CN1008332B - The method for making of hollow nickel fibrofelt - Google Patents
The method for making of hollow nickel fibrofeltInfo
- Publication number
- CN1008332B CN1008332B CN 87101487 CN87101487A CN1008332B CN 1008332 B CN1008332 B CN 1008332B CN 87101487 CN87101487 CN 87101487 CN 87101487 A CN87101487 A CN 87101487A CN 1008332 B CN1008332 B CN 1008332B
- Authority
- CN
- China
- Prior art keywords
- nickel
- fiber
- fibrofelt
- composite fiber
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Powder Metallurgy (AREA)
Abstract
The present invention is a kind of new method for preparing the hollow nickel fibrofelt, and its content comprises that to make diameter be several microns to tens microns nickel composite fiber technology with this fiber system hollow nickel fibrofelt.This method is to adopt NH
3-(NH
4)
2SO
4-NiSO
4-H
2O system pressurized hydrogen reduction technique prepares nickel composite fiber; Adopt organic bond bonding nickel composite fiber base, high-temperature gasification decarburization, roll (or pressure) and make, sinter into the felt technology.The hollow nickel fibrofelt of using the present invention's production has porosity and the needed thickness of 50-94%.
Description
The invention belongs to preparation metal polyporous material field.It provides a kind of new technology for preparing high porosity hollow nickel fibrofelt.
The hollow nickel fibrofelt is a kind of new type of metal porous material, it further alloying become the nickel alloy fiber felt.Nickel and alloy fiber felt thereof have special purpose in space flight, aircraft industry.They can make high, medium and low all temps and dissimilar heat pipe Guan Rui; They can make gas-turbine unit turbine radial clearance, the abradable seal in compressor blade tip space and the encapsulant at other position, thereby improve engine performance.But this class material can extraordinary compatibility between toughness, corrosion resistance and abrasivity; The high porosity nickel fibre felt can be used as electrode base board, the alkaline battery that development quality is light, specific energy is high, have extended cycle life.Especially Ni-Cd, Ni-H
2Battery is the ideal source of space technology.Can make heat insulation, acoustic material under filter, catalyst, catalyst carrier, self-lubricating bearing and the high temperature etc. in addition.
Metal polyporous material often is to form through pressing (rolling) system, sintering with metal dust.But, when making the high porosity material, can cause lower engineering properties because contact point is few between powder.In order to make high porosity metal material, developed the multiple technology of making porous material with metallic fiber in the last few years with better mechanical performance.Because the micro metal fiber system of use porous material has increased contact point between the independent element of material, thereby can improve the mechanical performance of porous material.The key point that addresses this problem is feasible on the development technique, cheap preparation metallic fiber and with the felt process of the reasonable moulding of fiber, sintering economically.
The method of producing metal composite fiber at present has (E.P.0182116A such as vacuum deposition method, ion plating method, chemical deposit method and electrodeposition process
2).Except that electrodeposition process, all be not suitable for preparing the composite fibre of containing metal more than 80% in these methods.Moreover these method technologies are complicated, the production cost height.Then require chemical fibre is carried out chemical plating (or plating carbon) earlier with electrodeposition process, make it to become conductor, and electrodeposition process also to be difficult to produce diameter be the uniform composite fibre of micron-sized coating.Therefore the production and the application of hollow metal fiber multihole material are restricted.
It is described to press the clear 61-295304A of Japan Patent, and producing porous fibre felt piece is that the compound of carbonyl nickel powder and adhesive is coated on the paper, with vibratory drilling method fibrous nickel is planted on the batch mixing coating, and drying, rolling, decarburization sintering form again.The felt of this method preparation still have a nickel powder sinter layer simultaneously usefulness be solid fibers, so porosity can not be too high; Moreover, as the various metallic fiber blankets of system, be considerable to how to obtain cheap metallic fiber with commercial scale, and the production method of the undeclared fiber of this patent.
