CN1195308C - Nano silver-tin oxide electric contact and its prepn - Google Patents
Nano silver-tin oxide electric contact and its prepn Download PDFInfo
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- CN1195308C CN1195308C CNB021466963A CN02146696A CN1195308C CN 1195308 C CN1195308 C CN 1195308C CN B021466963 A CNB021466963 A CN B021466963A CN 02146696 A CN02146696 A CN 02146696A CN 1195308 C CN1195308 C CN 1195308C
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- oxide
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- tin dioxide
- electrical contact
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Abstract
The present invention discloses a nanometer silver-tin oxide electrical contact material and a preparation method thereof, which belongs to the technology of metal matrix composites. The electrical contact of the present invention is composed of 70 to 97% of silver, 3 to 22% of nanometer tin oxide and 0.1 to 8% of rare-earth elements. The nanometer silver-tin oxide electrical contact material is prepared by preparing nanometer tin oxide doped with zinc oxide or titanium oxide, mixing metal oxide powders, profiling the powders, sintering, extruding the mixture, drawing wires and manufacturing into rivets or strip and block contacts, wherein the pressure of the powder profiling is from 150 to 400MPa, and the sintering temperature is from 800 to 900 DEG C. The present invention has the advantages of high contact electric conductivity, low contact resistance, welding resistance, favorable performance of electric arc burning loss resistance, good thermal stability and simple preparation process; besides, the electrical contact of the present invention is widely used for electric appliances, meters and switches.
Description
Technical field
The present invention relates to electrical contact of a kind of silver-colored nano tin dioxide and preparation method thereof.Belong to the metal-base composites technical field.
Background technology
Electrical contact is the key element of appliance switch, instrument and meter etc., in contactor, relay and small-power circuit breaker.A large amount of both at home and abroad for a long time contacts that use Ag-CdO, it has good arc extinguishing, stable advantages such as contact resistance, but in recent years along with to the prolongation in electrical equipment useful life and the requirement of miniaturization, the AgCdO contact material has exposed its melt resistance can be poor, electrical arc erosion is serious, in use produce the cadmium poison inevitably, cause deficiencies such as environmental pollution.Sliver oxidized tin contactor materials is the very fast a kind of novel nontoxic electrical contact material of developed recently, it has Heat stability is good, anti-arc erosion and resistance fusion welding energy, the scope of application can reach 10-1000A, thereby guarantee the reliability of electric operation, improving useful life, is the ideal material that is used for replacing at contactor, relay and switch poisonous Agcdo at present.
Development siller tin oxide contact adopts two kinds of methods both at home and abroad at present: " internal oxidation " and " powder metallurgic method ".Internal oxidation is produced the siller tin oxide contact and is needed to add indium in alloy, so that Sn is oxidized to SnO
2The method production cost height, technology are complicated.Powder metallurgic method is produced siller tin oxide contact Germany and is led over the U.S., Japan,, they add a spot of WO in powder
3And MoO
3, properties of product are stable, to obtain practical application.The siller tin oxide contact is the focus of present domestic low voltage electrical apparatus industry research, however because its is difficult for drawing moulding, and contact resistance is bigger in the use, temperature rise, and become the difficult point of research.
Summary of the invention
The objective of the invention is to overcome the weak point that above-mentioned powder metallurgic method is produced the contact of siller tin oxide, a kind of new silver-colored nano tin dioxide electrical contact and preparation method thereof is provided.This electrical contact has the conductivity height, and even tissue is careful, interface bond strength is high, the characteristics of anti-melting welding, anti-electrical arc erosion, and its preparation technology is simple, cost is low.
The present invention is realized by following technical proposals.The electrical contact of the silver-colored nano tin dioxide of rivet or stick contact is characterized in that, electrical contact material is made up of the nano tin dioxide of silver, doping zinc-oxide or titanium oxide and cerium oxide or lanthana, and each composition weight content is:
Silver: 70～96%
The nano tin dioxide that mixes: 3～22%
Cerium oxide or lanthana: 0.1～8%
The weight ratio that contains zinc oxide or titanium oxide in the nano tin dioxide of above-mentioned doping is 0.5～10%.
The nano tin dioxide of above-mentioned doping is 5～10% of an electrical contact material total weight.
