CN104498763B - A kind of processing method of siller tin oxide oxide electrical contact material - Google Patents
A kind of processing method of siller tin oxide oxide electrical contact material Download PDFInfo
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- CN104498763B CN104498763B CN201410840566.5A CN201410840566A CN104498763B CN 104498763 B CN104498763 B CN 104498763B CN 201410840566 A CN201410840566 A CN 201410840566A CN 104498763 B CN104498763 B CN 104498763B
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Abstract
The processing method that the invention discloses a kind of siller tin oxide oxide electrical contact material, particularly as follows: the consumption of putty powder, oxidate powder and the silver nitrate needed for calculating according to the material mixture ratio of the siller tin oxide oxide electrical contact of required preparation, and the consumption of sodium hydroxide, weigh standby；Take silver nitrate and be made into the silver nitrate solution of 20～40wt%, be divided into two parts；Take sodium hydroxide and be made into the sodium hydroxide solution of 10～30wt%, be divided into two parts；A copy of it silver nitrate solution and a copy of it sodium hydroxide solution are formed silver oxide and oxide composite end slurry with oxidate powder；Another part of silver nitrate solution obtains silver oxide, oxide and tin oxider composite powder with above-mentioned composite powder slurry and another part of sodium hydroxide solution hybrid reaction after forming suspension with stannum oxide again；Gained composite powder is washed to neutrality, dry, roasting, obtains siller tin oxide oxide composite；This composite powder is processed through molding, sintering, hot extrusion, to be obtained final product.
Description
Technical field
The processing method that the present invention relates to a kind of siller tin oxide oxide electrical contact material, belongs to Metal Substrate multiple
Condensation material field.
Background technology
In recent years, siller tin oxide contact extensively should as the optimal replacer of poisonous silver cadmium oxide contact
It is used in various low-voltage electrical apparatus.Sliver oxidized tin contactor materials has excellent wearability, resistance fusion welding and resistance to
Arc erosion, but there is the shortcomings such as contact resistance is big, temperature rise is high in it, has had a strong impact on the electrical resistance of electrical equipment
Energy.
Discovery is studied, one or more oxidations being added with in bismuth oxide, copper oxide and Indium sesquioxide. through forefathers
The siller tin oxide electric contact material of thing not only has good wearability, resistance fusion welding and resistance to arc erosion
Property, improve the electric property of electrical equipment well.As a rule, the siller tin oxide electric contact containing additive
Preparation technology mainly have three kinds: powder mixing method, internal oxidation and Chemical coating method.Powder mixing method is to pass through machine
Tool hybrid mode mixes argentum powder, putty powder and additive powder body, is then carried out by mixed powder
Molding, sinter, a series of processing such as extruding, finally obtain the siller tin oxide electric contact containing additive.This
Method preparation technology is simple, the process-cycle is short for kind, but the problem that additive is assembled easily occurs.Internal oxidition
Method refers to by oxidation, the silver-colored ashbury metal containing addition element is prepared the silver tin oxide material containing additive, so
After be shaped, sinter, a series of processing such as extruding, finally obtain the siller tin oxide electricity containing additive and touch
Head.The shortcoming of this kind of method is easily to occur lean oxide region in material structure, affects the electrical of material
Energy.Chemical coating method refers to prepare the siller tin oxide electric contact material containing additive by chemical clading process
Material.The deficiency of this kind of method is to need to use the noxious substance to human body and bad environmental as course of reaction
Reducing agent, be unfavorable for society sustainable development.
Through prior art is retrieved, the patent of invention of Publication No. CN102389981A, disclose one
Plant the method that continuous uniform prepares silver tin oxide material.First the method is by ultrasound wave Homogenization Treatments
After stannum oxide slurry mix with silver nitrate solution, then by two together with ascorbic acid solution
Platform pump is got in reactor and is reacted, and obtains elemental silver and is compounded in equably on the surface of stannum oxide.Should
Method is not directed to the interpolation of metallic additions, is dispersed in matrix to additive of sening as an envoy to
Method.
