CN106316379A - W type barium ferrite hollow ceramic microsphere wave-absorbing material - Google Patents
W type barium ferrite hollow ceramic microsphere wave-absorbing material Download PDFInfo
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- CN106316379A CN106316379A CN201510366716.8A CN201510366716A CN106316379A CN 106316379 A CN106316379 A CN 106316379A CN 201510366716 A CN201510366716 A CN 201510366716A CN 106316379 A CN106316379 A CN 106316379A
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- hollow ceramic
- type barium
- absorbing material
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Abstract
The invention discloses a W type barium ferrite hollow ceramic microsphere wave-absorbing material. The material is composed of iron powder, zinc powder, barium carbonate, ferric oxide, cobalt carbonate, an oxygen increasing agent, a carbonizing agent, and an adhesive; wherein the oxygen increasing agent is potassium perchlorate, the carbonizing agent is cane sugar, and the adhesive is epoxy resin (E51). The molecular structural formula of the W type barium ferrite is BaZn<1.4>Co<0.6>Fe<16>O<27>. A self-reaction quenching method is adopted to prepare the W type barium ferrite. The heat treatment temperature is 1350 DEG C. The preparation technology is simple. The raw material utilization rate is high. The balling of prepared hollow ceramic microsphere is regular. The particle size distribution is uniform. The balling rate is high, and the wave-absorbing material has the characteristics of small particle size, light weight, and high temperature resistance. The W 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 3.05 mm, the lowest reflection rate can reach -42.55 dB, the corresponding frequency is 10.91 GHz, the absorption bandwidth (less than -10 dB) is 2.10 GHz (9.86 to 11.96 GHz), and thus the material has an important meaning for the development of novel radar wave-absorbing materials.
Description
Technical field
The present invention relates to formula and the preparation technology of a kind of W type Barium hexaferrite hollow ceramic microspheres absorbing material,
Belong to inorganic non-metallic technical field of function materials.
Background technology
Along with the development of military technology, the modern detection such as radar, infrared, laser and guidance technology are a large amount of
It is applied in armament systems, makes the existence of ground force's armament systems be threatened greatly.In recent years, the world is each
Military power studies radar-wave absorbing stealth material mutually, traditional absorbing material, such as conduction high polymer class,
Ferrite class, nanometer stealthy materials, chiral material, ceramic-like stealth material etc., owing to its density is big, suction
The reason of the aspects such as receipts frequency range is narrow, is difficult to meet the requirement of stealth material " thin, light, wide, strong ", therefore,
New Type Radar absorbing material be developed into main research direction.
Cenosphere is a kind of Multifunction material, at present, has been obtained by various methods or has synthesized
Variety classes and there is the cenosphere of certain special composition and purposes, such as coal fly ash hollow micro bead,
Hollow glass micropearl, hollow carbon microballon, ceramic hollow microballon etc..Cenosphere not only can reduce material
Density, and the performances such as the rigidity of material, intensity, insulating properties can be improved.About to cenosphere electromagnetism
The research of aspect of performance, mainly with it as matrix, obtains having certain electromagnetism by process for modifying surface
The composite hollow bead material of characteristic, but mostly there is complex technical process, mistake in process for modifying surface technique
Journey is wayward, cost is high and yields poorly, bigger shortcoming affected by environment, the compounded microbeads formed
Material character is also not sufficiently stable, and electromagnetic parameter fluctuation is relatively big, and absorbing property is not good enough, does not possess and fights in harshness
Good stability under the environment of field, can't be used widely in practice.
Seminar uses autoreaction extinguishing method to be prepared for hollow ceramic microspheres absorbing material at present, and the method is class
Topic group combines SHS technology (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, be that preparation technology of ceramic materials is combined with cenosphere, a kind of New Radar Absorbing prepared
Material, this material not only has the structure of hollow and also has the physical property that ceramic material is excellent.Can lead to
Cross the composition controlling raw material, prepare the Barium hexaferrite hollow ceramic microspheres absorbing material of the different composition of series,
Absorption to electromagnetic wave has good performance.
Summary of the invention
It is an object of the invention to provide a kind of W type Barium hexaferrite (BaZn1.4Co0.6Fe16O27) hollow ceramic is micro-
The formula of pearl absorbing material and preparation technology.
W type Barium hexaferrite (BaZn1.4Co0.6Fe16O27) formula of hollow ceramic microspheres absorbing material and content
(mass percent) is:
Wherein oxygenation agent is potassium hyperchlorate, and carburization agent is sucrose, and binding agent is epoxy resin (E51).
The present invention has a following major advantage:
(1) the hollow ceramic microspheres absorbing material prepared by the formula of the present invention is utilized, for a kind of W type barium ferrum
Oxysome (BaZn1.4Co0.6Fe16O27), there is light weight and 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 there is the advantages such as balling-up rule, balling ratio height, even particle size distribution, particle diameter is little, yield is big；
(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 3.05mm, in 2～18GHz scopes, its minimum reflectance is up to-42.55dB, corresponding frequency
For 10.91GHz, the Absorber Bandwidth less than-10dB is 2.10GHz (9.86～11.96GHz).