Adopt above-mentioned material to prepare the method for electrical contact, its process comprises that mainly sol-gel process prepares the nano oxidized tin powder of doping zinc-oxide or titanium oxide; Silver, dopen Nano tin oxide and cerium oxide or lanthanum oxide powder are mixed; Mixed powder isostatic compaction, sintering, extruding, wire drawing and system rivet and kicker is characterized in that: a. sol-gel process prepares nano tin dioxide, with SnCl
4And TiCl
4Or ZnCl
2And in both weight ratios: 5～9: 5～1 ratio.Adding concentration is in 20～30% ethanol waters, simultaneously to solution add that 5～10% triethanolamine disperses and and to drip concentration be the ammoniacal liquor of (1ML), in 40～60 ℃ of reactions, react to solution and be PH=7, product is after filtering 200～700 ℃ of roastings 2～3 hours, obtains the doping zinc-oxide that particle diameter is 6～20nm or the nano oxidized tin powder of titanium oxide; B. the metal dust mixing is by silver powder, nano tin dioxide and cerium oxide or lanthanum oxide powder weight ratio, and mixed in mixing tank 7～10 hours at 70～96: 3～22: 0.1～8.C. the powder of Hun Heing is under 20～30 ℃ temperature, with 250～500MPa extrusion forming, and 800～900 ℃ of sintering 4～10 hours.
Major advantage of the present invention is, the zinc oxide or the titanium oxide that mix enter the tin oxide lattice fully, and nano-powder is evenly distributed among the material, thereby has improved the conductivity of contact and reduced contact resistance, and then has improved the anti-melting welding of contact, the performance of anti-electrical arc erosion; Add thermal stability and anti-arc erosion and the non-oxidizability that rare earth element improves contact in the material, the plasticity of material improves is convenient to extrusion rolling processing, and processing technology is simple.
Specific implementation method
Embodiment one:
(1) with SnCl
4And TiCl
4, by weight: 8: 2 ratio, get SnCl
420 grams, TiCl
45 grams weigh, put into beaker, adding concentration is 30% ethanol water 20ml, adding 0.5 gram triethanolamine dispersant and drip concentration to solution simultaneously is (1mol) ammoniacal liquor 40ml, in 40～60 ℃ of reactions, react to solution and be pH=7, product is after filtering 200～700 ℃ of roastings 2～3 hours, and obtaining particle diameter is nano oxidized tin powder 8 grams of the adulterated TiOx of 20nm.
(2) with silver powder, nano tin dioxide and ceria oxide powder by weight 88: 10: 2, take by weighing silver powder 88 grams, nano tin dioxide 10 grams and cerium oxide 2 grams, in mixing tank, mixed 7～10 hours.The powder that mixes is under 20～30 ℃ temperature, with the 250MPa extrusion forming, and 800 ℃ of sintering 10 hours.
(3) material behind the sintering is pushed down at 700 ℃, extrusion ratio is 200; Obtain the wire rod of Φ 3.5～5.0mm, again with wire rod under 20 ℃, 2 meters/minute of drawing speeies are drawn to Φ 2.7～1.38mm silk material.
Silk material density: 9.9～10.7kg/cm
3, resistivity: 2.1～2.3 μ Ω .cm, hardness: HV 760～1100MPa (HV) tensile strength is: 260～350MPa, elongation are 18～30%.
Embodiment two:
1) with SnCl
4And TiCl
4, by weight: 9: 1 ratio weighs SnCl
427 gram and TiCl
43 grams, put into beaker, adding concentration is 30% ethanol water 30ml, simultaneously adding 0.7 gram triethanolamine dispersant and drip concentration to solution is (1mol) ammoniacal liquor 40mL, in 40～60 ℃ of reactions, reacts to solution and is pH=7, product is after filtering 200～700 ℃ of roastings 2～3 hours, and obtaining particle diameter is nano oxidized tin powder 10 grams of the adulterated TiOx of 20nm.
(4) with silver powder, nano tin dioxide and ceria oxide powder by weight 88: 10: 2, silver powder 44 grams, nano tin dioxide 5 grams and ceria oxide powder 1 gram mixed in mixing tank 7～10 hours.The powder that mixes is under 20～30 ℃ temperature, with the 250MPa extrusion forming, and 800 ℃ of sintering 10 hours.
(5) material behind the sintering is pushed down at 700 ℃, extrusion ratio is 200; Obtain the wire rod of Φ 3.5～5.0mm, again with wire rod under 20 ℃, 2 meters/minute of drawing speeies are drawn to Φ 2.7～1.38mm silk material.
Claims (4)
1, a kind of electrical contact of silver-colored nano tin dioxide, it is characterized in that: it is made up of the nano tin dioxide of silver, doping zinc-oxide or titanium oxide and cerium oxide or lanthana, and the weight content of each component is: silver: 70～96%, the nano tin dioxide that mixes: 3～22%, cerium oxide or lanthana: 0.1～8%.
2, by the electrical contact of the described silver-colored nano tin dioxide of claim 1, it is characterized in that: containing weight ratio in the nano tin dioxide of doping is 0.5～10% nano zine oxide or nano-titanium oxide.
3, by the electrical contact of the described silver-colored nano tin dioxide of claim 1, it is characterized in that: the nano tin dioxide of doping accounts for the electrical contact material total weight: 5～10%.
