CN106378448B - A kind of nickel powder silver clad surface for circuit brake material is modified - Google Patents
A kind of nickel powder silver clad surface for circuit brake material is modified Download PDFInfo
- Publication number
- CN106378448B CN106378448B CN201610833810.4A CN201610833810A CN106378448B CN 106378448 B CN106378448 B CN 106378448B CN 201610833810 A CN201610833810 A CN 201610833810A CN 106378448 B CN106378448 B CN 106378448B
- Authority
- CN
- China
- Prior art keywords
- nickel powder
- silver
- modified
- circuit brake
- cladding
- 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 - Fee Related
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Classifications
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
Abstract
The invention discloses a kind of silver-colored clad surface for conductive filler nickel powder in circuit brake material is modified; it is that silver nitrate and nickel powder are dissolved in alcohol solvent to the photoreduction under ultraviolet lamp irradiation condition to carry out silver-colored cladding to nickel powder that it, which is prepared, is significantly improved using the weatherability that the positive temperature coefficient temperature-sensitive device for circuit protection is made in silver cladding nickel powder prepared by the present invention；Present invention process is simple, can be effectively improved and improve the anti-oxidant equal physical and chemical performances of nickel powder, expand the application range of nickel powder.
Description
Technical field
The present invention relates to circuit brake technical fields, and in particular to a kind of nickel powder for circuit brake material
Silver-colored clad surface is modified.
Background technique
Fine Nickel Powder is widely used in the positive temperature coefficient temperature-sensitive device of circuit protection as conductive filler, has obvious
The advantages of reducing resistivity.But since Fine Nickel Powder has bigger specific surface area, surface defect compares, and has thermodynamics
Unstability, so that making the weatherability of positive heat-sensitive coefficients temperature-sensitive device reduces.Therefore suitable surface is carried out to Fine Nickel Powder to change
Property, such as coat cobalt, copper etc. can overcome Fine Nickel Powder oxidizable, it is easy to reunite the disadvantages of, to be effectively improved and improve fine nickel
The anti-oxidant equal physical and chemical performances of powder, expand the application range of nickel powder.
Because coating suitable silver on nickel powder surface can be improved the contact for avoiding Fine Nickel Powder with air, fine nickel is improved
The oxidation resistance of powder is added in polymer using modified Fine Nickel Powder as conductive filler, can effectively improve positive temperature
Spend the weatherability of coefficient heat-sensitive device.However so far, for yet there are no with photoreduction met hod to super fine surface silver cladding
Report.
Summary of the invention
To solve the deficiencies in the prior art, the present invention provides a kind of nickel powder silver cladding table for circuit brake material
Face is modified.
The technical scheme is that a kind of nickel powder silver clad surface for circuit brake material is modified, silver packet
Covering nickel powder is chondritic, and diameter is 200 ± 30nm；The silver cladding nickel powder is made of following steps:
(1) silver nitrate and nickel powder that molar ratio is 1:4-4:1 are completely dissolved in alcohol solvent, it is strong to stir, it is formed
Uniform suspension；
(2) by suspension in ultraviolet 1 ± 0.2min of light irradiation of 20W, solution colour becomes grey from white；
(3) solution in filtration step (2) after reaction, the sediment of generation is washed with deionized, then will separation
To sediment set 60 DEG C ± 1 DEG C heat preservation 8 ± 2 hours to get effectively improve weatherability silver cladding nickel powder.
The silver nitrate and the molar ratio of nickel powder mixing are preferably 2:4.
The nickel powder silver clad surface is modified the weatherability for improving circuit retainer material.
Beneficial effects of the present invention: Fine Nickel Powder can reduce resistivity as conductive filler, carry out surface to Fine Nickel Powder
It is modified, the oxidation resistance of the contact and Fine Nickel Powder that avoid Fine Nickel Powder with air and expansion can be improved in nickel powder coated with silver on surface
Big nickel powder application range, can effectively improve the weatherability of positive temperature coefficient temperature-sensitive device.
