CN110218930A - A kind of silver based contact material and preparation method with highly resistance material transfer performance - Google Patents
A kind of silver based contact material and preparation method with highly resistance material transfer performance Download PDFInfo
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- CN110218930A CN110218930A CN201910566419.6A CN201910566419A CN110218930A CN 110218930 A CN110218930 A CN 110218930A CN 201910566419 A CN201910566419 A CN 201910566419A CN 110218930 A CN110218930 A CN 110218930A
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- 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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
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- 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
- C22C32/0047—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 carbides, nitrides, borides or silicides as the main non-metallic constituents
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/027—Composite material containing carbon particles or fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
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Abstract
It is composed of the following components by mass percentage: TiB the invention discloses a kind of silver based contact material with highly resistance material transfer performance22%~8%, 0.2%~1.2% surplus of graphene is Ag, and the sum of mass percent of above-mentioned each component is 100%.The invention also discloses a kind of preparation methods of silver based contact material with highly resistance material transfer performance: will weighed Ag powder, graphene and TiB in proportion2Powder carries out mixed powder in advance, then shakes in three-dimensional and continues mixed powder on mixed powder machine, then by mixed-powder filling mold sintering to get AgTiB2- G contact material.AgTiB of the invention2- G contact material passes through in AgTiB2Graphene is introduced in contact material, significantly improves the anti-material transfer performance of contact material.
Description
Technical field
The invention belongs to low-voltage contact field of material technology, and in particular to a kind of silver-based with highly resistance material transfer performance
Contact material, the invention further relates to the preparation methods of the silver based contact material with highly resistance material transfer performance.
Background technique
Contact is the core component of various device for switching, instrument and meter, electric elements, and performance quality directly affects entirely
On-off capacity, service life and reliability of operation of electric system etc..Silver-based composite material is because having excellent conductive and heat-conductive
The advantages that property, high inoxidizability and easy processing the main material as low-voltage contact, wherein AgCdO contact material is excellent with its
Characteristic, referred to as " omnipotent contact material ".But the pollution due to cadmium to environment, is gradually produced and used by limitation.
AgSnO2Contact material has the resistance to arc erosion to compare favourably with AgCdO contact material, resistance fusion welding and the transfer of anti-material etc.
Electrical characteristic.However, AgSnO2Contact material is during being actually on active service, due to SnO2With the wetability of Ag difference, make in arc heat
The SnO of insulation is caused under2Particle generates biggish contact resistance and then leads to material surface temperature in the aggregation of contact surface
It increases, seriously affects the reliability and stability of electric appliance.Although the good TiB of electrical and thermal conductivity2The AgTiB of ceramics enhancing2Contact
Material has than AgSnO2More excellent comprehensive performance, but there are still resistance fusion weldings and anti-material metastatic under high current
The problems such as insufficient.
Summary of the invention
The object of the present invention is to provide a kind of silver based contact materials with highly resistance material transfer performance, improve existing low
The problem of the anti-material transfer performance difference of compression electrical contact material.
It is a further object to provide a kind of preparations of silver based contact material with highly resistance material transfer performance
Method.
The first technical solution of the present invention is a kind of silver-based contact material with highly resistance material transfer performance
Material, it is composed of the following components by mass percentage: TiB22%~8%, graphene 0.2%~1.2%, surplus Ag are above-mentioned each
The sum of mass percent of component is 100%.
The first technical solution of the present invention is a kind of silver based contact material with highly resistance material transfer performance
Preparation method, which is used to prepare the silver-based with highly resistance material transfer performance of the first of the invention technical solution
Contact material, specific steps are as follows:
Step 1, following material: TiB is weighed respectively according to mass percent2Powder 2%~8%, graphene 0.2%~
1.2%, surplus is Ag powder, and the sum of mass percent of above-mentioned each component is 100%；
Step 2, by weighed TiB2Powder and graphene are put into ball mill, ball milling 2h-48h, obtain just mixed powder；
Step 3, weighed Ag powder, and adition process controlling agent and dispersing agent is added in the first mixed powder into ball grinder,
Ball milling 2h-10h, obtains pre-mix powder；
Step 4, pre-mix powder is put into three-dimensional shake in mixed powder machine and is mixed powder 2h-10h again, obtain mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then by the mold for filling powder be placed in sintering furnace with
50-100 DEG C/min speed is warming up to 700 DEG C of -850 DEG C of sintering, cools to room temperature with the furnace after heat preservation, obtains AgTiB2- G contact material
The preparation of material, the silver based contact material with highly resistance material transfer performance is completed.
