CN107030286A - A kind of preparation method of porous anodized aluminum material - Google Patents
A kind of preparation method of porous anodized aluminum material Download PDFInfo
- Publication number
- CN107030286A CN107030286A CN201710310722.0A CN201710310722A CN107030286A CN 107030286 A CN107030286 A CN 107030286A CN 201710310722 A CN201710310722 A CN 201710310722A CN 107030286 A CN107030286 A CN 107030286A
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- powder
- anodized aluminum
- porous
- aluminum material
- bonding agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1121—Making porous workpieces or articles by using decomposable, meltable or sublimatable fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
A kind of preparation method of porous anodized aluminum material, comprises the following steps, 1）Rafifinal powder, rafifinal powder purity >=99.9% are prepared with gases at high pressure atomization technique, powder particle size is 1~500 μm, and atomization air pressure scope is 1~17MPa；2）Step 1）Obtained powder carries out ball milling with bonding agent in solvent medium, and the solvent can be ethanol, acetone, lipid organic solvent；3）By step 2）Secondary ball milling is carried out after obtained mixing suspension drying, obtains being mixed with the powder of bonding agent；4）By step 3）What is obtained is mixed with the powder of bonding agent by being sintered after compression molding.The voidage of the porous anodized aluminum material of the present invention is high, and the diameter in space is small, so that its effective surface area is big, therefore the capacitor electrostatic capacity made with it is high.The shape of porous aluminum can flexibly be changed as needed simultaneously, and the shape of such capacitor can be not limited to cylindrical and square.
Description
Technical field
The present invention relates to a kind of anode material of capacitor, more particularly to a kind of preparation method of porous anodized aluminum material.
Background technology
Now in the production process of capacitor, the aluminium foil of capacitor can be divided into high-voltage anode foil, low-voltage anode foil and
Anode foil；Wherein the surface area of anode foils and Cathode Foil has a great impact to the static capacity of capacitor, and present foam
The porosity of aluminium is more than or equal to 0.2mm in 50%-90%, aperture, in the production of capacitor and in use, effective table of foamed aluminium
Area does not still reach requirement.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art there is provided a kind of high and larger electrostatic of porosity
The preparation method of the porous anodized aluminum material of capacity.
In order to solve the above technical problems, technical scheme proposed by the present invention is：A kind of making side of porous anodized aluminum material
Method, comprises the following steps, and 1）Rafifinal powder, rafifinal powder purity >=99.9%, powder are prepared with gases at high pressure atomization technique
Granular size is 1~500 μm, and atomization air pressure scope is 1~17MPa, and gas and metal aluminum melt ratio are 1~10；2）Step
1）Obtained powder carries out ball milling with bonding agent in solvent medium, obtains being mixed with the powder slurries of bonding agent, the solvent can
For ethanol, acetone, lipid organic solvent；3）By step 2）Secondary ball milling is carried out after obtained mixing suspension drying, is mixed
There is the powder of bonding agent, the content of bonding agent is 0.1-10wt%；4）By step 3）The obtained powder for being mixed with bonding agent passes through
It is sintered after compression molding, sintering atmosphere is vacuum, inertia or reducing atmosphere.In the present invention, after sintering, bonding agent is warm
Decompose, the porous anodized aluminum material internal after being so molded there are many apertures in irregular shape.
The preparation method of above-mentioned porous anodized aluminum material, it is preferred that the bonding agent is to occur at a sintering temperature
The organic adhesive of thermal decomposition, including polyvinyl alcohol resin, polyester resin, epoxy resin, phenolic resin.
The preparation method of above-mentioned porous anodized aluminum material, it is preferred that the pressure of compression molding is 0.01 MPa~60
MPa, sintering temperature is 500~659 DEG C.
What is obtained after porous anodized aluminum material prepared by the preparation method of above-mentioned porous anodized aluminum material, sinter molding is more
The pore size of hole aluminium is 0.1-1000 μm, and porosity is 10-98%.