Detailed description of the invention
Fig. 1 is raw material nickel powder (figure A) and the silver-colored scanning electron microscope for coating nickel powder (figure B) prepared by the embodiment of the present invention 2
(SEM) as.
Fig. 2 is that the positive temperature coefficient heat sensor for circuit protection is made in silver cladding nickel powder prepared by the embodiment of the present invention 2
Part V figure.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
A kind of nickel powder silver clad surface method of modifying for circuit brake material, silver cladding nickel powder is spherical knot
Structure, diameter are 200 ± 30nm；The silver cladding nickel powder is made of following steps:
(1) silver nitrate and nickel powder that molar ratio is 1:4-4:1 are completely dissolved in alcohol solvent, it is strong to stir, it is formed
Uniform suspension；
(2) by suspension in ultraviolet 1 ± 0.2min of light irradiation of 20W, dissolving color from white becomes grey；
(3) solution in filtration step (2) after reaction, the sediment of generation is washed with deionized, then will separation
To sediment set 60 DEG C ± 1 DEG C heat preservation 8 ± 2 hours to get effectively improve weatherability silver cladding nickel powder.
The silver nitrate and the molar ratio of nickel powder mixing are preferably 2:4.
The nickel powder silver clad surface is modified the weatherability for improving circuit retainer material.
Embodiment 1
Silver nitrate and nickel powder that molar ratio is 1:4 are completely dissolved in alcohol solvent, it is strong to stir, formed and it is outstanding
Supernatant liquid；By suspension in 1 ± 0.2 min of ultraviolet light irradiation of 20 W, solution colour becomes grey from white；After filtering reaction
The sediment of generation is washed with deionized solution, and the sediment being separated to then is set 60oC±1 oCHeat preservation 8 ± 2 is small
When to get effectively improve weatherability silver cladding nickel powder.Wherein it is described silver cladding nickel powder be chondritic, diameter be 200 ±
30nm。
Embodiment 2
Silver nitrate and nickel powder that molar ratio is 2:4 are completely dissolved in alcohol solvent, it is strong to stir, formed and it is outstanding
Supernatant liquid；By suspension in 1 ± 0.2 min of ultraviolet light irradiation of 20 W, solution colour becomes grey from white；After filtering reaction
The sediment of generation is washed with deionized solution, and the sediment being separated to then is set 60oC±1 oCHeat preservation 8 ± 2 is small
When to get effectively improve weatherability silver cladding nickel powder.Wherein it is described silver cladding nickel powder be chondritic, diameter be 200 ±
30nm。
The SEM of above-mentioned gained silver cladding nickel powder coats the structure that nickel powder does not change nickel powder as shown in Figure 1, demonstrating silver,
Remain as chondritic.The positive temperature coefficient temperature-sensitive device V figure for circuit protection is made for silver cladding nickel powder by Fig. 2.As a result table
Bright, compared with pure nickel powder, the V value of positive temperature coefficient temperature-sensitive device made of the silver cladding nickel powder using photoreduction met hod preparation is obvious
It reduces, so that the weatherability tool of circuit brake is significantly improved.