The characteristics of second of technical solution of the invention, also resides in,
Ratio of grinding media to material when step 2 ball milling is 10:1-40:1.
Ball mill when ball mill used in step 2 and step 3 ball milling is planetary ball mill, step 2 and step 3 ball milling
Revolving speed be 200-450rpm.
Ratio of grinding media to material when step 3 ball milling is 10:1-50:1.
When step 3 ball milling, the process control agent and dispersing agent of addition are respectively dehydrated alcohol and polyvinylpyrrolidone, just
The quality of mixed powder and Ag powder and be 100:0.1-100:0.5 with the mass ratio of dehydrated alcohol, the just quality of mixed powder and Ag powder
With with the mass ratio of polyvinylpyrrolidone be 100:0.5-100:2.
The vibration frequency that three-dimensional shakes mixed powder machine is 30-50Hz.
Sintering furnace is discharge plasma sintering furnace, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa, the soaking time of sintering
For 5-30min.
It is 72 μm that the Ag powder purity of step 1, which is greater than 99.9%, granularity, and the purity of graphene is greater than 99.9%, TiB2Powder
Purity is greater than 99.9%, granularity 50nm.
The invention has the advantages that a kind of silver based contact material with highly resistance material transfer performance of the invention, no
Only there is high anti-material transfer performance, be provided simultaneously with good anti-ablation ability and resistance fusion welding, have a wide range of application；This
The preparation method for inventing a kind of silver based contact material with highly resistance material transfer performance, by AgTiB2Draw in contact material
Enter graphene, significantly improves the anti-material transfer performance of contact material, obtain the AgTiB of excellent combination property2- G silver-based
Contact material, exploitativeness are strong.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the preparation method of the silver based contact material with highly resistance material transfer performance of the present invention；
Fig. 2 is the AgTiB of embodiment 12Cathode shape appearance figure after-G contact material arc erosion；
Fig. 3 is the AgTiB of embodiment 12Anode shape appearance figure after-G contact material arc erosion；
Fig. 4 is the Ag-4wt.%TiB for being not added with graphene2Cathode shape appearance figure after contact material arc erosion；
Fig. 5 is the Ag-4wt.%TiB for being not added with graphene2Anode shape appearance figure after contact material arc erosion；
Fig. 6 is the AgTiB of embodiment 22Cathode shape appearance figure after-G contact material arc erosion；
Fig. 7 is the AgTiB of embodiment 22Anode shape appearance figure after-G contact material arc erosion.
Specific embodiment
A kind of silver based contact material with highly resistance material transfer performance of the present invention, by mass percentage by following components group
At: TiB22%~8%, the sum of the mass percent of graphene 0.2%~1.2%, surplus Ag, above-mentioned each component is
100%.
A kind of preparation method of the silver based contact material with highly resistance material transfer performance of the present invention, the preparation method are used for
The silver based contact material with highly resistance material transfer performance of the invention is prepared, as shown in Figure 1, specific steps are as follows:
Step 1, weigh following material respectively according to mass percent: purity is greater than the TiB that 99.9%, granularity is 50nm2
Powder 2%~8%, purity be greater than 99.9% graphene 0.2%~1.2%, surplus be purity be greater than 99.9%, granularity be 72 μm
Ag powder, the sum of mass percent of above-mentioned each component be 100%；
Step 2, by weighed TiB2Powder and graphene are put into planetary ball mill, ratio of grinding media to material 10:1-40:1, ball milling
The revolving speed of machine is 200-450rpm, ball milling 2h-48h, obtains just mixed powder；
Step 3, be added weighed Ag powder in the first mixed powder into ball grinder, and adition process controlling agent dehydrated alcohol and
Polyethylene of dispersing agent pyrrolidones, the first quality of mixed powder and Ag powder and be 100:0.1-100 with the mass ratio of dehydrated alcohol:
0.5, the first quality of mixed powder and Ag powder and be 100:0.5-100:2 with the mass ratio of polyvinylpyrrolidone, ratio of grinding media to material 10:
The revolving speed of 1-50:1, ball mill are 200-450rpm, and ball milling 2h-10h obtains pre-mix powder；
Step 4, pre-mix powder is put into three-dimensional shake and is mixed powder 2-10h in mixed powder machine again, three-dimensional shakes mixed powder machine
Vibration frequency be 30-50Hz, obtain mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then by the mold for filling powder be placed in sintering furnace with
50-100 DEG C/min speed is warming up to 700 DEG C of -850 DEG C of sintering, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa, with furnace after heat preservation
It is cooled to room temperature, soaking time 5-30min obtains AgTiB2- G contact material, the silver-based with highly resistance material transfer performance
The preparation of contact material is completed.
