CN102173762A - Ferrite wave-absorbing material used for injection moulding, preparation method thereof and magnetic wave-absorbing element - Google Patents
Ferrite wave-absorbing material used for injection moulding, preparation method thereof and magnetic wave-absorbing element Download PDFInfo
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- CN102173762A CN102173762A CN2010106023954A CN201010602395A CN102173762A CN 102173762 A CN102173762 A CN 102173762A CN 2010106023954 A CN2010106023954 A CN 2010106023954A CN 201010602395 A CN201010602395 A CN 201010602395A CN 102173762 A CN102173762 A CN 102173762A
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Abstract
The invention discloses a ferrite wave-absorbing material used for injection moulding, a preparation method thereof and a magnetic wave-absorbing element. The molecular formula of the wave-absorbing material is A2(Bx+C2-x)Fe12O22, wherein A is Sr or Ba, B and C are selected from Mn, Ni, Zn, Mg, Co, Cu or Ca, x is no less than 0 and no more than 2. The invention also provides the preparation method of the wave-absorbing material and the magnetic wave-absorbing element. A fluxing agent is introduced in the preparation of the ferrite wave-absorbing material, thus the free growth of crystal particles can be ensured, the bond strength between crystal particles can be reduced simultaneously, ideal hexagonal flaky crystal particles can be obtained, and the surface density of the wave-absorbing material can be effectively reduced; and injection moulding is utilized for moulding, thus the wave-absorbing element with order crystal particles and complex shape can be prepared. The wave-absorbing material disclosed by the invention can be used in different electromagnetic environments and have wide application value in the aspects for preventing the influences of electromagnetic radiation on a human body and equipment, improving the pollutions of the space electromagnetic environment and the like.
Description
Technical field
The present invention relates to the preparation field of ferrite wave-absorbing material, especially relate to a kind of injection molding ferrite wave-absorbing material and preparation method thereof that is used for and inhale wave device with magnetic.
Background technology
Along with human production activity's continuous development, the continuous progress of industrial civilization, the electromagnetic radiation that each class of electronic devices, intelligent terminal, communication system etc. cause is more and more, becomes the public hazards of global range gradually.This electromagnetic radiation has brought tangible influence to the reliability and the accuracy of all kinds of electric elements, and the harm of human body is also extensively confirmed by medical circle institute.How to protect the important topic that electromagnetic radiation becomes global scientific and technological circle effectively.
At present, often adopt absorbing material to make the suction wave device and be applied in the electronics, play the reduction electromagnetic radiation, the lossy medium of absorbing material is divided into electrical loss type and magnetic hysteresis loss type two big classes, and Ferrite Material belongs to the magnetic hysteresis loss class.Ferrite Material has frequency response characteristic preferably, and its relative magnetic permeability is bigger, and relative permittivity is less, has widespread use in 1～40GHz frequency range.But traditional Ferrite Material density is big, thickness is thicker, can't injection molding, can't make complex-shaped suction wave device, and use range is very limited.
Summary of the invention
Based on the existing in prior technology problem, embodiment of the present invention provides a kind of injection molding ferrite wave-absorbing material and preparation method thereof that is used for to inhale wave device with magnetic, the area density of this ferrite wave-absorbing material is low, make things convenient for injection molding, and then be convenient to make crystal grain marshalling, complex-shaped suction wave device.
The objective of the invention is to be achieved through the following technical solutions:
Embodiment of the present invention provides a kind of injection molding ferrite wave-absorbing material that is used for, and the molecular formula of this absorbing material is: A
2(B
x+ C
2-x) Fe
12O
22In the above-mentioned molecular formula: A is Sr or Ba, and B, C are any among Mn, Ni, Zn, Mg, Co, Cu or the Ca, and the x span is: 0≤x≤2.