4, a kind of preparation method who prepares the electrical contact of silver-colored nano tin dioxide as claimed in claim 1: this method comprises that sol-gel process prepares the powder of the tin oxide of mixed nanometer zinc oxide or titanium oxide; The mixing of silver powder, nano tin dioxide and cerium oxide or lanthanum oxide powder; Mixed-powder isostatic compaction, sintering, extruding, wire drawing, system rivet or kicker is characterized in that:
A. sol-gel process prepares dopen Nano tin oxide, is with SnCl
4And TiCl
4Or ZnCl
2And according to 5～9: 5～1 of both weight ratios, adding concentration is in 20～30% ethanol waters, in solution, add triethanolamine dispersant and dropping ammonia simultaneously, in the reaction down of 40～60 ℃ of states, it is reacted to pH=7, then after filtration, product is 200～700 ℃ of roastings after 2～3 hours, obtains the powder of the nano tin dioxide of doping zinc-oxide that particle diameter is 6～20nm or titanium oxide;
B. the mixing of powder is nano tin dioxide and cerium oxide or the lanthanum oxide powder weight ratio by silver powder, doping: mixed in blend tank 7～10 hours at 70～96: 3～22: 0.1～8;
C. the powder of Hun Heing is under 20 ℃ temperature, with 250～500MPa extrusion forming, and 800～900 ℃ of sintering 4～10 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB021466963A CN1195308C (en) | 2002-11-05 | 2002-11-05 | Nano silver-tin oxide electric contact and its prepn |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021466963A CN1195308C (en) | 2002-11-05 | 2002-11-05 | Nano silver-tin oxide electric contact and its prepn |
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| CN1417817A CN1417817A (en) | 2003-05-14 |
| CN1195308C true CN1195308C (en) | 2005-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101911219B (en) * | 2008-01-17 | 2015-12-16 | 日亚化学工业株式会社 | Conductive material and manufacture method, electronic equipment, light-emitting device and manufacture method thereof |
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|---|---|---|---|---|
| CN1299307C (en) * | 2004-12-08 | 2007-02-07 | 昆明贵金属研究所 | Silver-tin oxide electrical contact material and preparation method thereof |
| CN100481289C (en) * | 2004-12-31 | 2009-04-22 | 西安工程科技学院 | Chemical coprecipitation preparation of nano-rave-earth blend AgSnO2 electric contacting alloy |
| CN100444294C (en) * | 2005-09-01 | 2008-12-17 | 中南大学 | Method for manufacturing sliver oxidized tin contactor materials |
| CN101217074B (en) * | 2008-01-14 | 2011-02-23 | 中希合金有限公司 | A silver tin/copper oxide compound electrical contact and preparation method |
| CN101964260B (en) * | 2008-12-15 | 2012-08-29 | 中国船舶重工集团公司第七二五研究所 | Ag/SnO2 electrical contact material and preparation method thereof |
| CN101609751A (en) * | 2009-07-27 | 2009-12-23 | 上海市机械制造工艺研究所有限公司 | Nano-doping stannic oxide powder and preparation method thereof |
| CN102321838B (en) * | 2011-10-11 | 2013-02-27 | 浙江大学 | Method for preparing Ag/SnO2 composite material |
| CN102509654B (en) * | 2011-10-27 | 2015-03-11 | 福达合金材料股份有限公司 | Preparation method for silver stannic oxide wire |
| CN102683050B (en) * | 2012-05-04 | 2014-11-19 | 温州宏丰电工合金股份有限公司 | Preparation method of nano Ag-SnO2 electric contact composite |
| CN104715939A (en) * | 2013-12-13 | 2015-06-17 | 西门子公司 | Disconnecting switch |
| CN104741602B (en) * | 2013-12-31 | 2017-09-15 | 施耐德电器工业公司 | A kind of electrical contact material including metal and metal oxide and preparation method thereof |
| CN105274381A (en) * | 2015-11-14 | 2016-01-27 | 华文蔚 | Silver/cadmium oxide material and preparing method thereof |
| CN106683914B (en) * | 2017-02-25 | 2018-10-19 | 河北工业大学 | A kind of low-voltage electrical apparatus copper-based electrical contact material and preparation method thereof |
| CN112779436A (en) * | 2020-12-23 | 2021-05-11 | 佛山市诺普材料科技有限公司 | AgNi electrical contact material and preparation method thereof |
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2002
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101911219B (en) * | 2008-01-17 | 2015-12-16 | 日亚化学工业株式会社 | Conductive material and manufacture method, electronic equipment, light-emitting device and manufacture method thereof |
| US9812624B2 (en) | 2008-01-17 | 2017-11-07 | Nichia Corporation | Method for producing conductive material, conductive material obtained by the method, electronic device containing the conductive material, light-emitting device, and method for producing light-emitting device |
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| CN1417817A (en) | 2003-05-14 |
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