Embodiment 1
The present embodiment provides a kind of silver based contact materials with highly resistance material transfer performance, by mass percentage by following
Group is grouped as: TiB24%, graphene 0.2%, surplus Ag, the sum of mass percent of above-mentioned each component are 100%.
The present embodiment also provides a kind of preparation method of silver based contact material with highly resistance material transfer performance, the preparation
Method is used to prepare the silver based contact material with highly resistance material transfer performance of the present embodiment, specific steps are as follows:
Step 1, weigh following material respectively according to mass percent: purity is greater than the TiB that 99.9%, granularity is 50nm2
Powder 4%, purity are greater than 99.9% graphene 0.2%, and purity is greater than the Ag powder 95.8% that 99.9%, granularity is 72 μm, i.e.,
TiB2Powder 6g, graphene 0.3g, Ag powder 133g；
Step 2, by weighed TiB2Powder and graphene are put into planetary ball mill, ratio of grinding media to material 20:1, ball mill
Revolving speed is 400rpm, ball milling 32h, obtains just mixed powder；
Step 3, be added weighed Ag powder in the first mixed powder into ball grinder, and adition process controlling agent dehydrated alcohol and
Polyethylene of dispersing agent pyrrolidones, just the quality of mixed powder and Ag powder and be 100:0.1 with the mass ratio of dehydrated alcohol, just mixes powder
The quality of end and Ag powder and be 100:0.5 with the mass ratio of polyvinylpyrrolidone, the revolving speed of ratio of grinding media to material 10:1, ball mill are
400rpm, ball milling 4h, obtains pre-mix powder；
Step 4, pre-mix powder is put into three-dimensional shake and is mixed powder 4h in mixed powder machine again, three-dimensional shakes the shake of mixed powder machine
Dynamic frequency is 35Hz, obtains mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then by the mold for filling powder be placed in sintering furnace with
100 DEG C/min speed is warming up to 750 DEG C of sintering, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa cools to room with the furnace after heat preservation
Temperature, soaking time 5min, obtains AgTiB2- G contact material, the system of the silver based contact material with highly resistance material transfer performance
It is standby to complete.
The AgTiB of the present embodiment2- G contact material and the Ag-4wt.%TiB for being not added with graphene2Contact material is compared, and is led
18.10% and 6.18% has been respectively increased in electric rate and hardness.The AgTiB of the present embodiment2- G contact material electricity in 12V/16A connects
Material shift direction is from cathode to anode after touching 5000 times, and cathode and anode pattern distinguish as shown in Figures 2 and 3, material
Opposite transfer amount is 0.9mg, is not added with the Ag-4wt.%TiB of graphene2The shape of cathode and anode under contact material the same terms
Looks distinguish as shown in Figure 4 and Figure 5, the AgTiB of the present embodiment2- G contact material and the Ag-4wt.%TiB for being not added with graphene2Touching
Head material is compared, and opposite transfer amount reduces 77.8%.
Embodiment 2
The present embodiment provides a kind of silver based contact materials with highly resistance material transfer performance, by mass percentage by following
Group is grouped as: TiB24%, graphene 0.4%, surplus Ag, the sum of mass percent of above-mentioned each component are 100%.
The present embodiment also provides a kind of preparation method of silver based contact material with highly resistance material transfer performance, the preparation
Method is used to prepare the silver based contact material with highly resistance material transfer performance of the present embodiment, specific steps are as follows:
Step 1, weigh following material respectively according to mass percent: purity is greater than the TiB that 99.9%, granularity is 50nm2
Powder 4%, purity are greater than 99.9% graphene 0.4%, and purity is greater than the Ag powder 95.6% that 99.9%, granularity is 72 μm, i.e.,
TiB2Powder 6g, graphene 0.6g, Ag powder 131g；
Step 2, by weighed TiB2Powder and graphene are put into planetary ball mill, ratio of grinding media to material 25:1, ball mill
Revolving speed is 400rpm, ball milling 32h, obtains just mixed powder；
Step 3, be added weighed Ag powder in the first mixed powder into ball grinder, and adition process controlling agent dehydrated alcohol and
Polyethylene of dispersing agent pyrrolidones, just the quality of mixed powder and Ag powder and be 100:0.2 with the mass ratio of dehydrated alcohol, just mixes powder
The quality of end and Ag powder and be 100:1 with the mass ratio of polyvinylpyrrolidone, the revolving speed of ratio of grinding media to material 15:1, ball mill are
400rpm, ball milling 6h, obtains pre-mix powder；
Step 4, pre-mix powder is put into three-dimensional shake and is mixed powder 4h in mixed powder machine again, three-dimensional shakes the shake of mixed powder machine
Dynamic frequency is 40Hz, obtains mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then by the mold for filling powder be placed in sintering furnace with
80 DEG C/min speed is warming up to 800 DEG C of sintering, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa cools to room with the furnace after heat preservation
Temperature, soaking time 7min, obtains AgTiB2- G contact material, the system of the silver based contact material with highly resistance material transfer performance
It is standby to complete.