Embodiment of the present invention also provides a kind of preparation method who is used for injection molding ferrite wave-absorbing material, comprising:
Adopt following raw material, comprising:
Fusing assistant, raw material one be in Strontium carbonate powder or the barium carbonate any, raw material two, three in manganese oxide, manganous carbonate, nickel oxide, nickelous carbonate, zinc oxide, zinc carbonate, magnesium oxide, magnesiumcarbonate, cobalt oxide, cobaltous carbonate, cupric oxide, copper carbonate, calcium oxide or the lime carbonate any, raw material four is ferric oxide;
Wherein, each raw material consumption is: raw material one: raw material two adds raw material three consumption sums: the mol ratio of raw material four is: 2: 2: 6;
The consumption of fusing assistant is: raw material one adds the consumption sum of raw material two, raw material three and raw material four: the mol ratio of fusing assistant is: 1: 0.5～2;
Above-mentioned raw materials one to four is mixed, add fusing assistant in the mixed raw material and stir, and oven dry, compression moulding, under 900～1300 ℃ of temperature, carry out sintering, sintering is after the powder that fragmentation, filter wash, grinding make is absorbing material, and the molecular formula of the described absorbing material that makes is: A
2(B
x+ C
2-x) Fe
12O
22, A is Sr or Ba in described molecular formula, and B, C are any among Mn, Ni, Zn, Mg, Co, Cu or the Ca, and the x span is: 0≤x≤2.
Embodiment of the present invention further provides a kind of magnetic to inhale wave device, and it is to be raw material with above-mentioned absorbing material that this magnetic is inhaled wave device, is prepared from injection molding mode.
The technical scheme that provides by the embodiment of the invention as can be seen, in the embodiment of the invention by the low temperature fusing assistant being incorporated in the preparation of ferrite wave-absorbing material, guarantee freely growing of crystal grain, reduce intercrystalline bonding strength simultaneously, and then obtain the crystal grain of ideal hexagonal sheet type, can effectively reduce the area density of the absorbing material that makes, make this absorbing material conveniently utilize the injection technique moulding, thereby can make crystal grain marshalling, complex-shaped suction wave device.
Description of drawings
The reflection of electromagnetic wave rate curve of the absorbing material that Fig. 1 makes for the embodiment of the invention 2;
The reflection of electromagnetic wave rate curve of the absorbing material that Fig. 2 makes for the embodiment of the invention 3.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Present embodiment provides a kind of injection molding ferrite wave-absorbing material that is used for, and the molecular formula of this absorbing material is:
A
2(B
x+C
2-x)Fe
12O
22
In the above-mentioned molecular formula: A is Sr (strontium) or Ba (barium), and B, C are any among Mn (manganese), Ni (nickel), Zn (zinc), Mg (magnesium), Co (cobalt), Cu (copper) or the Ca (calcium), and the x span is: 0≤x≤2.
The preparation method of above-mentioned absorbing material is specially:
Adopt following raw material, comprising:
Fusing assistant can adopt in calcium oxide, magnesium oxide, bismuth oxide, strontium chloride, the bariumchloride any;
Raw material one adopts any in Strontium carbonate powder or the barium carbonate;
Raw material two, three adopts any in manganese oxide, manganous carbonate, nickel oxide, nickelous carbonate, zinc oxide, zinc carbonate, magnesium oxide, magnesiumcarbonate, cobalt oxide, cobaltous carbonate, cupric oxide, copper carbonate, calcium oxide or the lime carbonate;
Raw material four adopts ferric oxide;
The consumption of each raw material is: raw material one: raw material two and raw material three consumption sums: the mol ratio of raw material four is: 2: 2: 6; Wherein, raw material two can be selected arbitrarily with the consumption of raw material three, adds up to 2 mol ratio as long as guarantee both.
The consumption of fusing assistant is: the mol ratio of fusing assistant and raw material one is: 0.5～2: 1;
After raw material one, two, three and raw material four mixing, add as fusing assistant then and stir, oven dry, compression moulding under 1.0～2.0MPa pressure under 100～150 ℃ of temperature, forming composition was carried out sintering 1～10 hour under 900～1300 ℃ of temperature, sintering is after the powder that fragmentation, filter wash, grinding make is absorbing material.
