CN1234591A - Synthesis method for preparing silver-tin dioxide electric contact materials - Google Patents
Synthesis method for preparing silver-tin dioxide electric contact materials Download PDFInfo
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- CN1234591A CN1234591A CN 99104491 CN99104491A CN1234591A CN 1234591 A CN1234591 A CN 1234591A CN 99104491 CN99104491 CN 99104491 CN 99104491 A CN99104491 A CN 99104491A CN 1234591 A CN1234591 A CN 1234591A
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Abstract
The synthesis method for preparing silver-tin dioxide electric electric contact material includes the following steps: using silve, silver oxide, tin, tin oxide and stannous sulfate as main raw material, at the same time adding trace elements of Ni, Mn, Cu, Bi, Mg and W as performance-regulating element, and adopting the processes of proportioning materials, mixing, making blank, sintering and vacuum-pressing to obtain said product or adding said mixed material to molten silver liquor, and utilizing systhesis reaction to obtain said product material. Said invention is simple in technological process, low in cost, can improve the combined state of silver-tin dioxide interface, raise its interface strength and other correspondent material properties.
Description
The present invention relates to a kind of method for preparing silver-tin dioxide electric contact materials, belong to the metal-base composites scientific domain.
The preparation method of known preparation silver-tin dioxide electric contact materials has following several, powder metallurgic method: this method is passed through silver (Ag), tin ash (SnO
2) powder fully mixes, pressed compact, sintering process obtain silver-tin dioxide electric contact materials, has also developed tin ash (SnO simultaneously
2) powder surface is silver-plated; Silver (Ag), tin ash (SnO
2) powder metallurgic method such as powder mechanical alloying prepares silver-tin dioxide electric contact materials.The deficiency of these class methods is tin ash (SnO
2) rely on exterior mechanical to add, to tin ash (SnO
2) granularity, the purity requirement of powder be higher, increased cost of material; Rely on the outside tin ash (SnO that adds
2) mode prepare silver-tin dioxide electric contact materials, cause silver-tin dioxide combination interface situation relatively poor, increased material fragility, cause that material following process operation increases, difficulty is big, complex process, be unfavorable for large-scale production.Internal oxidation: this method at first prepares silver (Ag)-Xi (Sn) alloy, then by dust or methods such as rapid solidification or rolling strip after, again alloy is carried out interior oxidation processes, to obtain silver-tin dioxide electric contact materials.The deficiency of this method is, do not having under the condition of adding element, can only obtain to be no more than the silver-tin dioxide electric contact materials of 5% (percentage by weight) tin ash, add active element after, tin ash (SnO in the silver-tin dioxide electric contact materials
2) content generally is no more than 12% (percentage by weight), the limitation of oxidation furnaces in being subjected to simultaneously, less, the complex process of manufacture of materials scale.Chemical coprecipitation:,, obtain silver (Ag), tin ash (SnO by the method for chemical precipitation with the compound of silver (Ag) and tin (Sn)
2) powder, then with powder compact, sintering.The deficiency of this method is to have the pollution problem of acid, alkali, salt; Production cycle is long, cost is higher, and the silver-tin dioxide interface is in conjunction with relatively poor.
The objective of the invention is a kind of new method of succeeding in developing at the deficiency that known technology exists, this method has been improved the bonding state at silver-tin dioxide interface, improved the bond strength at interface, the performance of product material is obviously improved, and technological process is simple, preparation cost is low.
The present invention realizes by following technical scheme.
Fig. 1 is a process chart of the present invention.Raw material, is pressed into pressed compact in the silver-colored solution and reacts synthetic after cold moudling through batching mixing in batch mixer, and the extruding behind ingot casting, wire drawing more promptly obtains the silver-tin dioxide electric contact materials finished product.Also the pressed compact of cold moudling can be inserted sintering in the sintering furnace, behind multiple pressure, double sintering, send extruding, wire drawing also can obtain qualified silver-tin dioxide point contact material again.One, raw material composition and shared percentage by weight thereof
1. reactive material:
1. silver oxide (AgO, Ag
2O) one or both in account for the 5-80% of total weight;
2. tin (Sn) accounts for the 1.25-20% of total weight;
3. stannous sulfate (SnSO
4), account for the 5-32% of total weight.
2. interpolation element:
1. a kind of in manganese (Mn), tungsten (W), the copper (Cu); Be no more than 0.04% of total weight;
2. one or both in nickel (Ni), bismuth (Bi), the magnesium (Mg); Be no more than 0.06% of total weight;
3. mixed rare-earth elements (RE) is no more than 0.03% of total weight;
4. tin ash (SnO
2), be no more than 0.008% of total weight.
3. main material: silver (Ag), the surplus of removing reactive material and adding element.Two, composition of raw materials
1. sintering, multiple compacting are equipped with silver-tin dioxide technology:
Reactive material 1.+2.+add element 1., 2., 3., three kinds+silver in 4.