The patent of invention of Publication No. CN1234591A, discloses a kind of synthesis method for preparing silver-tin dioxide
Contact material.Silver, silver oxide, stannum, stannum oxide, stannous sulfate and addition element are passed through by this invention
Batch mixing aftershaping, is then pressed into the pressed compact after molding silver liquation and is synthesized, more laggard through ingot casting
Siller tin oxide electric contact is processed in row extruding, wire drawing etc..But the method existence easily occurs that additive is assembled
Deficiency.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of technique is simple, additive is in matrix material point
The processing method of cloth uniform siller tin oxide oxide electrical contact material, siller tin oxide obtained by this method
Electrical contact metallographic structure is uniform, have excellent processing characteristics.
The processing method of siller tin oxide oxide electrical contact material of the present invention, comprises the following steps:
1) oxidation needed for calculating according to the material mixture ratio of the siller tin oxide oxide electrical contact of required preparation
The consumption of glass putty, oxidate powder and silver nitrate, and calculate silver nitrate and hydroxide according to the consumption of silver nitrate
Sodium reaction generates the consumption of the sodium hydroxide needed for silver oxide, weighs standby；Take silver nitrate water dissolution to join
Becoming the silver nitrate solution of 20～40wt%, be divided into two parts by the silver nitrate solution prepared, portion is silver nitrate
Solution A, another part is silver nitrate solution B；Take sodium hydroxide water dissolution and be made into the hydrogen-oxygen of 10～30wt%
Changing sodium solution, be divided into two parts by the sodium hydroxide solution prepared, portion is sodium hydroxide solution A, another
Part is sodium hydroxide solution B；Described oxidate powder is selected from anhydrous wolframic acid powder, oxidation bismuth meal, oxidation
One or more combination in copper powder and indium oxide powder；
2) oxidate powder and silver nitrate solution A are placed in reactor, stir, obtain silver nitrate and
The suspension of oxide；In this suspension, add sodium hydroxide solution A, stirring reaction, aoxidized
Silver and oxide composite end slurry；
3) putty powder and silver nitrate solution B are placed in another reactor, stir, obtain nitric acid
Silver and the suspension of stannum oxide；It is added thereto to step 2) silver oxide of gained and oxide composite end slurry
Material, adds sodium hydroxide solution B, stirring reaction, filters, obtain silver oxide, oxide and oxidation
Stannum composite powder；
4) silver oxide of gained, oxide and tin oxider composite powder are washed to neutrality, are dried, pulverize
After carry out roasting, then pulverize, obtain siller tin oxide oxide composite；
5) gained siller tin oxide oxide composite isostatic pressing, is placed in oxygen-containing atmosphere sintering the most again,
Obtain siller tin oxide oxide billet；
6) gained siller tin oxide oxide billet through hot extrusion be processed into band or wire rod, after multiple through rolling
Close or drawing, more stamped processing or rivet driver are processed, and i.e. obtain siller tin oxide oxide electrical contact material.
Silver nitrate solution and sodium hydroxide solution are respectively classified into two parts by the present invention, and a copy of it silver nitrate is molten
Liquid and a copy of it sodium hydroxide solution with as additive oxide (Tungstic anhydride. and/or bismuth oxide and
/ or copper oxide and/or Indium sesquioxide .) form silver oxide and oxide composite end slurry；Another part of silver nitrate is molten
Liquid and stannum oxide formed after suspension again with above-mentioned silver oxide and oxide composite end slurry and another part
Sodium hydroxide solution hybrid reaction obtains silver oxide, oxide and tin oxider composite powder；Due to three oxidations
Tungsten, bismuth oxide, copper oxide, (wherein the density of Tungstic anhydride. is 7.16g/cm to the density of Indium sesquioxide.3, oxygen
The density changing bismuth is 8.55g/cm3, the density of copper oxide is 6.3～6.9g/cm3, the density of Indium sesquioxide. is
7.18g/cm3) all (density is 7.143g/cm with the density reacting the silver oxide generated3) be close, thus
Silver oxide and the oxidate powder as additive can be made to mix evenly so that oxidate powder is the most equal
It is distributed in silver oxide evenly, improves the problem pockety of additive in prior art so that institute
Obtain electrical contact material and there is uniform metallographic structure；Meanwhile, the present invention use sodium hydroxide as precipitant,
The harm to human body and environment can be reduced；On the other hand, by adding oxidate powder, not only increase
The resistance fusion welding of siller tin oxide contact with resistance to arc erosion performance, and can also can effectively reduce siller tin oxide
The resistivity of contact and temperature rise, so that gained contact material has excellent electrical property.
