CN1180102C - Preparation method of silver single or compound heavy rare earth metal oxide electric contact material - Google Patents
Preparation method of silver single or compound heavy rare earth metal oxide electric contact material Download PDFInfo
- Publication number
- CN1180102C CN1180102C CNB011316594A CN01131659A CN1180102C CN 1180102 C CN1180102 C CN 1180102C CN B011316594 A CNB011316594 A CN B011316594A CN 01131659 A CN01131659 A CN 01131659A CN 1180102 C CN1180102 C CN 1180102C
- Authority
- CN
- China
- Prior art keywords
- silver
- rare earth
- earth metal
- heavy rare
- metal oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Contacts (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a preparation method of an electric contact material of single or compound heavy rare earth metal oxide of silver, which is characterized in that electrolytic silver powder or chemical reduction silver powder with certain granularity is used as a silver component of the electric contact material of the single or compound heavy rare earth metal oxide of silver; single or compound heavy rare earth metal carbonate or oxalate powder is purified according to certain granularity; the silver component and the component of single rare earth carbonate or oxalate are mixed according to a certain mixture ratio (the weight ratio of silver and heavy rare earth metal oxide is 82 to 95:18 to 5) to prepare single or compound rare earth metal carbonate or oxalate mixed powder; rare earth carbonate or oxalate is decomposed by calcining to obtain single or compound heavy rare earth metal oxide compound powder; the single or compound heavy rare earth metal oxide compound powder of silver is pressed by moulding, sintered, extruded or forged, forged again and drawn, and the electric contact material is formed. The present invention has the advantages of simple manufacturing process, no waste gas and waste water discharging, low cost, etc., and the preparation method is suitable for commercial scale production.
Description
Technical field: the preparation method who the present invention relates to electric contact material.
Background technology: electric contact is the critical material of device for switching such as all kinds of switches, rly., contactor, plays a part connection, disjunction and transmission current.That uses in a large number in the domestic and international all kinds of low-voltage apparatuses at present is AgCdO, AgSnO
2Deng, over-all propertieies such as its processing characteristics, contact resistance, anti electric arc corrosion, with AgCdO the best, therefore, the AgCdO contact material is most widely used, and consumption is more and more.But because the AgCdO material produces the cadmium poison inevitably in production, use, cause environmental pollution, and in low-voltage apparatus miniaturization, high reliability, long-life process, deficiency such as the AgCdO material also exposes its melt resistance can be poor, electrical arc erosion is serious.Ag/SnO
2The novel contact material of AgCdO as an alternative, though have performances such as good anti-melting welding and anti-electrical arc erosion, but application practice shows this materials processing poor performance, extruding, wire drawing difficulty, lumber recovery is low, the system of upsetting rivet is easy to crack, and contact resistance height, temperature rise are big in addition, and the deficiency of processing performance and physicals has also limited the application of this material greatly.
(number of patent application: appearance 99115496.7) has overcome the deficiency of the electric use properties of existing main contact material performance to silver heavy rare earth metal oxide contact material, and it provides better selection for all kinds of low-tension switch electric appliance contact materials.But this material preparation process complexity, production efficiency is low, and environmental issue such as industrial wastewater discharge is arranged, though but by rationally handling qualified discharge, cost increases, the market competitiveness of material is descended.
Summary of the invention: technical problem to be solved by this invention is: the deficiency that overcomes original preparation technology, adopt efficient mixing technology, electrolytic silver powder or chemical reduction silver powder are mixed with single or compound heavy rare earth carbonate or oxalate, decompose through roasting and obtain the single or compound heavy rare earth metal oxide composite powder of silver.Provide that a kind of technology is simple, cost is low, be adapted to industrial-scale production, the preparation method of the silver-colored single or compound heavy rare earth metal oxide electric contact material of no waste water and gas discharging in the preparation process.
Technical scheme of the present invention is:
(1) with the electrolytic silver powder of certain particle size or chemical reduction silver powder is single as silver or the silver-colored component of compound heavy rare earth metal oxide electric contact material;
(2) single or compound heavy rare earth metal carbonate that certain particle size is purified or oxalate powder are as the rare-earth oxide component of silver heavy rake earth metal oxide electric contact material;
(3) silver-colored component and single rare earth carbonate or oxalate component are mixed according to a certain ratio (by silver: heavy rare earth metal oxide=82～95: 18～5 weight ratios), make silver single or compound rare-earth carbonate or oxalate mixed powder, decompose through roasting rare earth carbonate or oxalate, obtain the single or compound heavy rare earth metal oxide composite powder of silver;
(4) single or the compression moulding of compound heavy rare earth metal oxide composite powder, sintering, extruding or forging and pressing with silver, multiple forging, wire drawing, become a useful person.
