CN106316378A - Y type barium ferrite hollow ceramic microsphere wave-absorbing material - Google Patents
Y type barium ferrite hollow ceramic microsphere wave-absorbing material Download PDFInfo
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- CN106316378A CN106316378A CN201510366673.3A CN201510366673A CN106316378A CN 106316378 A CN106316378 A CN 106316378A CN 201510366673 A CN201510366673 A CN 201510366673A CN 106316378 A CN106316378 A CN 106316378A
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- hollow ceramic
- type barium
- absorbing material
- barium ferrite
- wave
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Abstract
The invention discloses a Y type barium ferrite hollow ceramic microsphere wave-absorbing material. The material is composed of iron powder, zinc powder, barium carbonate, ferric oxide, an oxidant, a carbonizing agent, and an adhesive; wherein the oxidant is sodium percarbonate, the carbonizing agent is polyvinyl alcohol, and the adhesive is acrylic resin. The molecular structural formula of the Y type barium ferrite is Ba<2>Zn<2>Co<0.6>Fe<12>O<22>. A self-reaction quenching method is adopted to prepare the Y type barium ferrite. The heat treatment temperature is 1200 DEG C. The preparation technology is simple. The raw material utilization rate is high. The prepared hollow ceramic microsphere has the characteristics of smooth surface, regular balling, high balling rate, uniform particle size distribution, small particle size, light weight, and high temperature resistance. The Y type barium ferrite hollow ceramic microsphere wave-absorbing material has an excellent wave-absorbing performance. In a range of 2 to 18 GHz, when the thickness is 2.19 mm, the lowest reflection rate can reach -27.52 dB, the corresponding frequency is 12.93 GHz, the absorption bandwidth (less than -10 dB) is 2.54 GHz (12.05 to 14.59 GHz), and thus the material has an important meaning for the development of novel wave-absorbing materials.
Description
Technical field
The present invention relates to formula and the preparation technology of a kind of Y type Barium hexaferrite hollow ceramic microspheres absorbing material,
Belong to inorganic non-metallic technical field of function materials.
Background technology
Along with Information Technology Development, the damaging effect of human health is also become increasingly conspicuous by electromagnetic wave.Traditional electricity
Magnetic shield day is inadequate, and electromagnetic wave absorption is a kind of effectively safeguard procedures.Traditional absorbing material, such as
Conduction high polymer class, ferrite class, nanometer stealthy materials, chiral material, ceramic-like stealth material etc., by
Big in its density, absorb the reason of the aspects such as frequency range is narrow, be difficult to meet stealth material " thin, light, wide,
Requirement by force ", therefore, novel wave-absorbing material be developed into main research direction.
Ferrite, owing to having higher resistivity and pcrmeability, is currently the electro-magnetic wave absorption that research is relatively more
Agent, predominantly spinel-type, carbuncle type and Magnetoplumbate-type.Magneto-plumbite type ferrite is also called plane hexagonal
Ferrite, the coercivity of the Magnetoplumbate-type Barium hexaferrite of typically no doping is the highest, belongs to hard magnetic material, along with
The increase of doped chemical volume, its coercivity and the intensity of magnetization be all gradually reduced, and its magnetic characteristic is close to soft magnetism
Ferrite Material.Main doped chemical has Zn, Co, Ti, Sn, Zr etc., can carry out single doping and also may be used
Carrying out composite mixed, common mainly has M, Y, W, Z, U-shape structure.Generally Ferrite Material due to
Its density is relatively big, makes absorbing material and is difficult to meet light weight and the thin requirement of thickness, therefore also limit it
Application.And hollow ceramic microspheres is preparation technology of ceramic materials to be combined with cenosphere, prepare
A kind of novel wave-absorbing material, this material not only has the spherical structure of hollow and also has absorbing property.
Using autoreaction extinguishing method to be prepared for hollow ceramic microspheres absorbing material at present, the method is to combine certainly
Spread high temperature synthesis techniques (SHS), flame spray technique and quick cooled and solidified technology, utilize oxy-acetylene
Flame ignite self-propagating system, high-temperature injection synthesis and water cooling sedimentation formed cenosphere material new method,
It is that preparation technology of ceramic materials is combined with cenosphere, a kind of novel wave-absorbing material prepared, this
Material not only has the structure of hollow and also has the physical property that ceramic material is excellent.Can be by controlling raw material
Composition, prepare series various configuration and the Barium hexaferrite hollow ceramic microspheres absorbing material of composition, to electricity
The absorption of magnetic wave has good performance, meets the demand for development of lightweight absorbing material, therefore, barium ferrum oxygen
The research of body hollow ceramic microspheres absorbing material has great importance.
