CN107249291B - Electric power scheduling automatization system electromagnetic shielding material - Google Patents
Electric power scheduling automatization system electromagnetic shielding material Download PDFInfo
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- CN107249291B CN107249291B CN201710480111.0A CN201710480111A CN107249291B CN 107249291 B CN107249291 B CN 107249291B CN 201710480111 A CN201710480111 A CN 201710480111A CN 107249291 B CN107249291 B CN 107249291B
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- foaming
- aluminium
- electromagnetic shielding
- stirring
- shielding material
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
- C22C1/083—Foaming process in molten metal other than by powder metallurgy
- C22C1/086—Gas foaming process
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
Abstract
A kind of electric power scheduling automatization system electromagnetic shielding material, it is characterised in that be made of following components in percentage by weight: tungsten carbide 0.5%-2%, lanthana 0.5%-5%, iron oxide 2%-5%, calcium oxide 1%-3%, foaming agent 0.5%-1%, germanium oxide 0.02%-0.5%, magnesia 1%-5%, surplus are aluminium.The present invention can significantly can optimize, be promoted the electromagnetic property of aluminum-based alloy material by the proportion of feed change, while by the porosity of controlling of production process foamed aluminium, aperture, can greatly improve the electromagnetic shielding performance of foamed aluminium material；Foamed aluminium material of the invention has higher electromagnetic shielding performance, can promote 500% compared to regular-type foam aluminum material highest, is particularly suitable for power system device and uses.
Description
Technical field
The present invention relates to electromagnetic shielding material art fields, and in particular to a kind of electric power scheduling automatization system electromagnetic shielding
Material.
Background technique
Basic energy resource of the electric energy as China, with the development of society, all trades and professions constantly increase the demand of electric energy.
Daily study, production, the life of people has be unable to do without electric energy, this just proposes continuity, the reliability of the supply of electric system electric energy
Requirements at the higher level are gone out.Preferably to ensure the safe and reliable without interruption of electric system electric energy, electric dispatching department is in power train
Electric power scheduling automatization system is applied in system.To make the efficiency of this system be not fully exerted, power train is preferably served
System, we have to be understood that the function of electric power scheduling automatization system, specify the application status of electric power scheduling automatization system, grasp
The development trend of electric power scheduling automatization system.
With the fast development of modern science and technology, electronics, electrical equipment come into operation more and more, to the mankind's
Production and life bring very big inconvenience.At the same time, the electromagnetic wave of various electronic equipments generate different frequency and energy fills
Denounce people's lives space, and then form a kind of novel pollution after water pollution, noise pollution, atmosphere pollution, i.e.,
Electromagnetic radiation pollution.Caused by electromagnetic radiation pollution is by being distributed electromagnetic wave in space, electromagnetic wave is a kind of mutually perpendicular
The energy wave of electric and magnetic fields mechanical periodicity.Hazards of electromagnetic radiation caused by electromagnetic wave mainly includes the negative shadow to human health
Sound, the influence to natural environment and three broad aspect of interference to electronic equipment.Therefore, electromagnetic shielding is as a kind of most common
Preventive means plays very important effect in the modern life, and has become the emphasis studied from now on.
Foamed aluminium material is a kind of porous structure being made of metallic framework and stomata, and this material relies on its unique bee
Nest shape structure keeps its surface more much greater than other shielding materials to the specular cross section of electromagnetic wave；It is complicated inside foamed aluminium
And tortuous hole channel makes it possible to and significantly reflects and reflect incident electromagnetic wave, to reach the mesh of electromagnetic shielding
's.
Electromagnetic wave absorbing material can absorb electromagnetic wave, thus is widely used in electromagnetic shielding field.Ferrite is magnetic
The important representative of absorbing material, it has the advantages that absorption is strong, frequency band is wider, matching thickness is thin and inexpensive.Although foamed aluminium
Material has electromagnetic wave shielding higher, but its shield effectiveness nevertheless suffers from certain limitation.
Summary of the invention
Technical problem to be solved by the present invention lies in providing, a kind of performance is stable, the good power dispatching automation of ratio of briquetting
System electromagnetic shielding material.
The technical problems to be solved by the invention are realized using following technical scheme:
A kind of electric power scheduling automatization system electromagnetic shielding material, is made of following components in percentage by weight:
Tungsten carbide 0.5%-2%, lanthana 0.5%-5%, iron oxide 2%-5%, calcium oxide 1%-3%, foaming agent
0.5%-1%, germanium oxide 0.02%-0.5%, magnesia 1%-5%, surplus are aluminium.
