CN100484665C - Method for preparing silver copper oxide electric contacting material - Google Patents
Method for preparing silver copper oxide electric contacting material Download PDFInfo
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- CN100484665C CN100484665C CNB2007100687860A CN200710068786A CN100484665C CN 100484665 C CN100484665 C CN 100484665C CN B2007100687860 A CNB2007100687860 A CN B2007100687860A CN 200710068786 A CN200710068786 A CN 200710068786A CN 100484665 C CN100484665 C CN 100484665C
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Abstract
A method of preparing silver copper oxide electrical contact material is disclosed. The raw material composition, particle size, weight percentage are in that: base metal: silver powder and copper oxide powder have powder particle size of 1.5 mu m -50 mu m, copper oxide powder takes the quantity of more than 2%-25%, based on total weight, the rest is silver; additive: bismuth oxide does not exceed 0.9% of the total weight, nickel oxide does not exceed 1% of total weight. Raw material is surface treated, after batching, the raw material is mixed uniformly in a powder mixing machine to form an isostatic pressing ingot after isostatic pressed; The isostatic pressing ingot is sintered in a heating furnace to obtain a sintered ingot; then the sintered ingot is transported into a extruder to extrude into a plate or wire material. The produced silver copper oxide electrical contact material can satisfy the operation requirement of high-performance low-voltage electrical apparatus, thus is applicable to a DC contactor especially.
Description
Technical field:
The invention belongs to the metal-base composites scientific domain, refer in particular to a kind of preparation method of silver copper oxide electric contacting material.
Background technology:
The preparation method of known silver copper oxide electric contacting material has following several: (1) prepares cupric oxide powder by the quench solidification technology, through mechanical alloying or additive method silver powder is mixed with cupric oxide powder, make silver copper oxide electric contacting material through being pressed into ingot, sintering, extruding, drawing or rolling mill practice again; (2) prepare the silver copper oxide composite powder by chemical precipitation technology, repressed again one-tenth ingot, sintering, extruding, drawing or rolling mill practice are made silver copper oxide electric contacting material; (3) mix powder by silver powder, cupric oxide powder hybrid technique, repressed again one-tenth ingot, sintering, extruding, drawing or rolling mill practice are made silver copper oxide electric contacting material; (4) make silver be coated on the cupric oxide surface by the chemical packs coating process, form the silver copper oxide composite powder, repressed again one-tenth ingot, sintering, extruding, drawing or rolling mill practice are made silver copper oxide electric contacting material; (5) with the silver oxide reactant by reaction synthesis method, through mixing, compression moulding, reaction and sintering, repressing and re-sintering, push, be drawn into silver copper oxide electric contacting material (silk material).
As Chinese patent disclosed " a kind of preparation method of silver copper oxide electric contacting material " (CN1528929, open day on September 15th, 2004), it is a raw material with silver powder, copper powder or yellow gold powder, adding a spot of tungsten, aluminium element is that performance is adjusted element, with the silver oxide is reactant, becomes silver copper oxide electric contacting material (silk material) through mixing, press forming, reaction-sintered, repressing and re-sintering, extruding, drawing.Have that the reaction of cupric oxide is synthetic once to be finished with the material sintering, characteristics such as silver is fresh with the formed interface of cupric oxide, it is firm to combine, material high comprehensive performance; And the disperse of oxide particle is finished with machining deformation, has reduced production cost; Entire production process controls easily, pollution-free or of low pollution, can form production in enormous quantities.During product can be widely used in, the contact material of low-voltage electrical apparatus.
The technology of preparing of these known silver copper oxide electric contacting materials all is to study and invent for the environmental requirement of reply European Union two instructions.From the technology of preparing of these known silver copper oxide electric contacting materials, there is certain difficulty in the materials processing of high oxidation weight of copper degree, does not see that the silver copper oxide electric contacting material that these known technology productions are arranged can satisfy the report of high-performance low-voltage electrical apparatus instructions for use simultaneously.
Summary of the invention:
The objective of the invention is at the deficiency of processability in the known silver copper oxide electric contacting material technology of preparing and material system and a kind of novel processing method of developing, this silver copper oxide electric contacting material can satisfy the instructions for use of high-performance low-voltage electrical apparatus, is specially adapted to D.C. contactor.