The electrolytic silver powder structure is special among the present invention, is dendroid, be easy to mix with single or compound heavy rare earth carbonate or oxalate, but cost is high slightly; The granularity of electrolytic silver powder can be 0.01～10 micron; Chemical reduction silver powder is particulate state, select for use three only the motion mixer also it and single or compound heavy rare earth carbonate or oxalate can be mixed, chemical reduction silver powder preparation cost is low; The granularity of chemical reduction silver powder can be 0.01～10 micron; The purity of single or the compound heavy rare earth carbonate or the oxalate of the single or compound heavy rare earth metal oxide composite powder of preparation silver is greater than 99%, mix the back and satisfy silver: heavy rare earth metal oxide=82～95: 18～5 weight ratios, decompose the single or compound heavy rare earth metal oxide composite powder of acquisition silver through roasting.Silver roasting decomposition temperature single or compound heavy rare earth metal carbonate or oxalate mixture can be 600～850 ℃; Silver-colored single or the compression moulding of compound heavy rare earth metal oxide composite powder, sintering, forging and pressing or the extruding that roasting decompose is obtained, answer forging, wire drawing, become a useful person.Above-mentioned cold compaction forming pressure can be 200～500MPa, and billet density is 7～9g/cm after the compression moulding
3, sintering temperature can be 850～920 ℃, and sintering time can be 2～8hr, and density is 10.0～10.4g/cm after forging and pressing and multiple forging, extruding and the wire drawing
3, resistivity is 2.0～2.8 μ Ω cm, and hardness is HB760～1200, and tensile strength is 200～350Mpa, and unit elongation is 5-20%.Described heavy rare earth metal oxide can be one or more the mixture in dysprosium oxide, Holmium trioxide, Erbium trioxide, trioxide, ytterbium oxide, the lutecium oxide.
Major advantage of the present invention is:
(1), the present invention is with solid-state silver and solid-state heavy rare earths is single or compound carbonate or oxalate decompose the single or compound heavy rare earth metal oxide of preparation through efficient batch mixing, roasting and prepare ag-based contact material as reinforce, because the adding of high specific gravity rare-earth oxide also is evenly distributed on the silver matrix, reduced electrical contact surface because the composition that arcing produces changes and morphology change, the formation and the expansion of crackle have been reduced, help reducing contact resistance, improve the anti-melting welding of contact, the ability of anti-electrical arc erosion, and then improve the electric use properties of contact.
(2), the present invention is with solid-state silver and solid-state heavy rare earths is single or compound carbonate or oxalate decompose through efficient batch mixing roasting, can obtain epigranular, high dispersing, composition is accurate, interface binding power is strong silver-colored heavy rare earth metal oxide composite powder.Can obtain well single or compound heavy rare earth metal oxide contact material bulk or silk material of silver of disperse effect by follow-up powder metallurgical technique.
(3), the silver-colored heavy rare earth metal oxide contact material plastic deformation ability prepared of the present invention is good, easily extrusion rolling Cheng Sicai or sheet material.
(4), the present invention is raw materials used is easy to get, heavy rare earth metal oxide is that China is rich in resource, technology is simple, easy row, technological process is pollution-free.Especially the present invention can utilize compound heavy rare earth metal oxide to be raw material, and cost is lower, is suitable for industrial-scale production.
Embodiment
Embodiment one:
(1), by silver: ytterbium oxide=89: 11 (weight ratio) preparation electrolytic silver powder or chemical reduction silver powder and ytterbium carbonate, two kinds of powder are put into three motion mixer batch mixings 2 hours only, make the silver-colored ytterbium carbonate composite powder that mixes, with silver powder and ytterbium carbonate composite powder roasting 3 hours (800 ℃ of temperature), make silver-colored ytterbium oxide composite powder.
(2), with the repressed moulding of silver-colored ytterbium oxide composite powder, pressure is 300Mpa; Sintering, sintering temperature are 880 ℃, sintering time 3hr; Be squeezed into a material, extrusion ratio is 200; Be drawn to final size.
Embodiment two:
(1), configuration electrolytic silver powder or chemical reduction silver powder and mixed heavy rare earth oxalate (containing heavy rare earths thulium, ytterbium, lutetium) composite powder, its weight ratio is a silver: trioxide+ytterbium oxide+lutecium oxide=88: 12, with three only the motion mixer mixed 2 hours, make the silver-colored thulium oxalate ytterbium lutetium composite powder that mixes, with silver powder and thulium oxalate ytterbium lutetium composite powder roasting 3 hours (800 ℃ of temperature), make silver-colored trioxide ytterbium lutetium composite powder.
(2), with the repressed moulding of silver-colored ytterbium oxide composite powder, pressure is 300Mpa; Sintering, sintering temperature are 880 ℃, sintering time 3hr; Be squeezed into a material, extrusion ratio is 200; Be drawn to final size.