The step 1 of said method) in, in the described siller tin oxide oxide electrical contact material needing preparation,
Stannum oxide content is 8～18wt%, and the content of oxide is 0.1～2.5wt%, and surplus is silver；More preferably
The stannum oxide content that is chosen as be 10～12wt%, the content of oxide is 0.5～1wt%, surplus be silver.
In this step, preferably silver nitrate is configured to the silver nitrate solution of 30～40wt%, more preferably preparation
Becoming the silver nitrate solution of 30～35wt%, the metallographic structure that so can make gained electrical contact material is the most equal
Even.In this step, the consumption of sodium hydroxide is usually the 4/17～5/17 of silver nitrate consumption, more preferably
4.4/17；The concentration of described sodium hydroxide solution is preferably 15～25wt%, and gained electricity so can be made to touch
The metallographic structure of head material is more uniformly distributed.When oxidate powder is anhydrous wolframic acid powder, oxidation bismuth meal, copper oxide
During two or more combination in powder and indium oxide powder, account for siller tin oxide meeting the total addition of oxidate powder
Time in the range of the 0.1～2.5wt% of oxide electrical contact material gross mass, the proportioning between them can be
Arbitrarily proportioning.In this step, described oxidate powder and putty powder all preferably employ particle mean size be 1～
The powder of 10 μm.
The step 1 of said method) in, can arbitrarily distribute when the silver nitrate solution prepared is divided into two parts,
Can also arbitrarily distribute when the sodium hydroxide solution prepared is divided into two parts, but preferably with the hydrogen of distribution
The volume of sodium hydroxide solution A is to make sodium hydroxide therein just anti-with the silver nitrate in silver nitrate solution A
Principle should be entirely.Under normal circumstances, the volume of silver nitrate solution A is silver nitrate solution cumulative volume
1/22～5/22, sodium hydroxide solution A volume is sodium hydroxide solution cumulative volume 1/22～5/22.
The step 2 of said method) in, the addition speed of described sodium hydroxide solution A be preferably 0.1～
1L/min；Described stirring reaction generally carry out under normal temperature condition, stirring react time be usually 0.3～
1h。
The step 3 of said method) in, the addition speed of described sodium hydroxide solution B be preferably 0.1～
1L/min；Described stirring reaction generally carry out under normal temperature condition, stirring react time be usually 0.3～
1h。
The step 4 of said method) in, the operation of dry, pulverizing and roasting is same as the prior art, this Shen
In please, preferably it be dried under the conditions of 100～150 DEG C until by silver oxide, oxide and stannum oxide composite powder
End is dried, it usually needs the time of 12～18h；It is typically dried silver oxide, oxide
Crossing 100～200 eye mesh screens with tin oxider composite powder after pulverizing, extracting screen underflow enters next process.Institute
The roasting stated is typically roasting 2～6h under 400～500 DEG C of temperature conditionss, then pulverizes and (at least crosses 100
Mesh sieve), obtain siller tin oxide oxide composite.
The step 5 of said method) in, described isostatic pressing and sintering operation and existing routine operation phase
With, specifically, the briquetting pressure of isostatic pressing is usually 100～150MPa；It is typically isostatic pressed
Pressed compact after molding is placed in oxygen-containing atmosphere under 880～920 DEG C of temperature conditionss sintering 4～8h, to obtain
Siller tin oxide oxide billet.
The step 6 of said method) in, described hot extrusion etc. operates all identical with existing routine operation, tool
Body ground, the temperature of hot extrusion is usually 750～900 DEG C, and extrusion ratio is 10～200.When by siller tin oxide
When band is processed in oxide billet hot extrusion, gained band through repeatedly Rolling compund, be annealed to required chi
Through punch press punching press after very little, obtain the siller tin oxide oxide electrical contact material of lamellar.When by siller tin oxide oxygen
When wire rod is processed in compound billet hot extrusion, gained wire rod is warp after repeatedly drawing and annealing to required size
Rivet driver is processed, and obtains the siller tin oxide oxide electrical contact material of rivet type.