The present invention is achieved through the following technical solutions:
A kind of preparation method of silver copper oxide electric contacting material is characterized in that:
1) technological process: raw material is through surface treatment-silver powder and cupric oxide powder are carried out surface treatment, form fresh contact interface, improve surface-active, make silver powder when mixing, in conjunction with firm with cupric oxide powder, improve drawing abillity, mix in mixed powder machine after preparing burden through the raw material after the surface treatment, formation waits the static pressure ingot blank after waiting static pressure, waits the static pressure ingot blank to carry out sintering in heating furnace, become the sintering ingot blank, the sintering ingot blank send extruder extrusion board or wire rod;
2) material composition, granularity and shared percentage by weight:
Base-material comprises silver powder, cupric oxide powder, and powder size is at 1.5 μ m-50 μ m;
Additive comprises: 1. bismuth oxide, 2. nickel oxide;
Wherein, cupric oxide powder accounts for the 2-25% of the whole powder gross weights of raw material, and bismuth oxide is no more than 0.9% of the whole powder gross weights of raw material, and nickel oxide is no more than 1% of the whole powder gross weights of raw material, and surplus is a silver;
3) composition of raw materials: base-material, base-material+additive is 1., or base-material+additive is 2., or base-material+additive is 1. 2.;
4) technical conditions:
1. raw material surface treatment temperature: 50 ℃-400 ℃, the time: 1 hour-20 hours;
2. mix the powder time: 0.5 hour-15 hours;
3. isostatic compaction pressure: 50MPa-300MPa;
4. ingot blank sintering temperature: 500 ℃-930 ℃, the time: 2 hours-8 hours;
5. sintering ingot blank extrusion temperature: 600 ℃-900 ℃.
Silver powder is the mixed powder of chemical silver powder and atomizing silver powder, and chemical silver powder accounts for the 1%-99% of silver powder weight, and atomizing silver powder accounts for the 99%-1% of silver powder weight.
The present invention (CN1528929) compares with " a kind of preparation method of silver copper oxide electric contacting material ", and (1) material system design is different: its usefulness be silver powder, copper powder or yellow gold powder, what the present invention used is silver powder, cupric oxide powder; The additive difference: its usefulness be tungsten, molybdenum, what the present invention used is bismuth oxide, nickel oxide.(2) sintering reaction mechanism difference, it is a reaction-sintered, the solid phase reaction original position by stock yard in silver matrix generates copper oxide particle; The present invention is the physical reactions sintering, increases silver and cupric oxide physical bond intensity.(3) the present invention carries out surface treatment to raw material, forms fresh and active interface, increases binding energy between particle, and its this technology not.
In a word, the present invention compare with known technology of preparing the institute have following advantage and good effect: (1) carries out surface treatment to silver powder and cupric oxide powder, forms fresh contact interface, improve surface-active, make silver powder when mixing,, improve drawing abillity in conjunction with firmly with copper oxide particle; (2) material system of science design has improved drawing abillity and electric property; (3) electric property of the silver copper oxide electric contacting material of this method preparation has satisfied the high performance requirements of low-voltage electrical apparatus; (4) the silver copper oxide electric contacting material raw material of this method preparation is prepared simply, and technological process is easy to control, and is with short production cycle, can realize producing in enormous quantities, and production cost is low.
Silver powder adopts the atomizing silver powder of grain shape sub-circular and the mixed powder of dendritic chemical silver powder, better effects if.
Description of drawings:
Fig. 1 is a process chart of the present invention.
The specific embodiment:
Embodiment one: the cupric oxide powder (percentage by weight) by 10%, 90% silver powder (percentage by weight) are raw material, handled 5 hours at 180 ℃ of lower surfaces, behind 12 hours mixed powder, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 700 ℃, 8 hours, and under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carries out the multiple silver of surface treatment, rolling, punch forming are processed into strip-form contacts.
Embodiment two: the cupric oxide powder (percentage by weight) by 15%, 84.5% silver powder (percentage by weight) are raw material, and add 0.5% bismuth oxide, handled 8 hours at 250 ℃ of lower surfaces, behind 15 hours mixed powder, depress to ingot blank at the hydrostatic pressure of 270MPa, carried out sintering in 750 ℃, 10 hours, under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
Embodiment three: the cupric oxide powder (percentage by weight) by 15%, 84.7% silver powder (percentage by weight) are raw material, and add 0.3% nickel oxide, handled 8 hours at 250 ℃ of lower surfaces, behind 15 hours mixed powder, depress to ingot blank at the hydrostatic pressure of 270MPa, carried out sintering in 750 ℃, 10 hours, under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
Embodiment four: the cupric oxide powder (percentage by weight) by 15%, 84.3% silver powder (percentage by weight) are raw material, and add 0.3% nickel oxide, 0.4% bismuth oxide; Handled 8 hours at 200 ℃ of lower surfaces, behind 14 hours mixed powder, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 10 hours, under 800 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
Embodiment five: the cupric oxide powder (percentage by weight) by 15%, 85% silver powder (percentage by weight) are raw material, handled 8 hours at 200 ℃ of lower surfaces, behind 14 hours mixed powder, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 10 hours, and under 800 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carries out the multiple silver of surface treatment, rolling, punch forming are processed into strip-form contacts.
Embodiment six: the cupric oxide powder (percentage by weight) by 10%, 90% silver powder (percentage by weight) are raw material, handled 5 hours at 180 ℃ of lower surfaces, behind 12 hours mixed powder, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 700 ℃, 8 hours, under 750 ℃ temperature conditions, be squeezed into a material then, last cold drawing or hot pull Cheng Sicai.