The better quality of each component is very are as follows:
Tungsten carbide 1%, lanthana 1%, iron oxide 2.5%, calcium oxide 2%, foaming agent 0.6%, germanium oxide 0.08%, oxygen
Change magnesium 3%, surplus is aluminium.
The foaming agent is TiH2。
Above-mentioned shielding material the preparation method is as follows:
(1) first tungsten carbide is heated to melting, is slow added into lanthana, it is stirring while adding, continue to stir 15- after adding
20min then cools down, and tungsten lanthanum alloy is made；
(2) aluminium ingot is heated to 550-700 DEG C, adds iron oxide, germanium oxide and magnesia, it is stirring while adding, until complete
Continue to stir 10min after portion's fusing, aluminium master alloy is made；
(3) tungsten lanthanum alloy and aluminium master alloy are put into smelting furnace together, heating fusing stirs evenly, obtains foaming alloy molten solution；
(4) foaming alloy molten solution is introduced into agitator tank, puts into foaming agent and calcium oxide, and stir agitator tank
It mixes, is blown into high-pressure liquid nitrogen or dry ice, liquid nitrogen or dry ice heat absorption vaporization from stirring pot bottom while agitating, forms pressure, from
Foaming alloy molten solution bottom is run up, due to forming blistering in foaming alloy molten solution by resistance, while in stirring action
Under, blistering is evenly distributed in foaming alloy molten solution；
(5) before starting solidification close to foaming alloy molten solution to temperature, the discharge port of stirring pot bottom is opened, stirring is completed
Foaming alloy molten solution afterwards is flowed into direct pouring molding in molding production line；
(6) foamed aluminium board of cast molding is processed, the foamed aluminium shielding material that suitable electric system needs is made.
The present invention adds the tungsten and lanthanum, ferromagnetic material of certain content in foam aluminum feedstock, makes the shielding of the material
It can be further improved.And by the porosity of special technology controlling and process foamed aluminium up to 80~85%, bubble diameter≤
6mm, steep that wall thickness 0.5mm or more, density of material 0.6g/cm3More than, foamed aluminium material produced is processed into 10mm heavy-gauge sheeting,
Through detecting, electric field shielding efficiency full frequency band reaches as high as 100db, high frequency up to 65db or more, middle low-frequency range (near 400mhz)
Section reaches as high as 90db or more (near 10Ghz), meanwhile, magnetic field shielding efficiency full frequency band is up to 70db or more；Compared to traditional
The materials such as electrical pure iron, cold-rolled steel sheet, when reaching similar shielding properties, weight only needs the 1~3% of steel, can greatly subtract
The overall weight of light electromagnetic shielding equipment.
The beneficial effects of the present invention are: the present invention can significantly can optimize by the proportion of feed change, promote aluminium
The electromagnetic property of base alloy material, while by the porosity of controlling of production process foamed aluminium, aperture, foam can be greatly improved
The electromagnetic shielding performance of aluminum material；Foamed aluminium material of the invention has higher electromagnetic shielding performance, compares regular-type foam aluminium
Material highest can promote 500%, be particularly suitable for power system device and use.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
Shielding material proportion in embodiment 1-3 is as follows:
The shielding material preparation process of embodiment 1-3 is as follows:
(1) first tungsten carbide is heated to melting, is slow added into lanthana, it is stirring while adding, continue to stir 15- after adding
20min then cools down, and tungsten lanthanum alloy is made；
(2) aluminium ingot is heated to 550-700 DEG C, adds iron oxide, germanium oxide and magnesia, it is stirring while adding, until complete
Continue to stir 10min after portion's fusing, aluminium master alloy is made；
(3) tungsten lanthanum alloy and aluminium master alloy are put into smelting furnace together, heating fusing stirs evenly, obtains foaming alloy molten solution；
(4) foaming alloy molten solution is introduced into agitator tank, puts into foaming agent and calcium oxide, and stir agitator tank
It mixes, is blown into high-pressure liquid nitrogen or dry ice, liquid nitrogen or dry ice heat absorption vaporization from stirring pot bottom while agitating, forms pressure, from
Foaming alloy molten solution bottom is run up, due to forming blistering in foaming alloy molten solution by resistance, while in stirring action
Under, blistering is evenly distributed in foaming alloy molten solution；
(5) before starting solidification close to foaming alloy molten solution to temperature, the discharge port of stirring pot bottom is opened, stirring is completed
Foaming alloy molten solution afterwards is flowed into direct pouring molding in molding production line；
(6) foamed aluminium board of cast molding is processed, the foamed aluminium shielding material that suitable electric system needs is made.