2. the silvering solution precursor reactant synthesizes silver-tin dioxide technology:
Reactive material 3.+add element 1., 2., two kinds+silver three, technical conditions in 3.
1. mixing time: 2～8 hours;
2, blank briquetting pressure: 25～800 MPas (MPa);
3, liquid reaction synthesis temperature: 1000～1200 ℃, the time: 20 minutes～1.5 hours;
4, solid state reaction sintering temperature: 600～850 ℃, the time: 4～8 hours;
5, multiple pressure pressure: 800～1300 MPas (MPa);
6, double sintering temperature: 780～880 ℃, the time: 2～4 hours;
7, extrusion temperature: 600～850 ℃.
Compare advantage and the good effect that is had with known technology:
1. main wild phase tin ash (SnO
2) be to obtain by reacting synthetic, improved the bonding state at silver-tin dioxide interface, improved the bond strength at interface, the performance of finished-product material is improved significantly;
2. simple, with short production cycle, the cost that reduced material preparation of technological process;
3. can realize large-scale production, pollution-free or of low pollution in the production process.
Embodiment one
Take by weighing stannous sulfate (SnSO
4) 14.25 grams (13.7%), mixed 3 hours with 22 gram silver (Ag), under 30MPa, be pressed into base, other gets 68 gram silver (Ag) and puts into corundum crucible, after 1150 ℃ of fusings, is pressed into the reaction base, add trace bismuth (Bi), nickel (Ni) element simultaneously, after reaction is finished, pour liquation into the punching block ingot casting, can obtain to contain silver (Ag)-tin ash (SnO of tin ash 10% (percentage by weight) at last after extruding, the wire drawing
2) the contact material wire rod.Embodiment two
Press silver oxide (Ag
2O17.2%, AgO10%), the ratio preparation primary raw material of glass putty (Sn) 9.6%, silver powder (Ag) surplus, add micro-tin ash (SnO simultaneously
2), nickel (Ni), tungsten (W) element, mixed through 4 hours, bidirectional pressed moulding in punching block, briquetting pressure 550 MPas (MPa), through 780 ℃, 6 hours sintering, 1100 MPas (MPa) are multiple presses, and 800 ℃, 2.5 hours double sinterings, 800 ℃ of extruding, wire drawing can obtain to contain silver (Ag)-tin ash (SnO of tin ash 12% (percentage by weight)
2) the wire rod finished product.
Claims (4)
1. synthesis method for preparing silver-tin dioxide electric contact materials is characterized in that:
1) technological process: raw material after preparing burden in batch mixer mixing, through cold moudling, blank is pressed into silver-colored liquation
Middle reaction is synthetic, send extruding, wire drawing finished product again behind ingot casting,
2) raw material composition and shared percentage:
Reactive material:
Stannous sulfate (SnSO
4), account for the 5-32% of total weight,
Add element:
1. a kind of in manganese (Mn), tungsten (W), the copper (Cu); Be no more than 0.04% of total weight;
2. one or both in nickel (Ni), bismuth (Bi), the magnesium (Mg); Be no more than 0.06% of total weight;
3. mixed rare-earth elements (RE) is no more than 0.03% of total weight,
Main material: silver (Ag), the surplus of removing reactive material and adding element,
3) composition of raw materials:
Reactive material+interpolation element 1., 2., two kinds+silver in 3.
4) technical conditions:
1. mixing time is 2～8 hours;
2. blank briquetting pressure 25～800MPa;
3. the liquid reaction synthesis temperature is 1000～1200 ℃, 20 minutes～1.5 hours time;
4. extrusion temperature is 600～850 ℃,
2. synthesis method for preparing silver-tin dioxide electric contact materials is characterized in that:
1) technological process: raw material after preparing in batch mixer mixing, through cold moudling, blank enters sintering
Sintering in the stove carries out double sintering again after multiple the pressure, obtain finished product through the extruding wire drawing,
2) raw material composition and shared percentage:
Reactive material:
1. silver oxide (AgO, Ag
2O) one or both in account for the 5-80% of total weight;
2. tin (Sn) accounts for the 1.25-20% of total weight,
Add element:
1. a kind of in manganese (Mn), tungsten (W), the copper (Cu) is no more than 0.04% of total weight;
2. one or both in nickel (Ni), bismuth (Bi), the magnesium (Mg) are no more than 0.06% of total weight;
3. mixed rare-earth elements (RE) is no more than 0.03% of total weight;
4. tin ash (SnO
2), be no more than 0.008% of total weight,
Main material: silver (Ag), the surplus of removing reactive material and adding element,
3) composition of raw materials:
Reactive material 1.+2.+add element 1., 2., 3., three kinds+silver in 4.
4) technical conditions:
1. mixing time is 2～8 hours;
2. blank briquetting pressure 25～800MPa;
3. the sintering reaction temperature is 600～850 ℃, 4～8 hours time;
4. answer pressure pressure 800～1300MPa;
5. the double sintering temperature is 780～880 ℃, 2～4 hours time:
6. extrusion temperature is 600～850 ℃.