Claims (3)
1, a kind of preparation method of silver copper oxide electric contacting material is characterized in that:
1) technological process: raw material carries out surface treatment through a pair of silver powder of surface treatment and cupric oxide powder, form fresh contact interface, improve surface-active, make silver powder when mixing, in conjunction with firm with cupric oxide powder, improve drawing abillity, mix in mixed powder machine after preparing burden through the raw material after the surface treatment, formation waits the static pressure ingot blank after waiting static pressure, waits the static pressure ingot blank to carry out sintering in heating furnace, become the sintering ingot blank, the sintering ingot blank send extruder extrusion board or wire rod;
2) material composition, granularity and shared percentage by weight:
Base-material comprises silver powder, cupric oxide powder, and powder size is at 1.5 μ m-50 μ m;
Additive comprises: 1. bismuth oxide, 2. nickel oxide;
Wherein, cupric oxide powder accounts for the 2-25% of the whole powder gross weights of raw material, and bismuth oxide is no more than 0.9% of the whole powder gross weights of raw material, and nickel oxide is no more than 1% of the whole powder gross weights of raw material, and surplus is a silver;
3) composition of raw materials: base-material, base-material+additive is 1., or base-material+additive is 2., or base-material+additive is 1. 2.;
4) technical conditions:
1. raw material surface treatment temperature: 50 ℃-400 ℃, the time: 1 hour-20 hours;
2. mix the powder time: 0.5 hour-15 hours;
3. isostatic compaction pressure: 50MPa-300MPa;
4. ingot blank sintering temperature: 500 ℃-930 ℃, the time: 2 hours-8 hours;
5. sintering ingot blank extrusion temperature: 600 ℃-900 ℃.
2, the preparation method of a kind of silver copper oxide electric contacting material according to claim 1, it is characterized in that: described silver powder is the mixed powder of chemical silver powder and atomizing silver powder, chemistry silver powder accounts for the 1%-99% of silver powder weight, and atomizing silver powder accounts for the 99%-1% of silver powder weight.
3, the preparation method of a kind of silver copper oxide electric contacting material according to claim 1 and 2, it is characterized in that: be that 10% cupric oxide powder, 90% silver powder are raw material by weight percentage, handled 5 hours at 180 ℃ of lower surfaces, behind 12 hours mixed powder, depress to ingot blank at the hydrostatic pressure of 250MPa, carried out sintering in 700 ℃, 8 hours, under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
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| CNB2007100687860A CN100484665C (en) | 2007-05-23 | 2007-05-23 | Method for preparing silver copper oxide electric contacting material |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101651054B (en) * | 2009-09-11 | 2012-11-21 | 昆明理工大学 | Preparation method of modified AgSnO2 electric contact material |
| CN101798641B (en) * | 2010-04-15 | 2011-05-11 | 宁波汉博贵金属合金有限公司 | Spray atomization technology of silver tin oxide material |
| CN102808097B (en) * | 2012-08-20 | 2014-04-16 | 温州宏丰电工合金股份有限公司 | Silver/nickel/metallic oxide electrical contact material preparation method |
| US10099286B2 (en) * | 2012-08-20 | 2018-10-16 | Wenzhou Hongfeng Electrical Alloy Co., Ltd. | Preparation method of electrical contact material |
| CN103045895A (en) * | 2013-01-17 | 2013-04-17 | 上海大趋金属科技有限公司 | Electric contact material and preparation method thereof |
| CN105047442B (en) * | 2015-07-13 | 2017-07-18 | 青海大学 | A kind of Ag CuO low-pressure contact materials and preparation method thereof |
| CN111468718B (en) * | 2020-03-07 | 2022-03-25 | 浙江福达合金材料科技有限公司 | Silver copper oxide sheet-shaped electric contact and preparation method thereof |
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Non-Patent Citations (2)
| Title |
|---|
| 粉末冶金银-氧化铜触头材料. 张齐勋，谢健全.中国有色金属学报，第6卷第2期. 1996 |
| 粉末冶金银-氧化铜触头材料. 张齐勋，谢健全.中国有色金属学报，第6卷第2期. 1996 * |
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Address after: No. four, No. 518, Binhai Park, Wenzhou economic and Technological Development Zone, Zhejiang, China Patentee after: Fuda Alloy Materials Co., Ltd. Address before: No. 36, Mount Ping Road, Liushi Town, Yueqing, Zhejiang Patentee before: Fuda Alloy Materials Co., Ltd. |
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Effective date of registration: 20220130 Address after: 325025 No. 308, Binhai fifth road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Patentee after: Zhejiang Fuda alloy material technology Co.,Ltd. Address before: No. 518, Binhai 4th Road, Binhai Park, Wenzhou Economic and Technological Development Zone, Zhejiang Province, 325000 Patentee before: FUDA ALLOY MATERIALS Co.,Ltd. |