1 part of saw dust, 0.02-0.06 part of sodium lignin sulfonate, 2-4 parts of organic silicon resin and an appropriate amount of deionized water. According to the anti-electromagnetic interference soft-magnetic ferrite material, the added tungsten oxide is capable of improving the initial permeability of the ferrite material and the added boron nitride is capable of improving the strength of the material; the soft-magnetic ferrite material is simple in production process, excellent in anti-electromagnetic interference property, high in production efficiency, wide in application range and worthy of popularization; besides, the purposes of energy conservation and emission reduction are achieved.
Description
Technical field
The present invention relates to soft magnetic ferrite field, be specifically related to a kind of electromagnetism interference soft magnetic ferrite and preparation method thereof.
Background technology
Soft magnetic materials, mainly based on MnZn, nickel-zinc ferrite, is a kind of important electronic functional material.Due to nickel-zinc ferrite there is high permeability, high resistivity, frequency of utilization are high, are widely used in computer, communication, consumer electronics etc.Now, electronic product is to dull and stereotyped, slim, surface mount future development, and soft magnetic components size is more and more less, requires more and more higher to magnetic core intensity and thermal shock resistance.Except the electrical property of high magnetic permeability, high BS, the electromagnetism interference performance of magnetic core becomes new Key Performance Indicator.The present invention is by adding Tungsten oxide 99.999 and boron nitride, and the technique that design is unique, improve electromagnetism interference and the intensity of magnetic core, and overcome the defect that Addition ofelements reduces soft magnet performance, there is very large prospect meaning.
Summary of the invention
The object of this invention is to provide a kind of electromagnetism interference soft magnetic ferrite and preparation method thereof.
In order to realize object of the present invention, the present invention is by following scheme implementation:
A kind of electromagnetism interference soft magnetic ferrite and preparation method thereof, is made up of the raw material of following weight part: ferric oxide 50-70, nickel oxide 10-20, zinc oxide 20-30, Tungsten oxide 99.999 0.1-0.3, boron nitride 0.1-0.2, polyvinylpyrrolidone 0.1-0.3, sawdust 0.4-1, sodium lignosulfonate 0.02-0.06, silicone resin 2-4, deionized water are appropriate;
A kind of electromagnetism interference soft magnetic ferrite of the present invention and preparation method thereof, be made up of following concrete steps:
(1) sawdust is cleaned up post-drying to pulverize, then ferric oxide, nickel oxide, zinc oxide, sawdust and deionized water are added in ball mill and carry out wet ball grinding and mix, Ball-milling Time is 6h;
(2) powder of step (1) gained is placed in sintering oven and carries out pre-burning, calcined temperature controls at 700-800 ° of C, and burn-in time is 120min;
(3) Tungsten oxide 99.999 is become with boron nitride ball milling after nano-powder and mix with polyvinylpyrrolidone, sodium lignosulfonate, be added to mechanical stirring in mixer to mix, transfer in ultrasonator, adding appropriate deionized water ultrasonic disperse 20-40min, to obtain dispersion liquid for subsequent use again;
(4) by the dispersion liquid mixing and stirring of gained in the powder of step (2) pre-burning and step (3), granulation, adopt half dry-pressing compression moulding, blank is put into sintering oven, adopt nitrogen as shielding gas, be 1000-1300 ° of C in sintering temperature, soaking time is that 120-180min sinters, and is cooled to room temperature after terminating;
(5) hexamethyldisiloxane of silicone resin with 4-6 times of weight part diluted, then be impregnated in silicone resin solution by the blank of step (4), flood 2-3 time, each 3-5min, after dry solidification.
Advantage of the present invention is: the present invention adds sawdust and carries out pre-burning, add the surfaceness of soft magnetic ferrite, enhance the compactness of blank, adopt half dry-pressing compression moulding, economizing on resources also, environmental pollution is little, at the silicone resin of the surface-coated of blank, enhance the round and smooth of blank surface, planarization and wear resistance, and reduce the wastage, the Tungsten oxide 99.999 added has the initial permeability improving Ferrite Material, the boron nitride of adding adds the intensity of material, soft magnetic ferrite production technique of the present invention is simple, there is good electromagnetism interference performance, production efficiency is high, energy-saving and emission-reduction, use range is wide, be worthy to be popularized.
Embodiment
Below by specific examples, the present invention is described in detail.
