CN102864365A - Composite silver stannic oxide electric contact material and preparation method thereof - Google Patents
Composite silver stannic oxide electric contact material and preparation method thereof Download PDFInfo
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- CN102864365A CN102864365A CN2012103353769A CN201210335376A CN102864365A CN 102864365 A CN102864365 A CN 102864365A CN 2012103353769 A CN2012103353769 A CN 2012103353769A CN 201210335376 A CN201210335376 A CN 201210335376A CN 102864365 A CN102864365 A CN 102864365A
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Abstract
The invention provides a preparation method for composite silver stannic oxide electric contact material, which comprises the following steps of: mixing SnO2 with additive, calcining at high temperature, carrying out wet grinding, drying, smelting at the intermediate frequency, and mixing to obtain a finished product. The method has a short production flow and high yield rate, and the preparation cost is effectively lowered. Meanwhile, the phenomenon that the machining property of the material is affected by material hardening brought by high-temperature and high-pressure oxidation and multi-time extrusion and rolling can be avoided, and therefore stannic oxide powder can be evenly distributed in a silver matrix. In addition, a preparation process is environment friendly, and the material cost is relatively low due to the fact that no rare metal indium is added.
Description
Technical field
The present invention relates to a kind of metal alloy compositions preparation method, particularly a kind of composite silver silver-tin oxide electric contact material preparation method extremely
Background technology
Electrical contact is the leading contact material that is widely used in the device for switching such as rly., contactor, temperature controller, on-load switch, Low Voltage Circuit Breaker and household electrical appliance, car electrics.Device for switching is widely used in the voltage/current in disjunction/closed circuit, and its reliability directly affects the reliability service of whole system.Be widely used at present the AgCdO contact material, this material has excellent over-all properties, but because Cadmium toxicity, owing to the development of low-voltage apparatus to miniaturization, long lifetime, high reliability direction, the AgCdO material also exposes the shortcomings such as resistance fusion welding is poor, arc erosion is serious simultaneously.Silver tin oxide material is a kind of environment-friendly type contact material that developed recently gets up, and its resistance fusion welding, the excellent performance of anti-the arc erosion are hopeful all to replace poisonous AgCdO material most in silver-based electric contact material.Therefore each main contact material manufacturer of the world has carried out extensive and deep research to the preparation method of siller tin oxide contact material.
The method that prepare at present tin-oxygen-silver electric contact material mainly contains three kinds: I-powder mixing method: this method be with silver powder and putty powder in mixing the powder machine by mechanically mixing after again the method by powder metallurgy prepare siller tin oxide wire rod or sheet material.Such as US Patent No. 5798468, German patent DE 19503182.2.Because the restriction of mixed powder equipment, this method can only be produced the stannic oxide particle diameter greater than the silver tin oxide material more than 3 microns, putty powder to the 1-3 micron grain size, need supporting preparation super fine silver powder, thereby production cost is significantly promoted, and to the putty powder below 1 micron, can not satisfy inhomogeneity requirement fully with powder mixing method.II-internal oxidation: this method is that the method for silver-colored tin alloy (containing additive) by melting is prepared into the wire rod of silver-colored tin alloy or is atomized into powder, then in high-pressure oxidation atmosphere in oxidation, make tin and add elemental oxygen to change into oxide particle.Such as Japanese Patent JP19860174388, Chinese patent CN200610020688.This method has the following disadvantages: (1) production cycle is long, and only oxidation just needs consuming time more than 120 hours (general silver-cadmium alloy oxidization time only be 24 hours less than), and whole process needs a 20-25 consuming time working days, and manufacturing cost and fund cost increase greatly; (2) preparation section is long, and final lumber recovery is low; (3) in order to guarantee that tin element is oxidized to stannic oxide, need to add rare strategy metal indium, so that material cost further improves.III-Chemical coating method: this method prepares first stannic oxide powder, then in silver nitrate solution, putty powder is disperseed and adding hydrazine hydrate reductive agent, make deposition of silver in the stannic oxide powder surface, thereby prepare compound siller tin oxide powder, method by powder metallurgy prepares siller tin oxide wire rod or sheet material again, such as Chinese patent CN03113533.Pattern when this method is separated out for the reduction of assurance argent needs to add ammoniacal liquor and carry out complexing to silver ions to guarantee inhomogeneity requirement, brings very large pressure for the water treatment of follow-up meet the requirement of environmental protection.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or provides at least a kind of useful commerce to select.