Compared with prior art, present invention is characterized in that
1, silver nitrate solution and sodium hydroxide solution are respectively classified into two parts by the present invention, a copy of it silver nitrate
Solution and a copy of it sodium hydroxide solution and oxide (Tungstic anhydride. and/or the bismuth oxide as additive
And/or copper oxide and/or Indium sesquioxide .) form silver oxide and oxide composite end slurry；Another part of silver nitrate
Solution and stannum oxide formed after suspension again with above-mentioned silver oxide and oxide composite end slurry and another
Part sodium hydroxide solution hybrid reaction obtains silver oxide, oxide and tin oxider composite powder；Due to three oxygen
Change tungsten, bismuth oxide, copper oxide, (wherein the density of Tungstic anhydride. is 7.16g/cm to the density of Indium sesquioxide.3,
The density of bismuth oxide is 8.55g/cm3, the density of copper oxide is 6.3～6.9g/cm3, the density of Indium sesquioxide.
For 7.18g/cm3) all (density is 7.143g/cm with the density reacting the silver oxide generated3) be close, because of
And silver oxide and the oxidate powder as additive can be made to mix evenly so that oxidate powder is more
It is evenly distributed in silver oxide, improves the problem pockety of additive in prior art so that
Gained electrical contact material has uniform metallographic structure；Meanwhile, the present invention uses sodium hydroxide as precipitation
Agent, it is possible to reduce to human body and the harm of environment；On the other hand, by adding oxidate powder, not only carry
The resistance fusion welding of high siller tin oxide contact can and resistance to arc erosion performance, and can also effectively reduce silver oxygen
Change resistivity and the temperature rise of stannum contact, so that gained contact material has excellent electrical property.
2, the method for the invention technique is simple, little to human body and environmental pollution, is suitable for industrialized production.
Accompanying drawing explanation
Fig. 1 is the metallographic structure figure (200 ×) of the contact material that the embodiment of the present invention 1 prepares；
Fig. 2 is the metallographic structure figure (200 ×) of the contact material that the embodiment of the present invention 2 prepares；
Fig. 3 is the metallographic structure figure (200 ×) of the contact material that the embodiment of the present invention 3 prepares；
Fig. 4 is the metallographic structure figure (200 ×) of the contact material that the embodiment of the present invention 4 prepares.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, to be more fully understood that the present invention's
Content, but the present invention is not limited to following example.
Embodiment 1
1) it is first according to prepare 10kg Ag-SnO2(11)-WO3(1.5) material mixture ratio calculates required Tungstic anhydride.
Powder, putty powder and silver nitrate consumption, weigh anhydrous wolframic acid powder (particle mean size is 2～3 μm) 0.15kg,
Putty powder (particle mean size is 2～3 μm) 1.1kg, silver nitrate 13.773kg are standby, further according to nitric acid
Consumption weighing sodium hydroxide 3.565kg of silver, standby；Take silver nitrate water dissolution and be made into the nitric acid of 30wt%
Silver solution, is divided into two parts the silver nitrate solution prepared, and portion is silver nitrate solution A, molten for silver nitrate
The 27/175 of liquid cumulative volume, another part is silver nitrate solution B；Take sodium hydroxide water dissolution and be made into 20wt%
Sodium hydroxide solution, the sodium hydroxide solution prepared is divided into two parts, portion is sodium hydroxide solution A,
For the 27/175 of sodium hydroxide solution cumulative volume, another part is sodium hydroxide solution B；
2) anhydrous wolframic acid powder and silver nitrate solution A being placed in reactor, stir (80min), obtains
Silver nitrate and the suspension of Tungstic anhydride.；Under stirring condition, in this suspension, add sodium hydroxide solution
A (rate of addition is 0.5L/min), stirring reaction 1h, obtain silver oxide and Tungstic anhydride. composite powder slurry
Material；
3) putty powder and silver nitrate solution B being placed in another reactor, stir (100min),
Obtain the suspension of silver nitrate and stannum oxide；Under stirring condition, it is added thereto to step 2) oxidation of gained
Silver and Tungstic anhydride. composite powder slurry, add sodium hydroxide solution B (rate of addition is 0.5L/min),
Stirring reaction 1h, filters, obtains silver oxide, Tungstic anhydride. and tin oxider composite powder；
4) by the silver oxide of gained, Tungstic anhydride. and tin oxider composite powder deionized water at centrifuge dripping
Machine supernatant is washed till neutrality, dries 15h with 100 DEG C of temperature the most in an oven, then by the silver oxide dried,
Tungstic anhydride. and tin oxider composite powder are contained in bipyramid blender broken (rotating speed 25r/min, time 1h)；
Gained powder is placed in potoven with 450 DEG C of temperature calcination 4h, is placed in bipyramid blender broken after taking-up again
Broken (rotating speed 25r/min, time 1h), crosses 200 mesh sieves, obtains siller tin oxide tungsten oxide composite powder；
5) gained siller tin oxide tungsten oxide composite powder molding on isostatic pressing machine (briquetting pressure is 150MPa),
And the pressed compact after molding is placed in air with 880 DEG C of temperature sintering 4h, obtain siller tin oxide tungsten oxide base
Ingot；
6) wire rod is processed in the billet hot extrusion of gained siller tin oxide tungsten oxide, and extrusion temperature is 850 DEG C,
Mold preheating temperature is 150 DEG C, and extrusion ratio is 190；Gained wire rod through repeatedly drawing and annealing to required
It is processed into rivet type siller tin oxide tungsten oxide (Ag-SnO with rivet driver after the size wanted2(11)-WO3(1.5))
Contact.