The aluminium electrolutic capacitor that a kind of above-mentioned porous anodized aluminum material is made, including be made with porous aluminum
Exit is connected with anode, the anode；The exit can be flat aluminium foil, can also be high-purity aluminum steel, described
Connected mode can be welding, can also be that exit and porous aluminum are sintered in into one among the process made in porous anodized aluminum
Rise.
Compared with prior art, the advantage of the invention is that：The voidage of the porous anodized aluminum material of the present invention is high, and
The diameter in space is small, so that its effective surface area is big, therefore the capacitor electrostatic capacity made with it is high.While porous aluminum
Shape can flexibly be changed as needed, and the shape of such capacitor can be not limited to cylindrical and square.
Embodiment
For the ease of understanding the present invention, present invention work more comprehensively, is meticulously described below in conjunction with preferred embodiment,
But protection scope of the present invention is not limited to embodiment in detail below.
It should be strongly noted that when a certain element, to be described as " be fixed on, be fixed in, be connected to or be communicated in " another
When on element, it can be directly fixed, affixed, connection or connect on another element or by connecting in the middle of other
Fitting is indirectly fixed, affixed, connection or connection are on another element.
Unless otherwise defined, the implication that all technical terms used hereinafter are generally understood that with those skilled in the art
It is identical.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to the limitation present invention
Protection domain.
Embodiment
A kind of preparation method of porous anodized aluminum material, comprises the following steps, 1）Prepared with gases at high pressure atomization technique high
Pure aluminium powder, rafifinal powder purity >=99.9%, powder particle size is 1~500 μm, and atomization air pressure scope is 1~17MPa,
Gas and metal aluminum melt ratio are 1~10；2）Step 1）Obtained powder carries out ball milling, institute with bonding agent in solvent medium
It can be ethanol, acetone, lipid organic solvent to state solvent；3）By step 2）Secondary ball is carried out after obtained mixing suspension drying
Mill, obtains being mixed with the powder of bonding agent；Bonding agent is the organic adhesive that can be thermally decomposed at a sintering temperature, such as polyethylene
Alcohol resin；4）By step 3）What is obtained is mixed with the powder of bonding agent by being sintered after compression molding, by rafifinal during shaping
Compressed together with powder in bar embedment powder, such lead-out wire is just sintered together；Sintering atmosphere be vacuum, inertia or
Reducing atmosphere.The pressure of compression molding is 50 MPa, and sintering temperature is 659 DEG C.
The pore size of the porous aluminum obtained after the present embodiment sinter molding is 0.1-200 μm, and porosity is 98%.
It is a kind of to prepare porous aluminum material with 10~20 μm of ultrapure aluminium powder inert gas sintering, patty is shaped as, cake
Thickness is 1cm, a diameter of 2cm, and the porosity of material is 50%, and the average-size of hole is 10 μm.By cake porous aluminum material and
High-purity aluminum foil strip adoption is laser welded, then by electrode material in boric acid（100g/L）In the aqueous solution in 200V, 400V and
It is melted under 500V voltages, forming current is 0.6A, then in ammonium pentaborate（80g/L）Direct capacitance measurement is carried out in the aqueous solution
Examination, it is as a result as shown in the table.
Claims (5)
1. a kind of preparation method of porous anodized aluminum material, it is characterised in that：Comprise the following steps, 1）Skill is atomized with gases at high pressure
Art prepares rafifinal powder, rafifinal powder purity >=99.9%, and powder particle size is 1~500 μm, and atomization air pressure scope is 1
~17MPa, gas and metal aluminum melt ratio are 1~10；2）Step 1）Obtained powder enters with bonding agent in solvent medium
Row ball milling, the solvent can be ethanol, acetone, lipid organic solvent；3）By step 2）Obtained mixing suspension drying is laggard
Row secondary ball milling, obtains being mixed with the powder of bonding agent；4）By step 3）The obtained powder for being mixed with bonding agent passes through compression molding
After be sintered, sintering atmosphere be vacuum, inertia or reducing atmosphere.