The present invention be intended to solve the prior art problem one of at least.For this reason, one aspect of the present invention provides a kind of composite silver silver-tin oxide electric contact material, SnO in the material
2Weight percentage be 5-15%, surplus is silver, wherein also contains additive in this material, comprises a kind or 2 kinds of element oxides in copper, tungsten, bismuth, indium, antimony, the tellurium, it adds up to weight to account for the 0.1%-3% of gross weight.This composite silver silver-tin oxide electric contact material can effectively improve the electrical property of existing tin-oxygen-silver electric contact material.
According to embodiments of the invention, described additive can also be CuO, WO
3, Bi
2O
3, In
2O
3, Sb
2O
3, TeO
2In one or several.
The present invention provides a kind of preparation method of composite silver silver-tin oxide electric contact material on the other hand, may further comprise the steps:
SnO
2Mix with additive: additive is mixed in ball grinder with tin-containing material with the form of oxide compound, perhaps tin-containing material is joined in the aqueous solution of nitrate of additive, add again ammoniacal liquor and form precipitation;
High-temperature calcination: throw out is implemented high-temperature calcination, and calcining temperature is 100 ℃ of calcinings 0.5～2 hour, calcines 0.5～1.5 hour for 500-600 ℃, calcines 2～5 hours for 950～1100 ℃;
Wet-milling oven dry: burnt throw out is carried out stirring ball-milling process in the wet type agitating ball mill, select mill to be situated between to be 1～5 millimeter ZrO
2Ball, ball powder ratio 2～5:1 stirs time consuming 1～5 hour, and the slurry weight percentage concentration is 20～50%, carries out vacuum drying again;
Intermediate frequency (IF) smelting: ag material has been joined melting in hyperacoustic container, smelting temperature more than silver point 300～500 ℃;
Mix: in the ag material of melting, add the SnO after wet-milling is dried
2Powder stirred 30-50 minute, solidified ingot casting;
Finished product: with the ingot casting surface working, 840～920 ℃ of extruding, extrusion ratio 100～260 is made finished product again.
According to embodiments of the invention, described SnO
2The mode of mixing with additive can adopt tin-containing material and the common melting of additive, adds concentrated nitric acid oxidation, adds ammoniacal liquor again and forms throw out, and throw out is filtered.
According to embodiments of the invention, described tin-containing material is tin slab or putty powder, and wherein putty powder is selected from the putty powder that particle size range is the 1-5 micron.Greater than the easily sedimentation in silver-colored liquation of 5 microns stannic oxide, be suspended in easily silver-colored liquation top less than 1 micron stannic oxide and cause materials microstructure inhomogeneous.
According to embodiments of the invention, described additive is CuO, WO
3, Bi
2O
3, In
2O
3, Sb
2O
3, TeO
2In one or several, weight percentage is at 0.1%-3%.Can be used for improving the siller tin oxide electrical property.
According to embodiments of the invention, wherein additive can add when the preparation stannic oxide powder, also can add the treatment stage of the siller tin oxide composite powder.
According to embodiments of the invention, described wet type agitating ball mill liner polycarbonate.
According to embodiments of the invention, the SnO after the described wet-milling oven dry
2Powder choose particle size range answer powder diameter less than 1 micron particle volume per-cent more than 90%, should be less than 5% greater than the volume percent of 3 microns particles.