The AgTiB of the present embodiment2- G contact material and the Ag-4wt.%TiB for being not added with graphene2Contact material is compared, and is led
11.82% and 19.86% has been respectively increased in electric rate and hardness.The AgTiB of the present embodiment2- G contact material is electric in 12V/16A
Material shift direction is from cathode to anode after contact 5000 times, and cathode and anode pattern distinguish as shown in Figure 6 and Figure 7, material
Expect that opposite transfer amount is 0.51mg, the AgTiB of the present embodiment2- G contact material and the Ag-4wt.%TiB for being not added with graphene2Touching
Head material is compared, and opposite transfer amount reduces 87.5%.
Embodiment 3
The present embodiment provides a kind of silver based contact materials with highly resistance material transfer performance, by mass percentage by following
Group is grouped as: TiB24%, graphene 0.6%, surplus Ag, the sum of mass percent of above-mentioned each component are 100%.
The present embodiment also provides a kind of preparation method of silver based contact material with highly resistance material transfer performance, the preparation
Method is used to prepare the silver based contact material with highly resistance material transfer performance of the present embodiment, specific steps are as follows:
Step 1, weigh following material respectively according to mass percent: purity is greater than the TiB that 99.9%, granularity is 50nm2
Powder, 4%, purity is greater than 99.9% graphene 0.6%, and purity is greater than the Ag powder 95.4% that 99.9%, granularity is 72 μm, i.e.,
TiB2Powder 6g, graphene 0.8g, Ag powder 129g；
Step 2, by weighed TiB2Powder and graphene are put into planetary ball mill, ratio of grinding media to material 30:1, ball mill
Revolving speed is 400rpm, and ball milling for 24 hours, obtains just mixed powder；
Step 3, be added weighed Ag powder in the first mixed powder into ball grinder, and adition process controlling agent dehydrated alcohol and
Polyethylene of dispersing agent pyrrolidones, just the quality of mixed powder and Ag powder and be 100:0.3 with the mass ratio of dehydrated alcohol, just mixes powder
The quality of end and Ag powder and be 100:1.4 with the mass ratio of polyvinylpyrrolidone, the revolving speed of ratio of grinding media to material 20:1, ball mill are
400rpm, ball milling 8h, obtains pre-mix powder；
Step 4, pre-mix powder is put into three-dimensional shake and is mixed powder 5h in mixed powder machine again, three-dimensional shakes the shake of mixed powder machine
Dynamic frequency is 40Hz, obtains mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then by the mold for filling powder be placed in sintering furnace with
70 DEG C/min speed is warming up to 800 DEG C of sintering, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa cools to room with the furnace after heat preservation
Temperature, soaking time 5min, obtains AgTiB2- G contact material, the system of the silver based contact material with highly resistance material transfer performance
It is standby to complete.
The AgTiB of the present embodiment2- G contact material and the Ag-4wt.%TiB for being not added with graphene2Contact material is compared, and is led
Electric rate reduces 0.63%, hardness and improves 24.22%.The AgTiB of the present embodiment2- G contact material electricity in 12V/16A connects
Material shift direction is from cathode to anode after touching 5000 times, and material is 1.32mg, the AgTiB of the present embodiment with respect to transfer amount2-
G contact material and the Ag-4wt.%TiB for being not added with graphene2Contact material is compared, and opposite transfer amount reduces 67.41%.
Embodiment 4
The present embodiment provides a kind of silver based contact materials with highly resistance material transfer performance, by mass percentage by following
Group is grouped as: TiB24%, graphene 0.8%, surplus Ag, the sum of mass percent of above-mentioned each component are 100%.