Gained contact material is carried out metallographic structure analysis, as it is shown in figure 1, present techniques as seen from the figure
The metallographic structure of contact product prepared by scheme is uniform, and tiny stannum oxide and tungsten oxide particles divide equably
Cloth is in silver matrix.
Embodiment 2
1) it is first according to prepare 10kg Ag-SnO2(11)-Bi2O3(1.5)-CuO (1.0) material mixture ratio calculates institute
Aerobicization bismuth meal, cupric oxide powder, putty powder and silver nitrate consumption, (particle mean size is to weigh oxidation bismuth meal
2～3 μm) 0.15kg, cupric oxide powder (particle mean size is 2～3 μm) 0.1kg, putty powder (average particle
Degree is 2～3 μm) 1.1kg, silver nitrate 13.616kg be standby, and the consumption further according to silver nitrate weighs hydrogen
Sodium oxide 3.524kg, standby；Take silver nitrate water dissolution and be made into the silver nitrate solution of 40wt%, will prepare
Silver nitrate solution be divided into two parts, portion is silver nitrate solution A, for silver nitrate solution cumulative volume
25/173, another part is silver nitrate solution B；Take sodium hydroxide water dissolution and be made into the sodium hydroxide of 30wt%
Solution, is divided into two parts the sodium hydroxide solution prepared, and portion is sodium hydroxide solution A, for hydroxide
The 25/173 of sodium solution cumulative volume, another part is sodium hydroxide solution B；
2) oxidation bismuth meal, cupric oxide powder and silver nitrate solution A are placed in reactor, stir
(100min) suspension of silver nitrate, bismuth oxide and copper oxide, is obtained；Under stirring condition, to this suspension
Liquid adds sodium hydroxide solution A (rate of addition is 0.3L/min), stirring reaction 0.5h, is aoxidized
Silver, bismuth oxide and copper oxide composite powder slurry；
3) putty powder and silver nitrate solution B being placed in another reactor, stir (120min),
Obtain the suspension of silver nitrate and stannum oxide；Under stirring condition, it is added thereto to step 2) oxidation of gained
Silver, bismuth oxide and copper oxide composite powder slurry, (rate of addition is to add sodium hydroxide solution B
0.1L/min), stirring reaction 0.8h, filters, obtains silver oxide, bismuth oxide, copper oxide and stannum oxide
Composite powder；
4) by the silver oxide of gained, bismuth oxide, copper oxide and tin oxider composite powder deionized water from
Heart drier supernatant is washed till neutrality, dries 12h with 150 DEG C of temperature the most in an oven, then by drying
Silver oxide, bismuth oxide, copper oxide and tin oxider composite powder are contained in bipyramid blender broken (rotating speed
25r/min, time 1h)；Gained powder is placed in potoven with 500 DEG C of temperature calcination 6h, after taking-up again
It is placed in bipyramid blender broken (rotating speed 25r/min, time 1h), crosses 200 mesh sieves, obtain silver oxidation
Stannum bismuth oxide copper oxide composite powder；
5) (briquetting pressure is the molding on isostatic pressing machine of gained siller tin oxide bismuth oxide copper oxide composite powder
120MPa), and the pressed compact after molding is placed in air with 920 DEG C of temperature sintering 5h, obtains siller tin oxide
Bismuth oxide copper oxide billet；
6) band is processed in the billet hot extrusion of gained siller tin oxide bismuth oxide copper oxide, and extrusion temperature is 850
DEG C, mold preheating temperature is 150 DEG C, and extrusion ratio is 160；Gained band through Rolling compund, be annealed to
It is processed into the siller tin oxide bismuth oxide copper oxide of lamellar with punch press punching press after required size
(Ag-SnO2(11)-Bi2O3(1.5)-CuO (1.0)) contact.