Embodiment 3
Silver nitrate and nickel powder that molar ratio is 1:1 are completely dissolved in alcohol solvent, it is strong to stir, formed and it is outstanding
Supernatant liquid；By suspension in 1 ± 0.2 min of ultraviolet light irradiation of 20 W, solution colour becomes grey from white；After filtering reaction
The sediment of generation is washed with deionized solution, and the sediment being separated to then is set 60oC±1 oCHeat preservation 8 ± 2 is small
When to get effectively improve weatherability silver cladding nickel powder.Wherein it is described silver cladding nickel powder be chondritic, diameter be 200 ±
30nm。
Embodiment 4
Silver nitrate and nickel powder that molar ratio is 4:2 are completely dissolved in alcohol solvent, it is strong to stir, formed and it is outstanding
Supernatant liquid；By suspension in 1 ± 0.2 min of ultraviolet light irradiation of 20 W, solution colour becomes grey from white；After filtering reaction
The sediment of generation is washed with deionized solution, and the sediment being separated to then is set 60oC±1 oCHeat preservation 8 ± 2 is small
When to get effectively improve weatherability silver cladding nickel powder.Wherein it is described silver cladding nickel powder be chondritic, diameter be 200 ±
30nm。
Embodiment 5
Silver nitrate and nickel powder that molar ratio is 4:1 are completely dissolved in alcohol solvent, it is strong to stir, formed and it is outstanding
Supernatant liquid；By suspension in 1 ± 0.2 min of ultraviolet light irradiation of 20 W, solution colour becomes grey from white；After filtering reaction
The sediment of generation is washed with deionized solution, and the sediment being separated to then is set 60oC±1 oCHeat preservation 8 ± 2 is small
When to get effectively improve weatherability silver cladding nickel powder.Wherein it is described silver cladding nickel powder be chondritic, diameter be 200 ±
30nm。
Claims (1)
1. a kind of nickel powder silver clad surface method of modifying for circuit brake material, it is characterised in that: silver cladding nickel powder
For chondritic, diameter is 200 ± 30nm；The silver cladding nickel powder is made of following steps:
1) silver nitrate and nickel powder that molar ratio is 2:4 are completely dissolved in alcohol solvent, it is strong to stir, form uniform suspend
Liquid；
2) by suspension in ultraviolet 1 ± 0.2min of light irradiation of 20W, solution colour becomes grey from white；
3) filtration step 2) in solution after reaction, the sediment of generation is washed with deionized, it is then heavy by what is be separated to
Starch sets 60 DEG C of ± 1 DEG C of heat preservations 8 ± 2 hours to get the silver cladding nickel powder of weatherability is effectively improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833810.4A CN106378448B (en) | 2016-09-20 | 2016-09-20 | A kind of nickel powder silver clad surface for circuit brake material is modified |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833810.4A CN106378448B (en) | 2016-09-20 | 2016-09-20 | A kind of nickel powder silver clad surface for circuit brake material is modified |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106378448A CN106378448A (en) | 2017-02-08 |
| CN106378448B true CN106378448B (en) | 2019-03-19 |
Family
ID=57936704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610833810.4A Expired - Fee Related CN106378448B (en) | 2016-09-20 | 2016-09-20 | A kind of nickel powder silver clad surface for circuit brake material is modified |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106378448B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5764294B2 (en) * | 2010-01-18 | 2015-08-19 | ナミックス株式会社 | Silver-coated nickel powder and method for producing the same |
| CN102019433A (en) * | 2010-12-11 | 2011-04-20 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for preparing core-shell type organic/inorganic composite silver nano-wire |
| KR101329081B1 (en) * | 2011-04-12 | 2013-11-14 | 한국수력원자력 주식회사 | Method for manufacturing metal nanoparticle of core-shell structure having excellent oxidation stability |
| CN102505460B (en) * | 2011-09-30 | 2013-05-29 | 桂林理工大学 | Method for producing silver-carrying antibacterial sisal fibers |
| CN102672168B (en) * | 2012-01-06 | 2015-01-14 | 河南科技大学 | Preparation method for core-shell structural nickel-silver bimetallic powder |
| JP6095422B2 (en) * | 2012-04-04 | 2017-03-15 | 新日鉄住金化学株式会社 | Nickel particles and method for producing the same |
| CN103816574B (en) * | 2014-02-18 | 2016-06-29 | 吴水林 | The preparation method that a kind of surface has the medical titanium alloy of antibiotic property nanostructured |
| CN105161219B (en) * | 2015-09-28 | 2018-01-02 | 西安工程大学 | A kind of preparation method of UV photocurings silver nickel coat electrocondution slurry |
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2016
- 2016-09-20 CN CN201610833810.4A patent/CN106378448B/en not_active Expired - Fee Related
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| CN106378448A (en) | 2017-02-08 |
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