According to embodiments of the invention, described ag material is selected from atomizing silver powder or electrolytic silver powder or chemical silver powder.
According to embodiments of the invention, hyperacoustic container is housed in the described mixing step ultrasonic stirring device can be placed the melting container bottom, container can be the intermediate frequency crucible.Preferably, described hyperacoustic frequency is 20KHz.
According to embodiments of the invention, stir after 30-50 minute in the described mixing step, stop stirrer; Keep the input of Medium frequency induction power, open ultrasonic vibration system, frequency is adjusted into 20KHz, continue 30 minutes; Stop Medium frequency induction, keep ultrasonic vibration, make siller tin oxide liquation cooling ingot casting;
According to embodiments of the invention, the SnO after the wet-milling oven dry
2Powder incorporates begin behind the silver-colored liquation to stir fully, to prevent powder agglomeration, stirs and is mechanical stirring.
According to embodiments of the invention, the method for described ingot casting surface working includes but not limited to all method of surface finish well-known to those skilled in the art, can remove the impurity pore, makes the spindle size be fit to the container size.
According to embodiments of the invention, material can wire drawing be prepared into linear material after the described extruding, perhaps is squeezed into sheet material, is prepared into articles of sheet material behind rolling blanking.
The present invention aims to provide a kind of brand-new method for preparing the composite silver silver-tin oxide electric contact material, and this technology of preparing Production Flow Chart is short, and lumber recovery is high, effectively reduces preparation cost; This technology of preparing avoided the High Temperature High Pressure oxidation and repeatedly the hardened material that brings of extrusion rolling the material mechanical processing characteristics affected, make putty powder can be evenly distributed in the silver matrix, and preparation process is environmental protection, owing to do not add the rare metal indium, material cost is also relatively cheap.
1) compare with powder mixing method, the present invention can prepare SnO
2The powder footpath also can guarantee SnO at the tin-oxygen-silver electric contact material of 1-5 micron
2The even distribution of powder in silver matrix.Suitable SnO
2The assurance of Powder Particle Size good electrical property and the processing characteristics of tin-oxygen-silver electric contact material of producing;
2) compare with the alloy inner oxidation method, the present invention is with short production cycle, and operation is few, and need not add the rare metal indium, effectively reduces production cost;
3) compare with electroless plating method, all round process environmental protection of the present invention does not produce waste water, waste gas;
Use the present invention to have following good result:
The present invention is except SnO
2Outside the pretreatment process of powder, every batch of production cycle is 3～4 days only, has significantly improved the velocity of money of production process, does not use noble metal to make additive simultaneously, therefore, has significantly reduced production cost; The SnO that the present invention uses
2Powder is after pre-treatment, and useful additive is solid-solubilized in SnO
2In the powder rather than in the silver matrix, improved well SnO
2Therefore the wettability of powder and silver can guarantee SnO
2The even distribution of powder in silver matrix, the while can guarantee the electrical property of low-voltage apparatus; The siller tin oxide powder of the present invention's preparation has good processing forming, is processed into easily wire rod, sheet material, does not ftracture when wire rod is processed into rivet simultaneously, has significantly improved yield rate; The equal environmental protection of full scale production process of the present invention does not produce harmful three wastes.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Embodiment
Below in conjunction with embodiment embodiment of the present invention are described in detail, but it will be understood to those of skill in the art that the following example only is used for explanation the present invention, and should not be considered as limiting scope of the present invention.