Shielding material (10mm heavy-gauge sheeting) performance that the embodiment of the present application 1-3 is obtained is as follows:
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
1. a kind of electric power scheduling automatization system electromagnetic shielding material, it is characterised in that by following components in percentage by weight system
At:
Tungsten carbide 0.5%-2%, lanthana 0.5%-5%, iron oxide 2%-5%, calcium oxide 1%-3%, foaming agent 0.5%-
1%, germanium oxide 0.02%-0.5%, magnesia 1%-5%, surplus are aluminium.
2. electric power scheduling automatization system electromagnetic shielding material according to claim 1, it is characterised in that by following heavy
The component of amount percentage is made:
Tungsten carbide 1%, lanthana 1%, iron oxide 2.5%, calcium oxide 2%, foaming agent 0.6%, germanium oxide 0.08%, magnesia
3%, surplus is aluminium.
3. electric power scheduling automatization system electromagnetic shielding material according to claim 1 or 2, which is characterized in that described
Foaming agent is TiH2。
4. a kind of preparation method of any one of claim 1-3 electromagnetic shielding material, it is characterised in that steps are as follows:
(1) first tungsten carbide is heated to melting, is slow added into lanthana, it is stirring while adding, continue to stir 15- after adding
20min then cools down, and tungsten lanthanum alloy is made；
(2) aluminium ingot is heated to 550-700 DEG C, adds iron oxide, germanium oxide and magnesia, it is stirring while adding, until all molten
Continue to stir 10min after change, aluminium master alloy is made；
(3) tungsten lanthanum alloy and aluminium master alloy are put into smelting furnace together, heating fusing stirs evenly, obtains foaming alloy molten solution；
(4) foaming alloy molten solution is introduced into agitator tank, puts into foaming agent and calcium oxide, and be stirred to agitator tank,
It is blown into high-pressure liquid nitrogen or dry ice, liquid nitrogen or dry ice heat absorption vaporization from stirring pot bottom while stirring, pressure is formed, is closed from foaming
Golden melt bottom is run up, and due to forming blistering in foaming alloy molten solution by resistance, while under stirring, is risen
Bubble is evenly distributed in foaming alloy molten solution；
(5) before foaming alloy molten solution starts solidification, the discharge port of stirring pot bottom, the foaming alloy after the completion of stirring are opened
Melt is flowed into direct pouring molding in molding production line；
(6) foamed aluminium board of cast molding is processed, the foamed aluminium shielding material that suitable electric system needs is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710480111.0A CN107249291B (en) | 2017-06-22 | 2017-06-22 | Electric power scheduling automatization system electromagnetic shielding material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710480111.0A CN107249291B (en) | 2017-06-22 | 2017-06-22 | Electric power scheduling automatization system electromagnetic shielding material |
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| CN107249291A CN107249291A (en) | 2017-10-13 |
| CN107249291B true CN107249291B (en) | 2019-02-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110213951A (en) * | 2019-05-14 | 2019-09-06 | 苏州铂韬新材料科技有限公司 | A kind of electromagnetic shielding foam and its preparation process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101184862A (en) * | 2005-05-30 | 2008-05-21 | 格里洛股份公司 | Porous metal foam body |
| CN102596564A (en) * | 2009-11-23 | 2012-07-18 | 应用纳米结构方案公司 | Ceramic composite materials containing carbon nanotube-infused fiber materials and methods for production thereof |
| CN105009225A (en) * | 2013-02-21 | 2015-10-28 | 3M创新有限公司 | Polymer composites with electromagnetic interference mitigation properties |
| CN106834819A (en) * | 2017-03-23 | 2017-06-13 | 吴明璋 | Silicate foam aluminium alloy and its preparation technology |
-
2017
- 2017-06-22 CN CN201710480111.0A patent/CN107249291B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101184862A (en) * | 2005-05-30 | 2008-05-21 | 格里洛股份公司 | Porous metal foam body |
| CN102596564A (en) * | 2009-11-23 | 2012-07-18 | 应用纳米结构方案公司 | Ceramic composite materials containing carbon nanotube-infused fiber materials and methods for production thereof |
| CN105009225A (en) * | 2013-02-21 | 2015-10-28 | 3M创新有限公司 | Polymer composites with electromagnetic interference mitigation properties |
| CN106834819A (en) * | 2017-03-23 | 2017-06-13 | 吴明璋 | Silicate foam aluminium alloy and its preparation technology |
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