Detailed description of the invention
1, the preparation of reunion powder is reacted
According to the mass percent of formula, weighing total amount is the raw material of 200g, adds the anhydrous second of 200mL
Alcohol, mix homogeneously, with 1800r/min rotating speed in high speed dispersor, disperses 8h；Then 30.8g is added
Epoxy resin (E51), after stirring, pour rustless steel container (400mm × 100mm × 50mm) into
In, put in 80 DEG C of baking ovens, dry 4h；Then carbonization 4h in 160 DEG C of baking ovens；Put in pulverizer,
High speed pulverization, sieves, it is thus achieved that particle diameter is less than the reunion powder of 150 μm.
2, W type Barium hexaferrite (BaZn1.4Co0.6Fe16O27) preparation of hollow ceramic microspheres absorbing material
The preparation of this material uses autoreaction extinguishing method, and its schematic diagram prepared is shown in Figure of description 1.According to saying
Bright book accompanying drawing 1, is connected to oxygen and acetylene gas on self-propagating spray gun, opens the valve of three steel cylinders respectively,
The pressure regulating pressure, oxygen and acetylene gas is respectively not less than 0.5MPa and 0.1MPa；To reunite powder
Adding in spray gun hopper, open the gas switch on spray gun, lighting and regulate flame is neutral flame, opens down
Hopper switchs, and reunion powder, under the effect of oxygen jet negative pressure, is inhaled into spray gun, carries out self propagating high temperature conjunction
Become reaction；Flame alignment filling with the catcher of cooling water, sprays, jet length is 50cm, due to
Injection product is the molten drop thing of high temperature, when it is cooled down by rapid extinguishing when, produces owing to molten drop is internal
A large amount of gases cannot shed, and will form the structure of cavity therein, and reactive spray product is through collecting
Device settles a period of time, after filtration, puts in 80 DEG C of baking ovens and is dried, and collects granular powder, then exists
Heat treatment is carried out at 1350 DEG C.
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 Oxford INCAPENTAFET type high-performance spectroscopy systems
(EDS) the elementary composition of hollow ceramic microspheres is analyzed, pops one's head in as Li (Si), can detect and be opened by Be
The element begun, result is shown in Figure of description 3.From Figure of description 2, prepared material is spherical sky
The bead material of the heart, microballon particle diameter distribution comparison rule, smooth surface.From Figure of description 3, micro-
It is Fe, O, Ba, Zn, Co that pearl mainly comprises element, illustrates that it is W type Barium hexaferrite
(BaZn1.4Co0.6Fe16O27) mainly comprise element, be also the composition of ceramic material.
(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 BaZn mutually1.4Co0.6Fe16O27,
This material is the Barium hexaferrite of a kind of W 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 3.05mm, 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, when its thickness is 3.05mm, inhales the wave reflection rate a width of 2.10GHz of band less than-10dB
(9.86～11.96GHz), minimum reflectance is-42.55dB, and corresponding frequency is 10.91GHz, thus this
Plant W type Barium hexaferrite hollow ceramic microspheres material and there is certain absorbing property.
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 on hollow ceramic microspheres surface；Fig. 4 is the XRD figure of hollow ceramic microspheres；
Fig. 5 is the suction wave reflection rate curve chart of hollow ceramic microspheres.
Claims (4)
1. a W type Barium hexaferrite hollow ceramic microspheres absorbing material, it is characterised in that its formula and content (matter
Amount percentage ratio) be: iron powder 13.7%, zinc powder 3.5%, brium carbonate 7.6%, iron sesquioxide 29.5%, carbon
Acid cobalt 2.7%, oxygenation agent 16.9%, carburization agent 10.7%, binding agent 15.4%.
A kind of W type Barium hexaferrite hollow ceramic microspheres absorbing material the most according to claim 1, it is special
Levying and be that used oxygenation agent is potassium hyperchlorate, carburization agent is sucrose, and binding agent is epoxy resin (E51).
A kind of W type Barium hexaferrite hollow ceramic microspheres absorbing material the most according to claim 1, it is special
Levy and be that the molecular structural formula of prepared this W type Barium hexaferrite is BaZn1.4Co0.6Fe16O27。
A kind of W 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 1350 DEG C.
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Citations (4)
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|---|---|---|---|---|
| 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 |
| CN102643082A (en) * | 2012-03-05 | 2012-08-22 | 沈阳理工大学 | Preparation method of W-shaped barium ferrite |
| CN103922716A (en) * | 2013-10-29 | 2014-07-16 | 天津大学 | Zinc-doped W type barium ferrite composite wave-absorption material and preparation method thereof |
| 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 CN201510366716.8A patent/CN106316379A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102643082A (en) * | 2012-03-05 | 2012-08-22 | 沈阳理工大学 | Preparation method of W-shaped barium ferrite |
| CN103922716A (en) * | 2013-10-29 | 2014-07-16 | 天津大学 | Zinc-doped W type barium ferrite composite wave-absorption material and preparation method thereof |
| 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 (5)
| Title |
|---|
| 王潇雅等: "W型钡铁氧体的研究进展", 《宇航材料工艺》 * |
| 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》 * |
| 陈大明: "《先进陶瓷材料的注凝技术与应用》", 30 November 2011, 国防工业出版社 * |
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