Embodiment 1
Take by weighing 5 kilograms of SnO
2Powder adds 0.3 kilogram of Bi
2O
3Powder, ball milling and mixed mixed SnO 30 minutes in planetary ball mill
2Powder is calcined in the high-temperature calcination stove, and 100 ℃ of insulations 0.5 hour, 520 ℃ were incubated 0.5 hour during calcining, and 1100 ℃ are incubated 2 hours.SnO after the calcining
2Powder wet-milling 2 hours in agitating ball mill, SnO during wet-milling
2The ratio of powder and water is 0.5, and ball powder ratio is 3.0.SnO after the wet-milling
2Powder detects SnO with laser particle analyzer
2The granularity of powder guarantees D50 at 0.5～0.8 micron, less than 1 micron should be more than 90%, should be less than 3% greater than 3 microns particles.SnO in vacuum drying oven after the oven dry wet-milling
2Powder.
Accurately take by weighing 3 kilograms of SnO that processed
2Dry powder.In the intermediate frequency crucible of ultrasonic system is housed, add the melting of 22 kilograms of fine silver ingots, when melt temperature reaches 1260～1130 ℃, putty powder is imported silver-colored liquation, open stirrer, make putty powder rotate into silver-colored liquation, stop stirrer; Keep the input of Medium frequency induction power, open ultrasonic vibration system, frequency is adjusted into hertz, continue 30 minutes; Stop Medium frequency induction, keep ultrasonic vibration, siller tin oxide liquation cooling ingot casting; Remove surface impurity, pore, ingot casting is processed into the extrusion ingot that diameter is 86mm, be squeezed into wire rod at 860 ℃, extrusion ratio 260, wire rod is prepared into the wire product of all size after wire drawing.
Wire product is done respectively 100 times～1000 times metallographicobservation of cross section and vertical section, and low power and high power observations show that all the SnO2 particle is evenly distributed in silver matrix.The Chemical Composition analysis is done in ten different sites samplings to wire product, and silver content mean value is 88.12%, and relative standard deviation 0.92% shows that the homogeneity of ingredients of product is good.
The cross section of wire product is the scanning electron microscope analysis result and is shown SnO
2Granular size has no the SnO greater than 6 microns between the 1.0-5.5 micron
2Particle is done the scanning of EDX face to the composition of tin and bismuth, and the picture result shows that tin, bismuth are evenly distributed in silver matrix.
To diameter be
Wire product do the rivet processing characteristics and detect, rivet specification F 3.0 * 1.5 (0.3), rivet cracking rate press from both sides flat cracking rate less than 2% less than 0.5%, show that wire rod has good rivet processing characteristics.
Embodiment 2
Take by weighing 5 kilograms of SnO
2Powder adds 0.5 kilogram of Sb
2O
3Powder, ball milling and mixed mixed SnO 30 minutes in planetary ball mill
2Powder is calcined in the high-temperature calcination stove, and 400 ℃ of insulations 0.5 hour, 700 ℃ were incubated 0.5 hour during calcining, and 1150 ℃ are incubated 2 hours.The other the same as in Example 1.
Wire product is done metallographic detection, scanning electron microscope and rivet Analysis of Machinability, and the result shows that prepared wire product has good homogeneous microstructure performance and processing characteristics equally.
Embodiment 3
Take by weighing 3 kilograms of SnO
2Powder, join in the aqueous solution that the cupric nitrate by 0.4 kilogram of Bismuth trinitrate and 0.15 kilogram forms, make bismuth and cupric ion form precipitation with the form of oxyhydroxide between adding ammoniacal liquor high speed pH value to 5.5～6.5, to be deposited in the vacuum drying oven and dry, the gained powder is calcined in the high-temperature calcination stove after 15 minutes at ball milling in planetary ball mill, 250 ℃ of insulations 1 hour, 560 ℃ were incubated 1 hour during calcining, and 1100 ℃ are incubated 2 hours.The other the same as in Example 1.
To diameter be
Wire product do the rivet processing characteristics and detect, rivet specification F 3.0 * 1.5 (0.3), rivet cracking rate press from both sides flat cracking rate less than 1% less than 0.3%, show that the rivet processing characteristics of wire rod is better than embodiment 1.