The objective of the invention is to overcome the shortcoming that exists in the prior art, develop the new method that a kind of chemical metallurgy process prepares metallic nickel composite fibre and production hollow nickel fibrofelt.This method technology is simple, steady quality, cheap, be fit to industrial production.
For achieving the above object, the present invention is placed on NH to natural (or artificial) fiber
3-(NH
4)
2SO
4-NiSO
4-H
2In the O system, carry out the pressurized hydrogen reduction, metallic nickel is deposited on makes nickel composite fiber on the fiber, then with organic binder bond with the nickel composite fiber base that bonds, through high-temperature gasification decarburization temperature at 450-1100 ℃, to make desired thickness and porosity be that the nickel of 50-94% is sticking through rolling (pressure) again, sintering under reducing atmosphere.
Natural (or artificial) fiber is placed NH
3-(NH
4)
2SO
4-NiSO
4H
2In the O system, wherein controlling nickel ion concentration is the 10-120 grams per liter, and ammonium sulfate concentrations is the 100-200 grams per liter, [NH
3]: [Ni
++] 〉=2.0-2.2: 1,140 °-180 ℃ of temperature, hydrogen dividing potential drop 15-40 kilograms per centimeter
2, mixing speed 300-600rpm carries out hydrogen reduction, makes nickel-ammonia complex ion in the solution be reduced into metal and is deposited on the fiber.
When nickel ion concentration was too high in the system, liquid phase viscosity was excessive, was unfavorable for the uniform deposition of metallic nickel on fiber; Concentration is crossed to hang down and then can be made the process poor efficiency.Free ammonia and nickel ion form nickel ammonium complex ion, are beneficial to reduction reaction and carry out smoothly.The ammonia amount is too many, in the course of reaction, and NH
3/ Ni
++Ratio increase, the reverse side that reduces at last stop and reaction not exclusively; During as the ammonia quantity not sufficient, in the course of reaction, the system pH value descends too much, and last reduction reaction also is terminated, and reaction not exclusively.
For the reaction speed of accelerating hydrogen reduction and the uniformity of controlling dissociate nickel powder and composite fibre surface nickel dam, adopt Fe
++, Cr
++, Sn
++, Pd
++Deng nucleator (or surfactant) fiber is handled, its consumption is decided hydrogen reduction reaction is active on fiber surface, and consumption is in the 0.01-1.0% scope usually.
With nickel composite fiber and organic binder bond modulation pulping, become nickel felt base by decompression sedimentation or centrifugal settling method etc.High polymer binder can be CMC, polyvinyl alcohol, starch etc.
In order to make the pure nickel felt, the chemistry in binding agent and the composite fibre (or natural) fiber need be removed, therefore, blank needs through the high-temperature gasification decarburization, and temperature is 450-1100 ℃ of scope, time 60-240 minute.
For porosity and the thickness that reaches expection, need compacting or rolling mill practice.Felt through rolling (or compacting) crosses increases many contact points newly between the nickel fiber.Be to increase the mechanical strength of nickel fibre felt, need be at sintering under the reducing atmosphere, temperature is at 1000-1220 ℃, time 30-60 minute.Made nickel felt porosity is in the 50-94% scope.
It is the 0.5-4.0 micron that this technology can make nickel composite fiber and the preparation thickness that diameter is several microns (or tens microns), and porosity is the hollow nickel fibrofelt of 50-94%.
Embodiment:
Get 1.5 bags of chemical fibre 60 grams, use SnCl through oil removing
2The water-soluble sensitization of hydrochloric acid and with 120 milligrams of PdCl
2The ammonia spirit activation; Take by weighing nickelous sulfate 1620 grams, ammonium sulfate 900 grams,, add 910 milliliters of concentrated ammonia liquors, place pressurized reactor together, at temperature 155-160 ℃, P with 4.5 liters of dissolvings of pure water
H2The 25-30 kilograms per centimeter
2, mixing speed 450-500rpm, reaction is 35 minutes under the condition, obtains nickel composite fiber.