Gained contact material is carried out metallographic structure analysis, as in figure 2 it is shown, present techniques as seen from the figure
The metallographic structure of contact product prepared by scheme is uniform, tiny stannum oxide, bismuth oxide and copper oxide particle
It is evenly distributed in silver matrix.
Embodiment 3
1) it is first according to prepare 10kg Ag-SnO2(11)-In2O3(1.0) material mixture ratio calculates required Indium sesquioxide.
Powder, putty powder and silver nitrate consumption, weigh indium oxide powder (particle mean size is 2～3 μm) 0.1kg, oxygen
Change glass putty (particle mean size is 2～3 μm) 1.1kg, silver nitrate 13.852kg standby, further according to silver nitrate
Consumption weighing sodium hydroxide 3.585kg, standby；Take silver nitrate water dissolution and be made into the silver nitrate of 30wt%
Solution, is divided into two parts the silver nitrate solution prepared, and portion is silver nitrate solution A, for silver nitrate solution
The 9/88 of cumulative volume, another part is silver nitrate solution B；Take sodium hydroxide water dissolution and be made into 20wt%'s
Sodium hydroxide solution, is divided into two parts the sodium hydroxide solution prepared, and portion is sodium hydroxide solution A,
For the 9/88 of sodium hydroxide solution cumulative volume, another part is sodium hydroxide solution B；
2) indium oxide powder and silver nitrate solution A being placed in reactor, stir (80min), obtains nitre
Acid silver and the suspension of Indium sesquioxide.；Under stirring condition, in this suspension, add sodium hydroxide solution A (drip
Acceleration is 0.5L/min), stirring reaction 1h, obtain silver oxide and Indium sesquioxide. composite powder slurry；
3) putty powder and silver nitrate solution B being placed in another reactor, stir (100min),
Obtain the suspension of silver nitrate and stannum oxide；Under stirring condition, it is added thereto to step 2) oxidation of gained
Silver and Indium sesquioxide. composite powder slurry, add sodium hydroxide solution B (rate of addition is 0.5L/min),
Stirring reaction 1h, filters, obtains silver oxide, Indium sesquioxide. and tin oxider composite powder；
4) by the silver oxide of gained, Indium sesquioxide. and tin oxider composite powder deionized water at centrifugal swing dryer
Supernatant is washed till neutrality, dries 15h with 100 DEG C of temperature the most in an oven, then by the silver oxide dried,
Indium sesquioxide. and tin oxider composite powder are contained in bipyramid blender broken (rotating speed 25r/min, time 1h)；
Gained powder is placed in potoven with 450 DEG C of temperature calcination 4h, is placed in bipyramid blender broken after taking-up again
Broken (rotating speed 25r/min, time 1h), crosses 200 mesh sieves, obtains silver-tin oxide or indium oxide composite powder；
5) gained silver-tin oxide or indium oxide composite powder molding on isostatic pressing machine (briquetting pressure is 150MPa),
And the pressed compact after molding is placed in air with 880 DEG C of temperature sintering 4h, obtain silver-tin oxide or indium oxide base
Ingot；
6) wire rod is processed in the hot extrusion of gained silver-tin oxide or indium oxide billet, and extrusion temperature is 850 DEG C,
Mold preheating temperature is 150 DEG C, and extrusion ratio is 190；Gained wire rod through repeatedly drawing and annealing to required
It is processed into rivet type silver-tin oxide or indium oxide (Ag-SnO with rivet driver after the size wanted2(11)-In2O3(1.0))
Contact.