3. according to claim 1 described synthesis method for preparing silver-tin dioxide electric contact materials, it is characterized in that: take by weighing STANNOUS SULPHATE CRYSTALLINE (SnSO
4) 14.25 grams (13.7%), mixed 3 hours with 22 gram silver (Ag), under 30MPa, be pressed into base, other gets 68 gram silver (Ag) and puts into corundum crucible, after 1150 ℃ of fusings, is pressed into the reaction base, add trace bismuth (Bi), nickel (Ni) element simultaneously, after reaction is finished, pour liquation into the punching block ingot casting, at last extruding, wire drawing.
4. according to claim 2 described synthesis method for preparing silver-tin dioxide electric contact materials, it is characterized in that: press silver oxide (Ag
2O17.2%, AgO10%), glass putty (Sn) 9.6%, the ratio preparation primary raw material of silver powder (Ag) surplus adds micro-tin ash (SnO simultaneously
2), nickel (Ni), tungsten (W) element, mixed bidirectional pressed moulding in punching block through 4 hours, briquetting pressure 550 MPas (MPa), through 780 ℃, 6 hours sintering, 1100 MPas (MPa) are multiple pressed, 800 ℃, 2.5 hours double sinterings, 800 ℃ of extruding, wire drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99104491A CN1082235C (en) | 1999-05-10 | 1999-05-10 | Synthesis method for preparing silver-tin dioxide electric contact materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99104491A CN1082235C (en) | 1999-05-10 | 1999-05-10 | Synthesis method for preparing silver-tin dioxide electric contact materials |
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| CN1234591A true CN1234591A (en) | 1999-11-10 |
| CN1082235C CN1082235C (en) | 2002-04-03 |
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| CN99104491A Expired - Fee Related CN1082235C (en) | 1999-05-10 | 1999-05-10 | Synthesis method for preparing silver-tin dioxide electric contact materials |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299423B (en) * | 2008-06-19 | 2010-12-15 | 复旦大学 | Amorphous tungsten-doped tin dioxide transparent conductive oxide thin film and preparation method thereof |
| CN101973759A (en) * | 2010-09-07 | 2011-02-16 | 昆明理工大学 | Preparation method of noble metal doped In2O3/SnO3 porous-channel structured gas-sensitive material |
| CN102041474A (en) * | 2010-12-20 | 2011-05-04 | 昆明理工大学 | Preparation method for nano precious metal particle modified tin dioxide gas sensitive material |
| CN101794636B (en) * | 2010-02-02 | 2011-08-10 | 福达合金材料股份有限公司 | Preparation method of silver ferric oxide electrical contact material |
| CN104245976A (en) * | 2012-03-26 | 2014-12-24 | 优美科股份公司及两合公司 | Contact material |
| CN107761021A (en) * | 2017-09-11 | 2018-03-06 | 大连大学 | One kind mixes manganese orthorhombic phase stannic oxide reinforced Ag-based electrical contact material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1026637C (en) * | 1990-02-28 | 1994-11-16 | 中外电气工业株式会社 | Silver-tin oxide electric contact material and their method of production |
-
1999
- 1999-05-10 CN CN99104491A patent/CN1082235C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299423B (en) * | 2008-06-19 | 2010-12-15 | 复旦大学 | Amorphous tungsten-doped tin dioxide transparent conductive oxide thin film and preparation method thereof |
| CN101794636B (en) * | 2010-02-02 | 2011-08-10 | 福达合金材料股份有限公司 | Preparation method of silver ferric oxide electrical contact material |
| CN101973759A (en) * | 2010-09-07 | 2011-02-16 | 昆明理工大学 | Preparation method of noble metal doped In2O3/SnO3 porous-channel structured gas-sensitive material |
| CN101973759B (en) * | 2010-09-07 | 2012-11-28 | 昆明理工大学 | Preparation method of noble metal doped In2O3/SnO3 porous-channel structured gas-sensitive material |
| CN102041474A (en) * | 2010-12-20 | 2011-05-04 | 昆明理工大学 | Preparation method for nano precious metal particle modified tin dioxide gas sensitive material |
| CN102041474B (en) * | 2010-12-20 | 2013-03-06 | 昆明理工大学 | Preparation method for nano precious metal particle modified tin dioxide gas sensitive material |
| CN104245976A (en) * | 2012-03-26 | 2014-12-24 | 优美科股份公司及两合公司 | Contact material |
| CN104245976B (en) * | 2012-03-26 | 2017-06-09 | 优美科股份公司及两合公司 | Slider material |
| CN107761021A (en) * | 2017-09-11 | 2018-03-06 | 大连大学 | One kind mixes manganese orthorhombic phase stannic oxide reinforced Ag-based electrical contact material and preparation method thereof |
| CN107761021B (en) * | 2017-09-11 | 2019-04-30 | 大连大学 | One kind mixing manganese orthorhombic phase stannic oxide reinforced Ag-based electrical contact material and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1082235C (en) | 2002-04-03 |
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