Summary of the invention
It is an object of the invention to provide a kind of Y type Barium hexaferrite (Ba2Zn2Fe12O22) hollow ceramic microspheres suction
The formula of wave material and preparation technology.
Y type Barium hexaferrite (Ba2Zn2Fe12O22) formula (mass percent) of hollow ceramic microspheres absorbing material
For:
Wherein oxidant is SODIUM PERCARBONATE, and carburization agent is polyvinyl alcohol, and binding agent is acrylic resin.
The present invention has a following major advantage:
(1) product prepared by the formula of the present invention is utilized, for a kind of Y type Barium hexaferrite (Ba2Zn2Fe12O22)
Hollow ceramic microspheres absorbing material, has that particle diameter is little, light weight and a resistant to elevated temperatures feature；
(2) preparation process condition used by is simple, and raw material is easily prepared, and utilization rate is high, prepared
Product has that yield is big, smooth surface, balling-up rule, balling ratio are high and the advantage of even particle size distribution；
(3) hollow ceramic microspheres prepared by the formula of the present invention is utilized to have excellent absorbing property, in thickness
When degree is for 2.19mm, in 2～18GHz scopes, minimum reflectance is-27.52dB, and corresponding frequency is
12.93GHz, reflectance is less than a width of 2.54GHz of band (12.05～14.59GHz) of-10dB.
Detailed description of the invention
1, the preparation of reunion powder is reacted
According to above-mentioned formula, weighing total amount is the raw material of 230g, adds the dehydrated alcohol of 280mL, mixed
Close uniformly, with the rotating speed of 1500r/min in high speed dispersor, stirring mixing 8h；Then 35.7g is added
Acrylic resin, after stirring, pour in rustless steel container (400mm × 100mm × 50mm),
Put in 80 DEG C of baking ovens, dry 4h；Then in 140 DEG C of baking ovens, carbonization 4h；Put in pulverizer,
High speed pulverization, sieves, it is thus achieved that particle diameter is less than the reunion powder of 150 μm.
2, Y type Barium hexaferrite (Ba2Zn2Fe12O22) preparation of hollow ceramic microspheres absorbing material
Preparation uses autoreaction extinguishing method, and its schematic diagram prepared is shown in Figure of description 1.Accompanying drawing to specifications
1, oxygen and acetylene gas are connected on self-propagating spray gun, open the valve of three steel cylinders respectively, regulate pressure
The pressure of power, oxygen and acetylene gas is respectively not less than 0.5MPa and 0.1MPa；Reunion powder is added spray gun material
In bucket, opening the gas switch on spray gun, light and regulate the size of flame, regulation flame is neutral flame,
Opening hopper switch, reunion powder, under the effect of oxygen jet negative pressure, is inhaled into spray gun, carries out self-propagating
High-temperature nuclei reacts；Jet flames alignment filling with the catcher of cooling water, sprays, jet length is
40cm.Due to the molten drop thing that injection product is high temperature, when it is cooled down by rapid extinguishing when, due to molten drop
The internal a large amount of gases produced cannot shed, and will form the structure of cavity therein, and product is through receiving
Storage settles a period of time, after filtration, puts in 80 DEG C of baking ovens and be dried, collect granular powder, so
After at 1200 DEG C, carry out heat treatment.
3, performance test
(1) SEM photograph of hollow ceramic microspheres and surface EDS collection of illustrative plates
With ZEISSEVO18 type scanning electron microscope (SEM), the surface topography of hollow ceramic microspheres is entered
Row is observed, and result is shown in Figure of description 2.Use U.S.'s thermoelectricity VGR-3 energy disperse spectroscopy (EDS) to hollow pottery
The metallic element of porcelain microballon is analyzed, and the results are shown in Table 1 and Figure of description 3.From Figure of description 2,
The prepared bead material that material is spherical hollow, microballon particle diameter distribution comparison rule, smooth surface.By
Table 1 and Figure of description 3 understand, and it is Fe, Ba, Zn that microballon mainly comprises metallic element, illustrates that it is Y
Type Barium hexaferrite (Ba2Zn2Fe12O22) mainly comprise element, be also the composition of ceramic material.