The present embodiment also provides a kind of preparation method of silver based contact material with highly resistance material transfer performance, the preparation
Method is used to prepare the silver based contact material with highly resistance material transfer performance of the present embodiment, specific steps are as follows:
Step 1, weigh following material respectively according to mass percent: purity is greater than the TiB that 99.9%, granularity is 50nm2
Powder 4%, purity are greater than 99.9% graphene 0.8%, and purity is greater than the Ag powder 95.2% that 99.9%, granularity is 72 μm, i.e.,
TiB2Powder 5g, graphene 1.1g, Ag powder 127g；
Step 2, by weighed TiB2Powder and graphene are put into planetary ball mill, ratio of grinding media to material 35:1, ball mill
Revolving speed is 400rpm, ball milling 32h, obtains just mixed powder；
Step 3, be added weighed Ag powder in the first mixed powder into ball grinder, and adition process controlling agent dehydrated alcohol and
Polyethylene of dispersing agent pyrrolidones, just the quality of mixed powder and Ag powder and be 100:0.4 with the mass ratio of dehydrated alcohol, just mixes powder
The quality of end and Ag powder and be 100:1.5 with the mass ratio of polyvinylpyrrolidone, the revolving speed of ratio of grinding media to material 25:1, ball mill are
400rpm, ball milling 10h, obtains pre-mix powder；
Step 4, pre-mix powder is put into three-dimensional shake and is mixed powder 5h in mixed powder machine again, three-dimensional shakes the shake of mixed powder machine
Dynamic frequency is 45Hz, obtains mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then by the mold for filling powder be placed in sintering furnace with
70 DEG C/min speed is warming up to 800 DEG C of sintering, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa cools to room with the furnace after heat preservation
Temperature, soaking time 5min, obtains AgTiB2- G contact material, the system of the silver based contact material with highly resistance material transfer performance
It is standby to complete.
The AgTiB of the present embodiment2Consistency, hardness and the conductivity of-G contact material are respectively 97.21%, 69.04HV
And 56.43%IACS, with the Ag-4wt.%TiB for being not added with graphene2Contact material is compared, the AgTiB of the present embodiment2- G contact
Materials conductive rate reduces 5.95%, and hardness improves 38.10%.The AgTiB of the present embodiment2- G contact material is in 12V/
Material shift direction is from cathode to anode after being in electrical contact 5000 times when 16A, and material is 1.6mg with respect to transfer amount, and is not added with
The Ag-4wt.%TiB of graphene2Contact material is compared, and opposite transfer amount reduces 60.5%.
Embodiment 5
The present embodiment provides a kind of silver based contact materials with highly resistance material transfer performance, by mass percentage by following
Group is grouped as: TiB27%, graphene 1.2%, surplus Ag, the sum of mass percent of above-mentioned each component are 100%.
The present embodiment also provides a kind of preparation method of silver based contact material with highly resistance material transfer performance, the preparation
Method is used to prepare the silver based contact material with highly resistance material transfer performance of the present embodiment, specific steps are as follows:
Step 1, weigh following material respectively according to mass percent: purity is greater than the TiB that 99.9%, granularity is 50nm2
Powder 7%, purity are greater than 99.9% graphene 1.2%, and purity is greater than the Ag powder 91.8% that 99.9%, granularity is 72 μm；
Step 2, by weighed TiB2Powder and graphene are put into planetary ball mill, ratio of grinding media to material 40:1, ball mill
Revolving speed is 450rpm, ball milling 36h, obtains just mixed powder；
Step 3, be added weighed Ag powder in the first mixed powder into ball grinder, and adition process controlling agent dehydrated alcohol and
Polyethylene of dispersing agent pyrrolidones, just the quality of mixed powder and Ag powder and be 100:0.5 with the mass ratio of dehydrated alcohol, just mixes powder
The quality of end and Ag powder and be 100:1.8 with the mass ratio of polyvinylpyrrolidone, the revolving speed of ratio of grinding media to material 30:1, ball mill are
450rpm, ball milling 10h, obtains pre-mix powder；
Step 4, pre-mix powder is put into three-dimensional shake and is mixed powder 7h in mixed powder machine again, three-dimensional shakes the shake of mixed powder machine
Dynamic frequency is 50Hz, obtains mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then by the mold for filling powder be placed in sintering furnace with
50 DEG C/min speed is warming up to 700 DEG C of sintering, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa cools to room with the furnace after heat preservation
Temperature, soaking time 30min, obtains AgTiB2- G contact material, the silver based contact material with highly resistance material transfer performance
Preparation is completed.