Gained contact material is carried out metallographic structure analysis, as it is shown on figure 3, present techniques as seen from the figure
The metallographic structure of contact product prepared by scheme is uniform, and tiny stannum oxide and indium oxide particles divide equably
Cloth is in silver matrix.
Embodiment 4
1) it is first according to prepare 10kg Ag-SnO2(11)-In2O3(0.5)-Bi2O3(0.5)-CuO (0.5) material
Proportioning calculates required indium oxide powder, oxidation bismuth meal, cupric oxide powder, putty powder and silver nitrate consumption, claims
Take indium oxide powder (particle mean size is 2～3 μm) 0.05kg, (particle mean size is 2～3 μ to oxidation bismuth meal
M) 0.05kg, cupric oxide powder (particle mean size is 2～3 μm) 0.05kg, putty powder (particle mean size be 2～
3 μm) 1.1kg, silver nitrate 13.773kg be standby, further according to the consumption weighing sodium hydroxide of silver nitrate
3.565kg, standby；Take silver nitrate water dissolution and be made into the silver nitrate solution of 40wt%, the nitric acid that will prepare
Silver solution is divided into two parts, and portion is silver nitrate solution A, for the 1/7 of silver nitrate solution cumulative volume, and another part
For silver nitrate solution B；Take sodium hydroxide water dissolution and be made into the sodium hydroxide solution of 30wt%, by prepare
Sodium hydroxide solution is divided into two parts, and portion is sodium hydroxide solution A, for sodium hydroxide solution cumulative volume
1/7, another part is sodium hydroxide solution B；
2) indium oxide powder, oxidation bismuth meal, cupric oxide powder and silver nitrate solution A are placed in reactor, stir
Mix uniformly (100min), obtain the suspension of silver nitrate, Indium sesquioxide., bismuth oxide and copper oxide；Stirring bar
Under part, in this suspension, add sodium hydroxide solution A (rate of addition is 0.3L/min), stirring reaction
0.5h, obtains silver oxide, Indium sesquioxide., bismuth oxide and copper oxide composite powder slurry；
3) putty powder and silver nitrate solution B being placed in another reactor, stir (120min),
Obtain the suspension of silver nitrate and stannum oxide；Under stirring condition, it is added thereto to step 2) oxidation of gained
Silver, Indium sesquioxide., bismuth oxide and copper oxide composite powder slurry, add sodium hydroxide solution B (dropping speed
Degree is 0.1L/min), stirring reaction 0.8h, filters, obtains silver oxide, Indium sesquioxide., bismuth oxide, oxygen
Change copper and tin oxider composite powder；
4) silver oxide of gained, Indium sesquioxide., bismuth oxide, copper oxide and tin oxider composite powder are spent from
Sub-water is washed till neutrality at centrifugal swing dryer supernatant, dries 12h with 150 DEG C of temperature the most in an oven, then
The silver oxide of drying, Indium sesquioxide., bismuth oxide, copper oxide and tin oxider composite powder are contained in bipyramid batch mixing
In device broken (rotating speed 25r/min, time 1h)；Gained powder is placed in potoven with 500 DEG C of temperature roastings
Burn 6h, after taking-up, be placed in bipyramid blender broken (rotating speed 25r/min, time 1h) again, cross 200 mesh
Sieve, obtains silver-tin oxide or indium oxide bismuth oxide copper oxide composite powder；
5) gained silver-tin oxide or indium oxide bismuth oxide copper oxide composite powder molding on isostatic pressing machine (molding pressure
Power is 120MPa), and the pressed compact after molding is placed in air with 920 DEG C of temperature sintering 5h, obtain silver
Tin oxide or indium oxide bismuth oxide copper oxide billet；
6) band, hot extrusion temperature are processed in the billet hot extrusion of gained silver-tin oxide or indium oxide bismuth oxide copper oxide
Degree is 850 DEG C, and mold preheating temperature is 150 DEG C, and extrusion ratio is 160；Gained band through Rolling compund,
It is processed into the silver-tin oxide or indium oxide bismuth oxide oxidation of lamellar with punch press punching press after being annealed to required size
Copper (Ag-SnO2(11)-In2O3(0.5)-Bi2O3(0.5)-CuO (0.5)) contact.
Gained contact material is carried out metallographic structure analysis, as shown in Figure 4, present techniques as seen from the figure
The metallographic structure of contact product prepared by scheme is uniform, tiny stannum oxide, Indium sesquioxide., bismuth oxide and oxygen
Change copper granule to be evenly distributed in silver matrix.