Table 1 EDS analyzing metal elements weight and atomic percent
(2) XRD analysis of hollow ceramic microspheres
Use BRUKER D2 PHASER X-ray diffractometer (XRD) that hollow ceramic microspheres is carried out thing
Facies analysis, CuKα1Beam wavelength λ=0.154056nm, scanning step 0.05 °, result is shown in Figure of description
4.From Figure of description 4, the thing of the main diffraction peak of hollow ceramic microspheres is Ba mutually2Zn2Fe12O22,
This material is the Barium hexaferrite of a kind of Y type, the most a small amount of Fe3O4、Fe2O3And BaFe12O19Thing
Phase constituent.
(3) absorbing property of hollow ceramic microspheres
It is 4: 1 by hollow ceramic microspheres and paraffin according to mass ratio, after mix homogeneously, in being pressed in a mold
Footpath is 3.0mm, external diameter is 7.0mm, thickness is the loop sample of 2.19mm, uses Agilent N5242A
Network vector instrument and 85055APC-7mm coaxial air line, test its electromagnetism in 0.5～18GHz ginseng
Number, then calculates its reflectance, and result is shown in Figure of description 5.From Figure of description 5,2～18GHz
Scope, the Barium hexaferrite hollow ceramic microspheres of this Y type when its thickness is 2.19mm, minimum reflectance
For-27.52dB, corresponding frequency is 12.93GHz, and reflectance is less than a width of 2.54GHz of band of-10dB
(12.05～14.59GHz), thus this Y type Barium hexaferrite hollow ceramic microspheres material has certain suction ripple
Performance.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that autoreaction extinguishing method prepares hollow ceramic microspheres；Fig. 2 is hollow ceramic microspheres
SEM schemes；Fig. 3 is the EDS figure of hollow ceramic microspheres；Fig. 4 is the XRD figure of hollow ceramic microspheres；Figure
5 is the suction wave reflection rate curve chart of hollow ceramic microspheres.
Claims (4)
1. a Y type Barium hexaferrite hollow ceramic microspheres absorbing material, it is characterised in that its formula and content (matter
Amount percentage ratio) be: iron powder 13.9%, zinc powder 5.1%, brium carbonate 7.7%, iron sesquioxide 29.8%, oxygen
Agent 17.1%, carburization agent 10.9%, binding agent 15.5%.
A kind of Y type Barium hexaferrite hollow ceramic microspheres absorbing material the most according to claim 1, it is special
Levying and be that its oxidant used is SODIUM PERCARBONATE, carburization agent is polyvinyl alcohol, and binding agent is acrylic acid tree
Fat.
A kind of Y type Barium hexaferrite hollow ceramic microspheres absorbing material the most according to claim 1, it is special
Levy and be that its molecular structural formula is Ba2Zn2Fe12O22。
A kind of Y type Barium hexaferrite hollow ceramic microspheres absorbing material the most according to claim 1, it is special
Levy and be that its heat treatment temperature is 1200 DEG C.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1340716A1 (en) * | 2000-11-21 | 2003-09-03 | Japan Science and Technology Corporation | Ferrite thin film for high frequency and method for preparation thereof |
| CN1848316A (en) * | 2006-04-12 | 2006-10-18 | 北京科技大学 | Method for interal supplying oxygen self-spreading high-temperature synthetizing MnZn ferrite |
| CN104658732A (en) * | 2013-11-25 | 2015-05-27 | 中国人民解放军军械工程学院 | New Al-Ni-Co hollow magnetic microsphere microwave absorbing material |
-
2015
- 2015-06-30 CN CN201510366673.3A patent/CN106316378A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1340716A1 (en) * | 2000-11-21 | 2003-09-03 | Japan Science and Technology Corporation | Ferrite thin film for high frequency and method for preparation thereof |
| CN1848316A (en) * | 2006-04-12 | 2006-10-18 | 北京科技大学 | Method for interal supplying oxygen self-spreading high-temperature synthetizing MnZn ferrite |
| CN104658732A (en) * | 2013-11-25 | 2015-05-27 | 中国人民解放军军械工程学院 | New Al-Ni-Co hollow magnetic microsphere microwave absorbing material |
Non-Patent Citations (4)
| Title |
|---|
| 夏德贵等: "《软磁铁氧体制造原理与技术》", 31 December 2010, 陕西科学技术出版社 * |
| 蔡旭东等: "热处理温度对空心复相陶瓷微珠结构与微波电磁性能的影响", 《硅酸盐学报》 * |
| 许宝才等: "含Mn复合空心微珠的自反应淬熄法制备与吸波性能研究", 《稀有金属材料与工程》 * |
| 许宝才等: "添加Zn对自反应淬熄法制备Mn-铁氧体空心微珠相结构与性能的影响", 《稀有金属材料与工程》 * |
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