The AgTiB of the present embodiment2Consistency, hardness and the conductivity of-G contact material are respectively 96.34%, 82.10HV
And 45.92%IACS, with the Ag-4wt.%TiB for being not added with graphene2Contact material is compared, the AgTiB of the present embodiment2- G contact
Materials conductive rate reduces 23.47%, and hardness improves 64.20%.The AgTiB of the present embodiment2- G contact material is in 12V/
Material shift direction is from cathode to anode after being in electrical contact 5000 times when 16A, and material is 2.4mg with respect to transfer amount, and is not added with
The Ag-4wt.%TiB of graphene2Contact material is compared, and opposite transfer amount reduces 51.6%.
Pass through the various embodiments described above AgTiB2- G contact material and the AgTiB for being not added with graphene2Contact material is compared can
Know, a kind of silver based contact material with highly resistance material transfer performance of the invention that there is more excellent anti-material metastatic
Energy.
Claims (9)
1. a kind of silver based contact material with highly resistance material transfer performance, which is characterized in that by mass percentage by with the following group
It is grouped as: TiB22%~8%, the sum of the mass percent of graphene 0.2%~1.2%, surplus Ag, above-mentioned each component is
100%.
2. a kind of preparation method of the silver based contact material with highly resistance material transfer performance, which is characterized in that the preparation method
It is used to prepare the silver based contact material as described in claim 1 with highly resistance material transfer performance, specific steps are as follows:
Step 1, following material: TiB is weighed respectively according to mass percent2Powder 2%~8%, graphene 0.2%~1.2% are remaining
Amount is Ag powder, and the sum of mass percent of above-mentioned each component is 100%；
Step 2, by the weighed TiB2Powder and graphene are put into ball mill, ball milling 2h-48h, obtain just mixed powder；
Step 3, the weighed Ag powder, and adition process controlling agent and dispersing agent are added in the first mixed powder into ball grinder,
Ball milling 2h-10h, obtains pre-mix powder；
Step 4, the pre-mix powder is put into three-dimensional shake in mixed powder machine and is mixed powder 2h-10h again, obtain mixed-powder；
Step 5, mixed-powder is fitted into graphite jig, then the mold for filling powder is placed in sintering furnace with 50-
100 DEG C/min speed is warming up to 700 DEG C of -850 DEG C of sintering, cools to room temperature with the furnace after heat preservation, obtains AgTiB2- G contact material,
The preparation of silver based contact material with highly resistance material transfer performance is completed.
3. a kind of preparation method of silver based contact material with highly resistance material transfer performance according to claim 2,
It is characterized in that, ratio of grinding media to material when step 2 ball milling is 10:1-40:1.
4. a kind of preparation method of silver based contact material with highly resistance material transfer performance according to claim 2,
It is characterized in that, ball mill used in the step 2 and step 3 ball milling is planetary ball mill, the step 2 and step 3 ball
The revolving speed of ball mill is 200-450rpm when mill.
5. a kind of preparation method of silver based contact material with highly resistance material transfer performance according to claim 2,
It is characterized in that, ratio of grinding media to material when step 3 ball milling is 10:1-50:1.
6. a kind of preparation method of silver based contact material with highly resistance material transfer performance according to claim 2,
It is characterized in that, when step 3 ball milling, the process control agent and dispersing agent of addition are respectively dehydrated alcohol and polyvinylpyrrolidine
The quality of ketone, the just mixed powder and Ag powder and be 100:0.1-100:0.5 with the mass ratio of dehydrated alcohol, the just mixed powder
It is 100:0.5-100:2 with the quality of Ag powder and with the mass ratio of polyvinylpyrrolidone.
7. a kind of preparation method of silver based contact material with highly resistance material transfer performance according to claim 2,
It is characterized in that, the three-dimensional vibration frequency for shaking mixed powder machine is 30-50Hz.
8. a kind of preparation method of silver based contact material with highly resistance material transfer performance according to claim 2,
It is characterized in that, the sintering furnace is discharge plasma sintering furnace, and the vacuum degree in sintering furnace is greater than 1 × 10-3Pa, the heat preservation of sintering
Time is 5-30min.
9. a kind of preparation method of silver based contact material with highly resistance material transfer performance according to claim 2,
It is characterized in that, it is 72 μm that the Ag powder purity of the step 1, which is greater than 99.9%, granularity, and the purity of graphene is greater than 99.9%, TiB2
The purity of powder is greater than 99.9%, granularity 50nm.
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