In the reality, above-mentioned absorbing material preparation method is specific as follows:
(1) with 2mol barium carbonate (raw material one), 0.5～2.0mol nickelous carbonate (raw material two), 0.1～1.0mol cobaltous carbonate (raw material three) and 6mol ferric oxide (raw material four) mix, wherein, raw material two is 2mol with the consumption sum of raw material three, then mixed raw material is dropped into ball milling wet mixing 1～5 hour (ratio of grinding media to material is 10: 1);
(2) add fusing assistant bariumchloride 0.5～2mol, stir, under 100～150 ℃ of temperature, dry, adopt 1.0～2.0MPa pressure to be pressed;
(3) forming composition was carried out sintering 1～10 hour under 900～1300 ℃ of temperature;
(4) magnetic patch after the pre-burning is broken into the fritter of diameter≤5mm, dropped into the ball milling wet-milling then 0.5～2 hour (it is 10: 1 that ratio of grinding media to material is set);
(5) clean with clear water, 100～150 ℃ of oven dry down after the proof press dispersion, promptly make the absorption agent powder.
Utilize the above-mentioned absorption agent powder body material that makes to prepare when inhaling wave device,, make the magnet of needs shape according to the shape injection molding of design and inhale wave device by injection technique.
Embodiment 2:
Present embodiment provides a kind of absorbing material of prior art for preparing, is specially:
With 0.1mol BaCO
3Powder, 0.07mol NiO powder, 0.03mol ZnO powder and 0.3mol Fe
2O
3The powder weighing is good, drops into ball milling wet mixing 5 hours (ratio of grinding media to material is 10: 1); Add fusing assistant 0.1mol, stir, oven dry, dry-pressing formed (moulding pressure 1.5MPa); By insulation in 6 hours to the 1200 ℃ pre-burning in 4 hours that heats up; Magnetic patch after the pre-burning is broken into fritter, dropped into the ball milling wet-milling then 1 hour (ratio of grinding media to material is 10: 1); Clean, dry, disperse, make the absorption agent powder; By injection technique, make the magnet that needs and inhale wave device.The reflection of electromagnetic wave rate curve of the absorbing material that this comparing embodiment 2 makes is seen accompanying drawing 1, as can be seen from Figure 1 at the 9GHz place peak value is arranged, and reflectivity is-4.5dB to have absorbing property preferably.
Embodiment 3:
Present embodiment provides a kind of absorbing material of prior art for preparing, is specially:
With 0.1mol SrCO
3Powder, 0.07mol MgO powder, 0.03mol ZnO powder and 0.3mol Fe
2O
3The powder weighing is good, drops into ball milling wet mixing 3 hours (ratio of grinding media to material is 10: 1); Add fusing assistant 0.2mol, stir, oven dry, dry-pressing formed (moulding pressure 1.5MPa); By insulation in 6 hours to the 1200 ℃ pre-burning in 4 hours that heats up; Magnetic patch after the pre-burning is broken into fritter, dropped into the ball milling wet-milling then 1 hour (ratio of grinding media to material is 10: 1); Clean, dry, disperse, make the absorption agent powder; By injection technique, make the magnet that needs and inhale wave device.The reflection of electromagnetic wave rate curve of the absorbing material that this comparing embodiment 2 makes is seen accompanying drawing 2, as can be seen from Figure 2 at the 4GHz place peak value is arranged, and reflectivity is-4.3dB to have absorbing property preferably.
In sum, in the embodiment of the invention by the low temperature fusing assistant being incorporated in the preparation of ferrite wave-absorbing material, guarantee freely growing of crystal grain, reduce intercrystalline bonding strength simultaneously, and then obtain the crystal grain of ideal hexagonal sheet type, can effectively reduce the area density of the absorbing material that makes, make this absorbing material conveniently utilize the injection technique moulding, thereby can make crystal grain marshalling, complex-shaped suction wave device.The absorbing material of the embodiment of the invention can be applied under the different electromagnetic environments, prevents electromagnetic radiation to the harm of human body and to the influence of equipment, improves aspect such as space electromagnetic environment pollution and is with a wide range of applications.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. one kind is used for injection molding ferrite wave-absorbing material, it is characterized in that, the molecular formula of this absorbing material is:
A
2(B
x+C
2-x)Fe
12O
22
In the above-mentioned molecular formula: A is Sr or Ba, and B, C are any among Mn, Ni, Zn, Mg, Co, Cu or the Ca, and the x span is: 0≤x≤2.