The cross section of wire product is the scanning electron microscope analysis result and is shown SnO
2Granular size has no the SnO greater than 5 microns between the 1.5-4.8 micron
2Particle is done the scanning of EDX face to the composition of tin, bismuth, copper, and the picture result shows that tin, bismuth and copper are evenly distributed in silver matrix.The particle size of oxide compound is greater than embodiment 1 in the present embodiment.
Embodiment 4
Take by weighing 5 kilograms of SnO
2Powder adds 0.8 kilogram of Bi
2O
3Powder and 0.15 kilogram of In
2O
3Powder, ball milling and mixed mixed SnO 30 minutes in planetary ball mill
2Powder is calcined in the high-temperature calcination stove, 1050 ℃ of insulations of calcining temperature 2 hours.SnO after the calcining
2Powder wet-milling 2 hours in agitating ball mill, SnO during wet-milling
2The ratio of powder and water is 0.5, and ball powder ratio is 3.0.SnO after the wet-milling
2Powder detects SnO with laser particle analyzer
2The granularity of powder guarantees D50 at 0.5～0.8 micron, less than 1 micron should be more than 90%, should be less than 3% greater than 3 microns particles.SnO in vacuum drying oven after the oven dry wet-milling
2Powder.
Accurately take by weighing 3 kilograms of SnO that processed
2Dry powder.In the intermediate frequency crucible of ultrasonic system is housed, add the melting of 22 kilograms of fine silver ingots, when melt temperature reaches 1260～1130 ℃, putty powder is imported silver-colored liquation, open stirrer, make putty powder rotate into silver-colored liquation, stop stirrer; Keep the input of Medium frequency induction power, open ultrasonic vibration system, frequency is adjusted into 20KHz, continue 30 minutes; Stop Medium frequency induction, keep ultrasonic vibration, siller tin oxide liquation cooling ingot casting; Remove surface impurity, pore, ingot casting is processed into the extrusion ingot that diameter is 86mm, be squeezed into wire rod at 900 ℃, extrusion ratio 220, wire rod is prepared into the wire product of all size after wire drawing.
Wire product is done respectively 100 times～1000 times metallographicobservation of cross section and vertical section, and low power and high power observations all show SnO
2Particle is evenly distributed in silver matrix.The Chemical Composition analysis is done in ten different sites samplings to wire product, and silver content mean value is 84.32%, and relative standard deviation 0.80% shows that the homogeneity of ingredients of product is good.
To diameter be
Wire product do the rivet processing characteristics and detect, rivet specification F 3.0 * 1.5 (0.3), rivet cracking rate press from both sides flat cracking rate less than 3% less than 1%.
Embodiment 5
Take by weighing 5 kilograms of SnO
2Powder adds 0.15 kilogram of WO
3Powder, ball milling and mixed mixed SnO 30 minutes in planetary ball mill
2Powder is calcined in the high-temperature calcination stove, and 400 ℃ of insulations 0.5 hour, 700 ℃ were incubated 0.5 hour during calcining, and 1150 ℃ are incubated 2 hours.The other the same as in Example 1.
Wire product is done metallographic detection, scanning electron microscope and rivet Analysis of Machinability, the result shows that prepared wire product has good homogeneous microstructure performance equally, rivet upsetting system and press from both sides flat test and have no cracking phenomena shows that the wire rod processing characteristics is better than other additive.
Embodiment 6
Accurately take by weighing 3.6 kilograms of commercially available SnO
2Powder.In the intermediate frequency crucible of ultrasonic system is housed, add the melting of 26.4 kilograms of fine silver ingots, when melt temperature reaches 1260～1130 ℃, putty powder is imported silver-colored liquation, open stirrer, make putty powder rotate into silver-colored liquation, stop stirrer; Keep the input of Medium frequency induction power, open ultrasonic vibration system, frequency is adjusted into 20KHz, continue 40 minutes; Stop Medium frequency induction, keep ultrasonic vibration, siller tin oxide liquation cooling ingot casting; Remove surface impurity, pore, ingot casting is processed into the extrusion ingot that diameter is 86mm, be squeezed into wire rod at 850 ℃, extrusion ratio 250, wire rod is prepared into the wire product of all size after wire drawing.