The contact material that embodiment 1 prepares is carried out performance detection, and mixes powder-extruding legal system with existing routine
The contact product of siller tin oxide adding tungsten oxide compare, result the most following Tables 1 and 2 institute
Show:
Table 1 embodiment 1 and existing routine mix wire product performance prepared by powder-squeezing and pressing method
Table 2 embodiment 1 and existing routine mix the electric life of rivet type contact prepared by powder-squeezing and pressing method
From Tables 1 and 2, the performance of sliver oxidized tin contactor materials prepared by technical scheme is excellent
Powder-squeezing and pressing method sliver oxidized tin contactor materials performance is mixed in existing routine.
Claims (5)
1. the processing method of a siller tin oxide oxide electrical contact material, it is characterised in that include with
Lower step:
1) needed for calculating according to the material mixture ratio of the siller tin oxide oxide electrical contact of required preparation
The consumption of putty powder, oxidate powder and silver nitrate, and according to the consumption of silver nitrate calculate silver nitrate and
Sodium hydroxide reaction generates the consumption of the sodium hydroxide needed for silver oxide, weighs standby；Take silver nitrate to use
Water dissolution is made into the silver nitrate solution of 20～40wt%, is divided into two parts by the silver nitrate solution prepared, one
Part is silver nitrate solution A, and another part is silver nitrate solution B；Take sodium hydroxide water dissolution be made into 10～
The sodium hydroxide solution of 30wt%, is divided into two parts the sodium hydroxide solution prepared, and portion is hydroxide
Sodium solution A, another part is sodium hydroxide solution B；Described oxidate powder be selected from anhydrous wolframic acid powder,
One or more combination in oxidation bismuth meal, cupric oxide powder and indium oxide powder；
2) oxidate powder and silver nitrate solution A are placed in reactor, stir, obtain silver nitrate
Suspension with oxide；In this suspension, add sodium hydroxide solution A, stirring reaction, obtain
Silver oxide and oxide composite end slurry；
3) putty powder and silver nitrate solution B are placed in another reactor, stir, obtain nitre
Acid silver and the suspension of stannum oxide；It is added thereto to step 2) silver oxide of gained and oxide composite
End slurry, adds sodium hydroxide solution B, stirring reaction, filters, obtain silver oxide, oxide
And tin oxider composite powder；
4) silver oxide of gained, oxide and tin oxider composite powder are washed to neutrality, dry, powder
Carry out roasting after broken, then pulverize, obtain siller tin oxide oxide composite；
5) gained siller tin oxide oxide composite isostatic pressing, is placed in oxygen-containing atmosphere burning the most again
Knot, obtains siller tin oxide oxide billet；
6) gained siller tin oxide oxide billet through hot extrusion be processed into band or wire rod, after through rolling
It is combined or drawing, more stamped processing or rivet driver are processed, and i.e. obtain siller tin oxide oxide electrical contact
Material.
Processing method the most according to claim 1, it is characterised in that: step 1) in, need
In the siller tin oxide electric contact material of preparation, stannum oxide content is 8～18wt%, and the content of oxide is
0.1～2.5wt%, surplus is silver.
Processing method the most according to claim 1, it is characterised in that: step 1) in, described
The volume of sodium hydroxide solution A be make sodium hydroxide therein just with the nitric acid in silver nitrate solution A
Silver reaction is completely.
Processing method the most according to claim 1, it is characterised in that: step 1) in, take nitre
Acid silver water dissolution is made into the silver nitrate solution of 30～40wt%.
Processing method the most according to claim 1, it is characterised in that: step 1) in, hydrogen-oxygen
The concentration changing sodium solution is 15～25wt%.
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Effective date of registration: 20180111 Address after: 541004 the Guangxi Zhuang Autonomous Region Dongcheng Qixing District, Guilin City Road No. 8 Patentee after: Guilin Jinge Electrotechnical Electronic Material Science & Technology Co., Ltd. Address before: 541004 the Guangxi Zhuang Autonomous Region Dongcheng Qixing District, Guilin City Road No. 8 Patentee before: Guilin Electrical Equipment Scientific Research Institute Co., Ltd. |