Nickel composite fiber for preparing and 1% CMC aqueous solution furnishing slurry, make the felt base that pre-determines area with the decompression precipitation method of falling, treat the dried decarburization in the sintering furnace that is placed on, under nitrogen atmosphere, heat 1050 ℃ of temperature, 200 minutes time.Nickel felt after the decarburization is rolled, rolls into needed thickness; Place the stove sintering of pure hydrogen atmosphere again, 1100 ℃ of temperature, 40 minutes time.Make hollow nickel fibrofelt porosity 85%, 1.0 millimeters of thickness, tensile strength 110-120 kilograms per centimeter
2
Claims (6)
1, a kind of method for making of hollow nickel fibrofelt is characterized in that: (1) with natural (or artificial) fiber at NH
3-(NH
4)
2SO
4-NiSO
4-H
2The pressurized hydrogen reduction is deposited on metallic nickel on the fiber in the O system; (2) with organic binder cemented nickel composite fiber, base, through the high-temperature gasification decarburization, temperature is at 450-1100 ℃, makes desired thickness and porosity is the nickel felt of 50-94% through rolling (pressure) again, at last sintering under reducing atmosphere.
2, method according to claim 1, it is characterized in that pressurized hydrogen reducing process condition is: nickel ion concentration 10-120 grams per liter, ammonium sulfate concentrations are the 100-200 grams per liter, [NH
3]: [Ni
++] 〉=2.0-2.2: 1, temperature 140-180 ℃, hydrogen dividing potential drop 15-40 kilograms per centimeter
2
3,, it is characterized in that the uniformity of free nickel powder of control and nickel composite fiber surface nickel dam is used Fe in order to accelerate the reaction speed of hydrogen reduction according to claim 1,2 described methods
++, Cr
++, Sn
++Or Pd
++Deng nucleator or surfactant fiber is handled, its consumption is the 0.01-1.0% of fibre weight.
4, according to claim 1,2 described methods, when it is characterized in that with high polymer binder bonding nickel composite fiber base, used organic binder bond is polyvinyl alcohol, CMC, starch etc.
5, according to claim 1,2 described methods, the temperature that it is characterized in that sintrered nickel felt under the reducing atmosphere is 1000-1220 ℃.
6, the nickel felt of method preparation according to claim 1 is characterized in that porosity is 50-90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101487 CN1008332B (en) | 1987-12-08 | 1987-12-08 | The method for making of hollow nickel fibrofelt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101487 CN1008332B (en) | 1987-12-08 | 1987-12-08 | The method for making of hollow nickel fibrofelt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1034880A CN1034880A (en) | 1989-08-23 |
| CN1008332B true CN1008332B (en) | 1990-06-13 |
Family
ID=4813467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101487 Expired CN1008332B (en) | 1987-12-08 | 1987-12-08 | The method for making of hollow nickel fibrofelt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008332B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101767205B (en) * | 2008-12-29 | 2011-06-08 | 宁波大学 | Preparation method of hollow nickel nanosphere |
| CN102433612B (en) * | 2011-10-17 | 2013-09-25 | 中国科学院山西煤炭化学研究所 | Hollow nickel oxide fiber and preparation method thereof |
| CN106544787A (en) * | 2016-12-12 | 2017-03-29 | 墨宝股份有限公司 | A kind of production technology of the non-woven new material with degradation function |
| CN108520833B (en) * | 2018-03-16 | 2019-09-17 | 江苏中天科技股份有限公司 | Porous aluminum macroscopic body and its manufacture system and method |
| CN113245684A (en) * | 2021-05-28 | 2021-08-13 | 中国石油化工股份有限公司 | Metal microfiber material and shaping method, preparation method and application thereof |
-
1987
- 1987-12-08 CN CN 87101487 patent/CN1008332B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1034880A (en) | 1989-08-23 |
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