2. a preparation method who is used for injection molding ferrite wave-absorbing material is characterized in that, comprising:
Adopt following raw material, comprising:
Fusing assistant, raw material one be in Strontium carbonate powder or the barium carbonate any, raw material two, three in manganese oxide, manganous carbonate, nickel oxide, nickelous carbonate, zinc oxide, zinc carbonate, magnesium oxide, magnesiumcarbonate, cobalt oxide, cobaltous carbonate, cupric oxide, copper carbonate, calcium oxide or the lime carbonate any, raw material four is ferric oxide;
Wherein, each raw material consumption is: raw material one: raw material two adds raw material three consumption sums: the mol ratio of raw material four is: 2: 2: 6;
The consumption of fusing assistant is: the mol ratio of fusing assistant and raw material one is: 0.5～2: 1;
Above-mentioned raw materials one to four is mixed, add fusing assistant in the mixed raw material and stir, and oven dry, compression moulding, under 900～1300 ℃ of temperature, carry out sintering, sintering is after the powder that fragmentation, filter wash, grinding make is absorbing material, and the molecular formula of the described absorbing material that makes is: A
2(B
x+ C
2-x) Fe
12O
22, A is Sr or Ba in described molecular formula, and B, C are any among Mn, Ni, Zn, Mg, Co, Cu or the Ca, and the x span is: 0≤x≤2.
3. the preparation method who is used for injection molding ferrite wave-absorbing material according to claim 2 is characterized in that, described above-mentioned each raw material is mixed into: three kinds of raw materials are dropped in the ball mills, and it is 10: 1 that ratio of grinding media to material is set, wet mixing 1～5 hour.
4. the preparation method who is used for injection molding ferrite wave-absorbing material according to claim 2 is characterized in that, add fusing assistant in the described mixed raw material and stir, and oven dry, compression moulding is:
To add in calcium oxide, magnesium oxide, bismuth oxide, strontium chloride, the bariumchloride any in the mixed raw material as fusing assistant, and stir, dry under 100～150 ℃ of temperature, drying time is 6～12 hours, is pressed under the pressure of 1.0～2.0MPa.
5. the preparation method who is used for injection molding ferrite wave-absorbing material according to claim 2 is characterized in that, described to carry out the agglomerating time under 900～1300 ℃ of temperature be 1～10 hour.
6. the preparation method who is used for injection molding ferrite wave-absorbing material according to claim 2 is characterized in that, described sintering after the powder that fragmentation, filter wash, grinding make be:
Carry out fragmentation behind the sintering, and broken thing is put in the ball mill, it is 10: 1 that ratio of grinding media to material is set, and carries out wet-milling and makes powder in 0.5～2 hour.
7. according to claim 2 or the 6 described preparation methods that are used for injection molding ferrite wave-absorbing material, it is characterized in that described method further comprises:
With the powder that grinding makes further clean, oven dry and dispersion treatment.