Wire product is done respectively 100 times～1000 times metallographicobservation of cross section and vertical section, and low power and high power observations all show SnO
2Particle overall distribution in silver matrix is uniformly, but the granules of stannic oxide widely dispersed, to about 30 microns existence being arranged all below 1 micron.The Chemical Composition analysis is done in ten different sites samplings to wire product, and silver content mean value is 88.55%, and relative standard deviation 1.02% shows that the homogeneity of ingredients of product is good.
To diameter be
Wire product do the rivet processing characteristics and detect, rivet specification F 3.0 * 1.5 (0.3), rivet cracking rate 3.5% shows the SnO that does not use the present invention used
2The pre-treating process of particle causes the deteriorated of rivet processing characteristics.
Be the electrical property of the sliver oxidized tin contactor materials of the present invention's preparation relatively, be processed into respectively the rivet of specification of the same race with the siller tin oxide wire rod of 1～No. 4 technique preparation of present embodiment and the siller tin oxide wire rod of commercially available representational chemical method, powder mixing method and internal oxidation preparation, each 6 on the rly. that is assemblied in specification of the same race is done the electrical property detection.
The electrical performance test condition is: coil activation voltage: 12VDC; Envrionment temperature: normal temperature; Contact load: 16A * 250VAC, resistive; Operating frequency: 20 beats/mins, dutycycle: 50%; Require electric life more than 100,000 times, wink sticking more than 6 times or continuous 2 winks sticking be judged to be defective.The electrical endurance test acquired results is as shown in table 1.
Table 1 embodiment and commercially available AgSnO
2(12) the electrical property contrast of material under the ac test condition
Above electrical performance test result shows that the sliver oxidized tin contactor materials of the present invention's preparation also has good electrical property.
Claims (9)
1. composite silver silver-tin oxide electric contact material, SnO in the material
2Weight percentage be 5-15%, surplus is silver, it is characterized in that, also contains additive in this material, comprises a kind or 2 kinds of element oxides in copper, tungsten, bismuth, indium, antimony, the tellurium, it adds up to weight to account for the 0.1%-3% of gross weight.
2. composite silver silver-tin oxide electric contact material as claimed in claim 1 is characterized in that, additive is CuO, WO
3, Bi
2O
3, In
2O
3, Sb
2O
3, TeO
2In one or several.
3. the preparation method of a composite silver silver-tin oxide electric contact material is characterized in that, may further comprise the steps:
SnO
2Mix with additive: additive is mixed in ball grinder with tin-containing material with the form of oxide compound, perhaps tin-containing material is joined in the aqueous solution of nitrate of additive, add again ammoniacal liquor and form precipitation;
High-temperature calcination: throw out is implemented high-temperature calcination, and calcining temperature is 100 ℃ of calcinings 0.5～2 hour, calcines 0.5～1.5 hour for 500-600 ℃, calcines 2～5 hours for 950～1100 ℃;
Wet-milling oven dry: burnt throw out is carried out stirring ball-milling process in the wet type agitating ball mill, select mill to be situated between to be 1～5 millimeter ZrO
2Ball, ball powder ratio 2～5:1 stirs time consuming 1～5 hour, and slurry concentration 20～50wt% carries out vacuum drying again;
Intermediate frequency (IF) smelting: ag material has been joined melting in hyperacoustic container, smelting temperature more than silver point 300～500 ℃;
Mix: in the ag material of melting, add the SnO after wet-milling is dried
2Powder, intermediate frequency stirred 30-50 minute, solidified ingot casting;
Finished product: with the ingot casting surface working, 840～920 ℃ of extruding, extrusion ratio 100～260 is made finished product again.