2. the preparation method of porous anodized aluminum material according to claim 1, it is characterised in that：The bonding agent is can be
Sintering temperature issues the organic adhesive of heat decomposition, including polyvinyl alcohol resin, polyester resin, epoxy resin, phenolic resin.
3. the preparation method of porous anodized aluminum material according to claim 1, it is characterised in that：The pressure of compression molding is
The MPa of 0.01 MPa~60, sintering temperature is 500~659 DEG C.
4. porous anodized aluminum material prepared by the preparation method of the porous anodized aluminum material according to claim any one of 1-3
Material, it is characterised in that：The pore size of the porous aluminum obtained after sinter molding is 0.1-1000 μm, and porosity is 10-98%.
5. the aluminium electrolutic capacitor that a kind of porous anodized aluminum material as claimed in claim 4 is made, it is characterised in that：Bag
Include and be connected with exit on the anode being made with porous aluminum, the anode；The exit can for flat aluminium foil,
Can be high-purity aluminum steel, the connected mode can be welding, can also will draw among the process made in porous anodized aluminum
Go out end to be sintered together with porous aluminum.
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| CN201710310722.0A CN107030286A (en) | 2017-05-05 | 2017-05-05 | A kind of preparation method of porous anodized aluminum material |
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| CN201710310722.0A CN107030286A (en) | 2017-05-05 | 2017-05-05 | A kind of preparation method of porous anodized aluminum material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257784A (en) * | 2017-12-12 | 2018-07-06 | 湖南艾华集团股份有限公司 | Solid-state aluminum electrolytic capacitor and preparation method thereof |
| CN109741950A (en) * | 2018-11-28 | 2019-05-10 | 东莞东阳光科研发有限公司 | A kind of preparation method of porous anodized aluminum material |
| CN113745006A (en) * | 2021-08-17 | 2021-12-03 | 深圳江浩电子有限公司 | Method for manufacturing organic powder mixed casting type aluminum electrode positive electrode |
| US20220375692A1 (en) * | 2018-10-04 | 2022-11-24 | Pacesetter, Inc. | Hybrid anode and electrolytic capacitor |
| CN115627076A (en) * | 2022-10-31 | 2023-01-20 | 长沙先进电子材料工业技术研究院有限公司 | Heat-conducting gel and preparation method and application thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108257784A (en) * | 2017-12-12 | 2018-07-06 | 湖南艾华集团股份有限公司 | Solid-state aluminum electrolytic capacitor and preparation method thereof |
| US20220375692A1 (en) * | 2018-10-04 | 2022-11-24 | Pacesetter, Inc. | Hybrid anode and electrolytic capacitor |
| US11935706B2 (en) * | 2018-10-04 | 2024-03-19 | Pacesetter, Inc. | Hybrid anode and electrolytic capacitor |
| CN109741950A (en) * | 2018-11-28 | 2019-05-10 | 东莞东阳光科研发有限公司 | A kind of preparation method of porous anodized aluminum material |
| CN109741950B (en) * | 2018-11-28 | 2023-04-07 | 东莞东阳光科研发有限公司 | Preparation method of porous aluminum anode material |
| CN113745006A (en) * | 2021-08-17 | 2021-12-03 | 深圳江浩电子有限公司 | Method for manufacturing organic powder mixed casting type aluminum electrode positive electrode |
| CN113745006B (en) * | 2021-08-17 | 2024-01-16 | 深圳江浩电子有限公司 | Organic powder mixed casting type aluminum electrode positive electrode manufacturing method |
| CN115627076A (en) * | 2022-10-31 | 2023-01-20 | 长沙先进电子材料工业技术研究院有限公司 | Heat-conducting gel and preparation method and application thereof |
| CN115627076B (en) * | 2022-10-31 | 2023-10-20 | 长沙先进电子材料工业技术研究院有限公司 | Heat-conducting gel and preparation method and application thereof |
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