A kind of electromagnetism interference soft magnetic ferrite and preparation method thereof, is made up of the raw material of following weight part (kilogram): ferric oxide 54, nickel oxide 16, zinc oxide 26, Tungsten oxide 99.999 0.3, boron nitride 0.2, polyvinylpyrrolidone 0.2, sawdust 0.7, sodium lignosulfonate 0.03, silicone resin 3, deionized water are appropriate;
A kind of electromagnetism interference soft magnetic ferrite of the present invention and preparation method thereof, be made up of following concrete steps:
(1) sawdust is cleaned up post-drying to pulverize, then ferric oxide, nickel oxide, zinc oxide, sawdust and deionized water are added in ball mill and carry out wet ball grinding and mix, Ball-milling Time is 6h;
(2) powder of step (1) gained is placed in sintering oven and carries out pre-burning, calcined temperature controls at 750 ° of C, and burn-in time is 120min;
(3) Tungsten oxide 99.999 is become with boron nitride ball milling after nano-powder and mix with polyvinylpyrrolidone, sodium lignosulfonate, be added to mechanical stirring in mixer to mix, transfer in ultrasonator, adding appropriate deionized water ultrasonic disperse 30min, to obtain dispersion liquid for subsequent use again;
(4) by the dispersion liquid mixing and stirring of gained in the powder of step (2) pre-burning and step (3), granulation, adopt half dry-pressing compression moulding, blank is put into sintering oven, adopt nitrogen as shielding gas, be 1210 ° of C in sintering temperature, soaking time is that 160min sinters, and is cooled to room temperature after terminating;
(5) hexamethyldisiloxane of silicone resin with 4 times of weight parts diluted, then be impregnated in silicone resin solution by the blank of step (4), flood 2 times, each 5min, after dry solidification.
The performance data of the soft magnetic ferrite obtained by above-described embodiment:
Initial permeability (25 ± 3 ° of C): 4800 ± 25%;
Power loss (100Kc, 200mT, KW/m3): 523(25 ± 2 ° C), 235(100 ± 2 ° C);
Saturation magnetic flux density (mT, 100 ° of C): 438;
Curie temperature (° C) > 236.
Claims (2)
1. electromagnetism interference soft magnetic ferrite and preparation method thereof, it is characterized in that, be made up of the raw material of following weight part: ferric oxide 50-70, nickel oxide 10-20, zinc oxide 20-30, Tungsten oxide 99.999 0.1-0.3, boron nitride 0.1-0.2, polyvinylpyrrolidone 0.1-0.3, sawdust 0.4-1, sodium lignosulfonate 0.02-0.06, silicone resin 2-4, deionized water are appropriate.
2. a kind of electromagnetism interference soft magnetic ferrite and preparation method thereof according to claim 1, is characterized in that, be made up of following concrete steps:
(1) sawdust is cleaned up post-drying to pulverize, then ferric oxide, nickel oxide, zinc oxide, sawdust and deionized water are added in ball mill and carry out wet ball grinding and mix, Ball-milling Time is 6h;
(2) powder of step (1) gained is placed in sintering oven and carries out pre-burning, calcined temperature controls at 700-800 ° of C, and burn-in time is 120min;
(3) Tungsten oxide 99.999 is become with boron nitride ball milling after nano-powder and mix with polyvinylpyrrolidone, sodium lignosulfonate, be added to mechanical stirring in mixer to mix, transfer in ultrasonator, adding appropriate deionized water ultrasonic disperse 20-40min, to obtain dispersion liquid for subsequent use again;
(4) by the dispersion liquid mixing and stirring of gained in the powder of step (2) pre-burning and step (3), granulation, adopt half dry-pressing compression moulding, blank is put into sintering oven, adopt nitrogen as shielding gas, be 1000-1300 ° of C in sintering temperature, soaking time is that 120-180min sinters, and is cooled to room temperature after terminating;
(5) hexamethyldisiloxane of silicone resin with 4-6 times of weight part diluted, then be impregnated in silicone resin solution by the blank of step (4), flood 2-3 time, each 3-5min, after dry solidification.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262950A (en) * | 2010-05-31 | 2011-11-30 | 比亚迪股份有限公司 | Soft nickel-zinc-copper magnetic ferrite and preparation method thereof |
| CN102344283A (en) * | 2010-07-29 | 2012-02-08 | 比亚迪股份有限公司 | Magnesium-zinc soft magnetic ferrite and preparation method thereof |
| 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 |
| CN104045333A (en) * | 2014-05-21 | 2014-09-17 | 肇庆冠磁科技有限公司 | NiZn soft magnetic ferrite and preparation method thereof |
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2015
- 2015-04-14 CN CN201510172782.1A patent/CN104876562A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262950A (en) * | 2010-05-31 | 2011-11-30 | 比亚迪股份有限公司 | Soft nickel-zinc-copper magnetic ferrite and preparation method thereof |
| CN102344283A (en) * | 2010-07-29 | 2012-02-08 | 比亚迪股份有限公司 | Magnesium-zinc soft magnetic ferrite and preparation method thereof |
| 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 |
| CN104045333A (en) * | 2014-05-21 | 2014-09-17 | 肇庆冠磁科技有限公司 | NiZn soft magnetic ferrite and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 唐道济等: "《新编无线电元器件应用手册》", 31 October 1990, 南京：江苏科学技术出版社 * |
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Application publication date: 20150902 |