4. preparation method as claimed in claim 3 is characterized in that, SnO
2The mode of mixing with additive can adopt tin-containing material and the common melting of additive, adds concentrated nitric acid oxidation, adds ammoniacal liquor again and forms throw out, and throw out is filtered.
5. preparation method as claimed in claim 3 is characterized in that, tin-containing material is tin slab or putty powder, and wherein putty powder is selected from the putty powder that particle size range is the 1-5 micron.
6. preparation method as claimed in claim 3 is characterized in that, additive is CuO, WO
3, Bi
2O
3, In
2O
3, Sb
2O
3, TeO
2In one or several, weight percentage is at 0.1%-3%.
7. preparation method as claimed in claim 3 is characterized in that, the SnO after the wet-milling oven dry
2Powder choose particle size range answer powder diameter less than 1 micron particle volume per-cent more than 90%, should be less than 5% greater than the volume percent of 3 microns particles.
8. preparation method as claimed in claim 3 is characterized in that, described ag material is selected from atomizing silver powder or electrolytic silver powder or chemical silver powder.
9. preparation method as claimed in claim 3 is characterized in that, can wire drawing be prepared into linear material after the extruding in the finished product process, perhaps is squeezed into sheet material, is prepared into articles of sheet material behind rolling blanking.
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| CN103710556A (en) * | 2013-12-27 | 2014-04-09 | 桂林电器科学研究院有限公司 | Process for preparing silver tin oxide contact material through powder rolling method |
| CN104498764A (en) * | 2014-12-31 | 2015-04-08 | 靖江市海源有色金属材料有限公司 | Electric contact material and preparation method thereof |
| CN106057506A (en) * | 2016-07-19 | 2016-10-26 | 桂林电子科技大学 | Adding material for electrical contact surface coating and electrical contact manufacturing method |
| CN107400819A (en) * | 2017-06-15 | 2017-11-28 | 昆明理工大学 | A kind of preparation method of nano-metal-oxide enhancing Ag-based electrical contact material |
| CN107868880A (en) * | 2016-09-23 | 2018-04-03 | 霍尼韦尔国际公司 | Siluer metal oxide alloy and preparation method thereof |
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| CN102154572A (en) * | 2011-05-25 | 2011-08-17 | 宁波汉博贵金属合金有限公司 | Method for preparing sliver-tin oxide and indium oxide electrical contact material by gradient internal oxidation method and material thereof |
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| CN101798641A (en) * | 2010-04-15 | 2010-08-11 | 宁波汉博贵金属合金有限公司 | Spray atomization technology of silver tin oxide material |
| CN102154572A (en) * | 2011-05-25 | 2011-08-17 | 宁波汉博贵金属合金有限公司 | Method for preparing sliver-tin oxide and indium oxide electrical contact material by gradient internal oxidation method and material thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103710556A (en) * | 2013-12-27 | 2014-04-09 | 桂林电器科学研究院有限公司 | Process for preparing silver tin oxide contact material through powder rolling method |
| CN104498764A (en) * | 2014-12-31 | 2015-04-08 | 靖江市海源有色金属材料有限公司 | Electric contact material and preparation method thereof |
| CN106057506A (en) * | 2016-07-19 | 2016-10-26 | 桂林电子科技大学 | Adding material for electrical contact surface coating and electrical contact manufacturing method |
| CN107868880A (en) * | 2016-09-23 | 2018-04-03 | 霍尼韦尔国际公司 | Siluer metal oxide alloy and preparation method thereof |
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| US10727006B2 (en) | 2016-09-23 | 2020-07-28 | Honeywell International Inc. | Silver metal oxide alloy and method of making |
| CN107400819A (en) * | 2017-06-15 | 2017-11-28 | 昆明理工大学 | A kind of preparation method of nano-metal-oxide enhancing Ag-based electrical contact material |
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Application publication date: 20130109 |