8. a magnetic is inhaled wave device, it is characterized in that, it is to be raw material with the described absorbing material of claim 1 that this magnetic is inhaled wave device, is prepared from injection molding mode.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757230A (en) * | 2012-06-28 | 2012-10-31 | 重庆大学 | Method for preparing strontium-zinc-iron ternary composite magnetic material |
| CN103011792A (en) * | 2012-12-18 | 2013-04-03 | 电子科技大学 | Method for preparing millimeter waveband electromagnetic wave absorbing agent |
| CN103086707A (en) * | 2013-01-16 | 2013-05-08 | 陕西科技大学 | Preparation method for Ni-Mn-Co multi-doped barium ferrite wave-absorbing material |
| CN103467082A (en) * | 2013-09-02 | 2013-12-25 | 电子科技大学 | W-type ferrite absorbent for millimeter waves |
| CN103778985A (en) * | 2012-10-25 | 2014-05-07 | 齐红波 | Radiation-protection wave-absorbing powder, manufacturing method thereof and amplitude limiting and clipping device |
| WO2015043347A1 (en) * | 2013-09-25 | 2015-04-02 | Byd Company Limited | Wave absorbing material and method of preparing the same |
| CN108929654A (en) * | 2018-06-28 | 2018-12-04 | 陕西科技大学 | A kind of preparation method of barium ferrite@cobalt oxide composite wave-suction material |
| CN111154295A (en) * | 2020-01-15 | 2020-05-15 | 吉安市中意陶瓷化工有限公司 | Environment-friendly green inorganic pigment and preparation method thereof |
| CN113549407A (en) * | 2021-08-18 | 2021-10-26 | 深圳市英诺美达科技有限公司 | High-performance single-sided adhesive tape |
| CN115196955A (en) * | 2022-08-01 | 2022-10-18 | 苏州银琈玛电子科技有限公司 | Y-type hexagonal ferrite material, preparation method thereof and microwave device |
| CN115536378A (en) * | 2022-09-16 | 2022-12-30 | 山东麦格智芯机电科技有限公司 | Preparation method of high-uniformity multi-stage magnetic ring ferrite |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757230A (en) * | 2012-06-28 | 2012-10-31 | 重庆大学 | Method for preparing strontium-zinc-iron ternary composite magnetic material |
| CN103778985A (en) * | 2012-10-25 | 2014-05-07 | 齐红波 | Radiation-protection wave-absorbing powder, manufacturing method thereof and amplitude limiting and clipping device |
| CN103011792A (en) * | 2012-12-18 | 2013-04-03 | 电子科技大学 | Method for preparing millimeter waveband electromagnetic wave absorbing agent |
| CN103011792B (en) * | 2012-12-18 | 2014-04-30 | 电子科技大学 | Method for preparing millimeter waveband electromagnetic wave absorbing agent |
| CN103086707B (en) * | 2013-01-16 | 2014-12-24 | 陕西科技大学 | Preparation method for Ni-Mn-Co multi-doped barium ferrite wave-absorbing material |
| CN103086707A (en) * | 2013-01-16 | 2013-05-08 | 陕西科技大学 | Preparation method for Ni-Mn-Co multi-doped barium ferrite wave-absorbing material |
| CN103467082A (en) * | 2013-09-02 | 2013-12-25 | 电子科技大学 | W-type ferrite absorbent for millimeter waves |
| WO2015043347A1 (en) * | 2013-09-25 | 2015-04-02 | Byd Company Limited | Wave absorbing material and method of preparing the same |
| US10308555B2 (en) | 2013-09-25 | 2019-06-04 | Byd Company Limited | Wave-absorbing materials and methods for preparing the same |
| CN108929654A (en) * | 2018-06-28 | 2018-12-04 | 陕西科技大学 | A kind of preparation method of barium ferrite@cobalt oxide composite wave-suction material |
| CN111154295A (en) * | 2020-01-15 | 2020-05-15 | 吉安市中意陶瓷化工有限公司 | Environment-friendly green inorganic pigment and preparation method thereof |
| CN113549407A (en) * | 2021-08-18 | 2021-10-26 | 深圳市英诺美达科技有限公司 | High-performance single-sided adhesive tape |
| CN115196955A (en) * | 2022-08-01 | 2022-10-18 | 苏州银琈玛电子科技有限公司 | Y-type hexagonal ferrite material, preparation method thereof and microwave device |
| CN115536378A (en) * | 2022-09-16 | 2022-12-30 | 山东麦格智芯机电科技有限公司 | Preparation method of high-uniformity multi-stage magnetic ring ferrite |
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Application publication date: 20110907 |