Claims (2)
1, the preparation method of the single or compound heavy rare earth metal oxide electric contact material of a kind of silver is characterized in that:
(1) be 0.01～10 micron electrolytic silver powder or chemical reduction silver powder is single as silver or the silver-colored component of compound heavy rare earth metal oxide electric contact material with granularity;
(2) with purity greater than 99% single or compound heavy rare earth metal carbonate or oxalate powder rare-earth oxide component as silver heavy rake earth metal oxide electric contact material;
(3) with silver-colored component and single or compound heavy rare earth metal carbonate or oxalate component by silver: heavy rare earth metal oxide=82～95: 18～5 weight ratio proportionings are mixed, make silver single or compound rare-earth carbonate or oxalate mixed powder, decompose through roasting rare earth carbonate or oxalate, obtain the single or compound heavy rare earth metal oxide composite powder of silver; Its roasting decomposition temperature is 600～850 ℃;
(4) single or the compression moulding of compound heavy rare earth metal oxide composite powder, sintering, extruding or forging and pressing with silver, multiple forging, wire drawing, become a useful person, forming pressure is 200～500Mpa, and sintering temperature is 850～920 ℃, and sintering time is 2～8hr.
2, the preparation method of the single or compound heavy rare earth metal oxide electric contact material of silver according to claim 1 is characterized in that: described heavy rare earth metal oxide is one or more the mixture in dysprosium oxide, Holmium trioxide, Erbium trioxide, trioxide, ytterbium oxide, the lutecium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011316594A CN1180102C (en) | 2001-12-31 | 2001-12-31 | Preparation method of silver single or compound heavy rare earth metal oxide electric contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011316594A CN1180102C (en) | 2001-12-31 | 2001-12-31 | Preparation method of silver single or compound heavy rare earth metal oxide electric contact material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1429922A CN1429922A (en) | 2003-07-16 |
| CN1180102C true CN1180102C (en) | 2004-12-15 |
Family
ID=4670769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011316594A Expired - Fee Related CN1180102C (en) | 2001-12-31 | 2001-12-31 | Preparation method of silver single or compound heavy rare earth metal oxide electric contact material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1180102C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114000006B (en) * | 2021-10-15 | 2022-05-10 | 昆明贵研新材料科技有限公司 | Silver-based composite material and preparation method thereof |
-
2001
- 2001-12-31 CN CNB011316594A patent/CN1180102C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1429922A (en) | 2003-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107794389B (en) | Silver tin oxide indium oxide electric contact material and preparation method thereof | |
| CN102031438A (en) | Sliver stannic oxide electrical contact material and preparation method thereof | |
| CN101651054A (en) | Preparation method of modified AgSnO2 electric contact material | |
| CN101127253B (en) | Silver nickel electricity-conductive ceramic electrical contact material and its production method | |
| CN102350502B (en) | Preparation method of silver-stannic oxide by using physical metallurgical coating method | |
| CN1195308C (en) | Nano silver-tin oxide electric contact and its prepn | |
| CN112375937A (en) | Powder metallurgy near-net-shape forming preparation method of dispersion copper composite electrical contact | |
| CN1180102C (en) | Preparation method of silver single or compound heavy rare earth metal oxide electric contact material | |
| CN104245976A (en) | Contact material | |
| CN1555074A (en) | Electric contact material for low voltage electric appliance | |
| CN101053903A (en) | Method for preparing silver copper oxide electric contacting material | |
| CN1065002C (en) | Sintering material on basis of silver-tin oxide for electrical contacts and process for its manufacture | |
| CN103667767A (en) | Preparation method of silver-nickel contact material containing additives capable of enhancing substrate performance and product prepared with method | |
| CN1100886C (en) | Silver heavy rake earth metal oxide electric contact material and its preparation process | |
| CN101656160B (en) | Preparing method of silver-base metal acid-salt electrical-contact composite material | |
| CN102031409A (en) | Silver-boron nitride-cerium switch apparatus contact material and preparation method thereof | |
| CN1316047C (en) | Copper-tungsten-carbon-titanium-rare earth alloy material and production thereof | |
| CN1091470C (en) | Electric contact material alloy based on silver-titanium and prodn. process therefor | |
| CN1221676C (en) | Electric alloy contact of silver, tin oxide and copper oxide and its production process | |
| CN102509654B (en) | Preparation method for silver stannic oxide wire | |
| CN1082235C (en) | Synthesis method for preparing silver-tin dioxide electric contact materials | |
| CN1231932C (en) | Silver base alloy electrical contact material and method for making same | |
| CN111463046B (en) | Silver zinc oxide sheet-shaped electrical contact and preparation method thereof | |
| CN114551134A (en) | Preparation method of grain-boundary-refined silver copper oxide electrical contact material | |
| CN1632894A (en) | Silver base rare earth alloy contact material for low-voltage switch electric appliance and method for preparing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |