CN105551838A - Processing method for silver-tin oxide-indium oxide flake electrical contact containing additive - Google Patents
Processing method for silver-tin oxide-indium oxide flake electrical contact containing additive Download PDFInfo
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- CN105551838A CN105551838A CN201511009689.5A CN201511009689A CN105551838A CN 105551838 A CN105551838 A CN 105551838A CN 201511009689 A CN201511009689 A CN 201511009689A CN 105551838 A CN105551838 A CN 105551838A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
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- Manufacturing & Machinery (AREA)
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Abstract
The invention discloses a processing method of a silver-tin oxide-indium oxide flake electrical contact containing an additive. Particularly, the method comprises the following steps: calculating the amount of required silver, tin, indium and additive according to the material proportions for a to-be-prepared silver-tin oxide-indium oxide flake electrical contact, and weighing the required silver, tin, indium and additive for later use; smelting taken silver, tin, indium and additive into melt in a medium-frequency melting furnace, casting the melt into an ingot blank and then obtaining an AgSnIn alloy strip with a certain specification through extruding and rolling procedures; feeding taken pure Ag strip and obtained AgSnIn alloy strip into a tube-type resistance furnace for heating, feeding the strips from the tube-type resistance furnace into a roller for hot roll bonding to obtain an AgSnIn/Ag composite strip; and carrying out annealing, rolling and punch forming on the obtained AgSnIn/Ag composite strip and then carrying out internal oxidation treatment, wherein the process of heating the alloy strip and the pure Ag strip in the tube-type resistance furnace and the process of feeding the strips into the roller are carried out under a protective atmosphere.
Description
Technical field
The present invention relates to the processing method of Ag-based electrical contact material, be specifically related to a kind of processing method of the silver-tin oxide or indium oxide sheet electrical contact containing additive.
Background technology
Silver tin-indium alloy material is under the effect of internal oxidition, and tin, indium oxide form a large amount of tiny acicular constituent in silver matrix, in the electrical contact application of inductive load, show very strong anti electric arc corrosion and resistance to electrical wear characteristic.These excellent properties that alloy inner oxidation method silver-tin oxide or indium oxide material has make it obtain on the large contactor of arc energy and circuit breaker to apply very widely.
The preparation method of current silver-tin oxide or indium oxide contact material with the alloy inner oxidation method of Japan for representative, this method is that silver-colored tin-indium alloy is prepared into silver-colored tin-indium alloy by the method for melting, then in high temperature high oxygen pressure atmosphere, make tin, indium and Addition ofelements be oxidized to oxide particle, and form the silver-tin oxide or indium oxide material of metal oxide Dispersed precipitate in silver matrix.Alloy inner oxidation method in production practices has front oxidizing process and rear oxidation method two kinds: front oxidizing process blade contact carries out fragmentation again and is squeezed into band after mainly first alloy wire or sheet material being oxidized, and the silver oxide band of gained obtains blade contact by carrying out punch process after method hot rolling last layer fine silver; Rear oxidation method sheet material is then directly after silver alloy compound last layer fine silver, carry out the alloy sheet material that punching press obtains being compounded with fine silver layer, then carry out the silver oxide blade contact that internal oxidition obtains being covered with silver layer.Two kinds of processing technologys are compared, front oxidizing process operation is long, production lumber recovery is low, and the acicular constituent formed in internal oxidition process is destroyed the anti electric arc corrosion and abrasive resistance reduction that make contact material by the fragmentation extruding in front oxidizing process technique after internal oxidition, therefore rear oxidation method technique blade contact not only all seems more excellent in production efficiency and electrical property.
Existing rear oxidation legal system for the key step of silver-tin oxide or indium oxide sheet electrical contact method is: melting and casting square ingot blank-plane processing-soldering and sealing-method hot rolling-sub-cut-punching press-internal oxidition-reprocessing (mountain bank Xuan Hang etc., electrical material, 2012,03:47-52, electrical contact material [J] .).But this technique has the following disadvantages:
1) adopt square spindle as production unit, production unit is little, and each spindle is about about 15kg, and production efficiency is low, and spindle method hot rolling is owing to affecting by clamping, carrying etc., is unfavorable for the production automation;
2) leftover pieces are many end to end for spindle method hot rolling gained wide plate; Cause scrap (bridge) to waste punching press after sheet material sub-cut, total lumber recovery is low by only about 20%;
3) adopt spindle method hot rolling, be difficult in hitch feed process protect spindle not oxidated, affect the uniformity of metallographic structure;
4) adopt spindle composite pressure large, easily cause roll cracking damage, compound gained rolling wide plate, is difficult to controlling dimension precision and surface smoothness;
5) soldering and sealing spindle process has stronger arc radiation, is harmful to operator ' s health.
Summary of the invention
The technical problem to be solved in the present invention is to provide the processing method of the silver-tin oxide or indium oxide sheet electrical contact containing additive that a kind of continuous production is good, lumber recovery is high.
The processing method of the silver-tin oxide or indium oxide sheet electrical contact containing additive of the present invention, comprises the following steps:
1) consumption of silver, tin, indium and the additive needed for material mixture ratio calculating of the silver-tin oxide or indium oxide electrical contact prepared as required, takes for subsequent use; Described additive is nickel and/or copper;
2) get silver and be placed in melting in mid-frequency melting furnace, then add the tin, indium and the additive that take and continue melting, gained liquation is cast into circular ingot blank, and through the AgSnIn alloy strip steel rolled stock extruded, rolling process obtains certain specification;
3) get in pure Ag band and gained AgSnIn alloy strip steel rolled stock feeding tube type resistance furnace and heat, the temperature controlled in tube type resistance furnace is 300 ~ 800 DEG C; Send in roll afterwards and carry out method hot rolling, controlled rolling deflection is 50 ~ 70%, obtains AgSnIn/Ag composite strip; Wherein, after heating process in tube type resistance furnace of described AgSnIn alloy strip steel rolled stock and pure Ag band and this process until the process sending into roll is all carried out under protective atmosphere;
4) gained AgSnIn/Ag composite strip is through annealing, rolling, punch forming, obtains the sheet material of required specification;
5) resulting sheet carries out internal oxidition process, obtains the silver-tin oxide or indium oxide sheet electrical contact containing additive.
The step 1 of above-mentioned preparation method) in, need in the silver-tin oxide or indium oxide electrical contact material of preparation, the content of additive accounts for 0.1 ~ 0.5wt%, and the content of tin accounts for 4.7 ~ 8.5wt%, and the content of indium accounts for 2.45 ~ 3.7wt%, and surplus is silver.When additive is nickel and copper adds simultaneously, under their interpolation total amount is no more than the condition of above-mentioned restriction, the proportioning between nickel and copper is any proportioning.
The step 2 of above-mentioned preparation method) in, the temperature of melting in mid-frequency melting furnace, and it is all same as the prior art to obtain the operations such as the casting after liquation, extruding, rolling.Preferably, get silver and charcoal (adding charcoal can avoid the material in fusion process in crucible not oxidized, play the effect of insulation simultaneously, its addition is generally the material that can all cover in crucible) put into intermediate frequency furnace graphite crucible, be placed in mid-frequency melting furnace and be warming up to 1100 ~ 1200 DEG C of insulated and stirred 5 ~ 10min, be cooled to 1000 ~ 1050 DEG C afterwards, continue afterwards to add tin, indium and additive, be warming up to 1100 ~ 1150 DEG C of insulated and stirred 3 ~ 5min, drag for slag after leaving standstill 1 ~ 2min and be cast into circular ingot blank; Gained ingot blank carries out carrying out extruding after turnery processing removes surface impurity and greasy dirt and rolling (being generally cold rolling) becomes the alloy strip steel rolled stock of certain specification (specification according to final products is arranged) further, the temperature of described hot extrusion is 500 ~ 900 DEG C, extrusion ratio is 40 ~ 320, is preferably 66 ~ 316; Rolling reduction≤20%/time (control controlled rolling deflection≤20% during each rolling, determine the number of times of rolling according to the thickness of products obtained therefrom) is controlled during described rolling.
The step 3 of above-mentioned preparation method) in, preferably the temperature controlled in tube type resistance furnace is 400 ~ 600 DEG C, and preferred rolling reduction is 50 ~ 60%, and mill speed is 5 ~ 10m/min.When the temperature in tube type resistance furnace be 400 ~ 600 DEG C, rolling time mill speed be 5 ~ 10m/min time, in described tube type resistance furnace, heating zone length is generally 2 ~ 6m.Described protective atmosphere is the inert gases such as nitrogen, argon gas or helium, also can be that the atmosphere with reproducibility is as hydrogen etc.
The step 4 of above-mentioned preparation method) in, the operation such as described rolling, punch forming is all same as the prior art.Described rolling can be cold rolling (rolling reduction for be preferably≤20%/time) or hot rolling (rolling reduction be preferably≤30%/time); Need after rolling to carry out annealing operation, this annealing operation is identical with existing routine operation, and usually controlling annealing temperature is 550 ~ 700 DEG C, annealing time 1 ~ 3 hour.
The step 5 of above-mentioned preparation method) in, described internal oxidition process is same as the prior art, particularly, is at 500 ~ 850 DEG C, insulation 24 ~ 72h under the condition of partial pressure of oxygen 0.2 ~ 1.0MPa by resulting sheet.
The present invention adopts the technique by AgSnIn alloy strip steel rolled stock and pure Ag band continuously hot rolling Compound Machining silver-tin oxide or indium oxide sheet electrical contact, and compared with prior art, its feature is:
1, continuous production strong, easily be automated, production efficiency is high;
2, production process generation leftover pieces are few, and total lumber recovery reaches 30% ~ 45%, and lumber recovery is high;
3, heating and method hot rolling all carry out under protective atmosphere protection, and gained alloy strip steel rolled stock does not affect the metallographic structure uniformity of final products by air oxidation;
4, gained composite strip thickness distribution is even, and surface smoothness is good;
5, radiationless pollution in production process;
6, product has good anti electric arc corrosion performance.
Accompanying drawing illustrates and supplements
Fig. 1 makes the heating of AgSnIn/Ag composite strip of the present invention and the structural representation of method hot rolling device;
Fig. 2 is the blade contact product figure that the embodiment of the present invention 1 obtains;
Fig. 3 is the metallographic structure figure of the blade contact product that the embodiment of the present invention 1 obtains.
Number in the figure is:
1AgSnIn alloy strip steel rolled stock; 2 pure Ag bands; 3 tube type resistance furnaces; 4 rolls; 5 winders.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and to understand content of the present invention better, but the present invention is not limited to following examples.
Fig. 1 makes the heating of AgSnIn/Ag composite strip of the present invention and the structural representation of method hot rolling device, comprises the tube type resistance furnace 3, roll 4 and the winder 5 that arrange by process sequence.In described tube type resistance furnace 3, heating zone length is 4m.The outlet of described tube type resistance furnace 3 while guarantee roll 4 runs well as best one can near roll 4; thus to reduce from tube type resistance furnace 3 band out to the distance entering roll 4 and be rolled as far as possible, guarantee from tube type resistance furnace 3 out until the process sending into roll 4 is also carried out under protective atmosphere.Specifically when application drawing 1 shown device makes AgSnIn/Ag composite strip; first preheating tube type resistance furnace 3; then in tube type resistance furnace 3, protective gas is passed into; when temperature reaches temperature required; pure Ag band 2 is entered in tube type resistance furnace 3 with the AgSnIn alloy strip steel rolled stock 1 obtained and heats; entered in roll 4 by band out in tube type resistance furnace 3 and be rolled, the band of rolling gained carries out next step operation again after winder 5 rewinding.
Embodiment 1:AgSnO
2(9) In
2o
3(4) preparation of sheet electrical contact
1) Ag ingot, Sn ingot, In ingot, Ni block is taken respectively by following percentage by weight: 90.755wt%, 6.115wt%, 3.03wt%, 0.1wt%, for subsequent use;
2) Ag ingot is put into graphite crucible, be placed on intermediate frequency furnace with charcoal covering material and be warming up to 1100 DEG C, 5min is incubated under stirring condition, stirring is stopped to be cooled to 1050 DEG C afterwards, be sequentially added into Sn ingot, In ingot and Ni block, be warming up to 1150 DEG C, under stirring condition, be incubated 3min, stop stirring, drag for slag after leaving standstill 2min and be cast into circular ingot blank;
3) the circular ingot blank of gained is heated to 500 DEG C after turnery processing peeling and shrinkage cavity, using extruder to be squeezed into wide is the thick alloy strip steel rolled stock for 9mm of 20mm, undertaken cold rolling by the alloy strip steel rolled stock through extruding more afterwards, obtaining wide is the thick AgSnIn alloy strip steel rolled stock for 8.5mm of 20mm;
4) the pure Ag band that an and thickness identical with above-mentioned AgSnIn alloy strip steel rolled stock width is 0.8mm is prepared, for subsequent use;
5) device shown in Fig. 1 is adopted to carry out heating and method hot rolling pure Ag band and gained AgSnIn alloy strip steel rolled stock, arranging temperature in tube type resistance furnace is 500 DEG C, in tube type resistance furnace, pass into hydrogen and light a fire, pure Ag band and gained AgSnIn alloy strip steel rolled stock are sent in tube type resistance furnace and heats, entered in roll by tube type resistance furnace band out and carry out method hot rolling, controlled rolling speed is 8m/min, rolling reduction is 70%, obtain the AgSnIn/Ag composite strip that thickness is 2.80 ± 0.05mm, the winder rewinding of rolling band out;
6) gained AgSnIn/Ag composite strip is placed in vacuum furnace, and anneal 3h under 700 DEG C of conditions, then with cold-rolling mill by≤20%/time deflection to be rolled down to 0.9mm thick, again by above-mentioned condition annealing; Composite strip after annealing is carried out punch forming, obtains the sheet material that specification is 6mm × 6mm × 1mm (long × wide × thick, lower same);
7) resulting sheet loads stainless steel and burns boat, is placed in tubular type internal oxidition stove, 680 DEG C, partial pressure of oxygen is incubated 24h under being the condition of 0.9MPa, obtains the AgSnO of 6mm × 6mm × 1mm
2(9) In
2o
3(4) sheet electrical contact, as shown in Figure 2.
The AgSnO obtained by the present embodiment
2(9) In
2o
3(4) Metallographic Analysis is carried out after blade contact sample preparation, as shown in Figure 3.As seen from Figure 3, the metallographic structure of the blade contact prepared by the method for the invention is even, and slice oxide particle is distributed in Ag matrix in needle-like equably, AgSnO
2(9) In
2o
3(4) between layer and Ag layer without the good black boundary of non-compound, also abnormal structure nothing but.
Through calculating, prepare AgSnO by technique described in the present embodiment
2(9) In
2o
3(4) lumber recovery of sheet electrical contact is 35%.
Comparative example 1: prepare AgSnO by prior art
2(9) In
2o
3(4) sheet electrical contact
1) Ag ingot, Sn ingot, In ingot, Ni block is taken respectively by following percentage by weight: 90.755wt%, 6.115wt%, 3.03wt%, 0.1wt%, for subsequent use;
2) Ag ingot is put into graphite crucible, be placed on intermediate frequency furnace with charcoal covering material and be warming up to 1100 DEG C, 5min is incubated under stirring condition, stirring is stopped to be cooled to 1050 DEG C afterwards, be sequentially added into Sn ingot, In ingot and Ni block, be warming up to 1150 DEG C, under stirring condition, be incubated 3min, stop stirring, drag for slag after leaving standstill 2min and be cast into square ingot blank.
3) hot forging after epidermis and shrinkage cavity of being shootd off by ingot casting makes the slab of 85mm × 35mm × Lmm, steel slab surface is planed and polishes clean, carries out the multiple silver of hot rolling after its one side burn-ons one deck area equation 3.4mm fine silver plate.Hot-rolled temperature 700 DEG C, Reduction per draft is greater than 50%, and continuously hot rolling makes composite plate twice.Composite plate smoothed and removes blemish, being cold-rolled to 1mm punching or cut into the sheet of 6mm × 6mm × 1mm again.
3) blade contact is loaded stainless steel and burns boat, put into tubular type internal oxidition stove, 680 DEG C, carry out the internal oxidition process of about 24h under the condition of oxygen pressure 0.9MPa.The finally AgSnO containing Addition ofelements of obtained 6mm × 6mm × 1mm
2(9) In
2o
3(4) electrical contact.
Through calculating, prepare AgSnO by technique described in this comparative example
2(9) In
2o
3(4) lumber recovery of sheet electrical contact is 20%.
Embodiment 2:AgSnO
2(6) In
2o
3(4) preparation of sheet electrical contact
1) Ag ingot, Sn ingot, In ingot, Ni block is taken respectively by following percentage by weight: 91.5wt%, 4.7wt%, 3.3wt%, 0.5wt%, for subsequent use;
2) get Ag ingot and put into graphite crucible, be placed on intermediate frequency furnace with charcoal covering material and be warming up to 1150 DEG C, 5min is incubated under stirring condition, stirring is stopped to be cooled to 1000 DEG C afterwards, be sequentially added into Sn ingot, In ingot and AgNi (10) alloy, be warming up to 1100 DEG C, under stirring condition, be incubated 3min, stop stirring, drag for slag after leaving standstill 2min and be cast into circular ingot blank;
3) the circular ingot blank of gained is heated to 800 DEG C after turnery processing peeling and shrinkage cavity, using extruder to be squeezed into wide is the thick alloy strip steel rolled stock for 8mm of 10mm, undertaken cold rolling by the alloy strip steel rolled stock through extruding more afterwards, obtaining wide is the thick AgSnIn alloy strip steel rolled stock for 7mm of 11mm;
4) the pure Ag band that an and thickness identical with above-mentioned AgSnIn alloy strip steel rolled stock width is 2mm is prepared, for subsequent use;
5) device shown in Fig. 1 is adopted to carry out heating and method hot rolling pure Ag band and gained AgSnIn alloy strip steel rolled stock, arranging temperature in tube type resistance furnace is 800 DEG C, in tube type resistance furnace, pass into hydrogen and light a fire, pure Ag band and gained AgSnIn alloy strip steel rolled stock are sent in tube type resistance furnace and heats, entered in roll by tube type resistance furnace band out and carry out method hot rolling, controlled rolling speed is 10m/min, rolling reduction is 55%, obtain the AgSnIn/Ag composite strip that thickness is 4.05 ± 0.05mm, the winder rewinding of rolling band out;
6) gained AgSnIn/Ag composite strip is placed in vacuum furnace, and anneal 1.5h in atmosphere under 700 DEG C of conditions, then thick to 2mm with cold rolling mill, again by above-mentioned condition annealing; Composite strip after annealing is carried out punch forming, obtains the sheet material that specification is 12mm × 12mm × 2mm;
7) resulting sheet loads stainless steel and burns boat, is placed in tubular type internal oxidition stove, 800 DEG C, partial pressure of oxygen is incubated 48h under being the condition of 0.5MPa, obtains the AgSnO of 12mm × 12mm × 2mm
2(6) In
2o
3(4) sheet electrical contact.
Through calculating, prepare AgSnO by technique described in the present embodiment
2(6) In
2o
3(4) lumber recovery of sheet electrical contact is 38%.
Embodiment 3:AgSnO
2(7) In
2o
3(3) preparation of sheet electrical contact
1) Ag ingot, Sn ingot, In ingot, Cu ingot, Ni block is taken respectively by following percentage by weight: 91.5wt%, 5.5wt%, 2.5wt%, 0.2wt%, 0.3wt%, for subsequent use;
2) get Ag ingot and put into graphite crucible, be placed on intermediate frequency furnace with charcoal covering material and be warming up to 1200 DEG C, 5min is incubated under stirring condition, stirring is stopped to be cooled to 1020 DEG C afterwards, be sequentially added into Sn ingot, In ingot, Cu ingot and Ni block, be warming up to 1130 DEG C, under stirring condition, be incubated 3min, stop stirring, drag for slag after leaving standstill 5min and be cast into circular ingot blank;
3) the circular ingot blank of gained is heated to 700 DEG C after turnery processing peeling and shrinkage cavity, using extruder to be squeezed into wide is the thick alloy strip steel rolled stock for 10mm of 15mm, undertaken cold rolling by the alloy strip steel rolled stock through extruding more afterwards, obtaining wide is the thick AgSnIn alloy strip steel rolled stock for 9.5mm of 15mm;
4) the pure Ag band that an and thickness identical with above-mentioned AgSnIn alloy strip steel rolled stock width is 0.5mm is prepared, for subsequent use;
5) device shown in Fig. 1 is adopted to carry out heating and method hot rolling pure Ag band and gained AgSnIn alloy strip steel rolled stock, arranging temperature in tube type resistance furnace is 300 DEG C, hydrogen is passed into and pure Ag band and gained AgSnIn alloy strip steel rolled stock are sent in tube type resistance furnace and heated by igniting in tube type resistance furnace, entered in roll by tube type resistance furnace band out and carry out method hot rolling, controlled rolling speed is 5m/min, rolling reduction is 50%, obtain the AgSnIn/Ag composite strip that thickness is 5 ± 0.05mm, the winder rewinding of rolling band out;
6) gained AgSnIn/Ag composite strip is placed in vacuum furnace, and anneal 2h in atmosphere under 700 DEG C of conditions, then with cold-rolling mill by≤20%/time deflection to be rolled down to 3mm thick, again by above-mentioned condition annealing; Composite strip after annealing is carried out punch forming, obtains the sheet material that specification is φ 15mm × 3mm;
7) resulting sheet loads stainless steel and burns boat, is placed in tubular type internal oxidition stove, 550 DEG C, partial pressure of oxygen is incubated 60h under being the condition of 0.6MPa, obtains the AgSnO of φ 15mm × 3mm
2(7) In
2o
3(3) sheet electrical contact.
Through calculating, prepare AgSnO by technique described in the present embodiment
2(7) In
2o
3(3) lumber recovery of sheet electrical contact is 35%.
The various embodiments described above and the obtained electrical property of electrical contact material under A.C. contactor type approval test condition of comparative example 1 are detected, result as described in Table 1:
Table 1:
Claims (5)
1., containing a processing method for the silver-tin oxide or indium oxide sheet electrical contact of additive, it is characterized in that comprising the following steps:
1) consumption of silver, tin, indium and the additive needed for material mixture ratio calculating of the silver-tin oxide or indium oxide electrical contact prepared as required, takes for subsequent use; Described additive is nickel and/or copper;
2) get silver and be placed in melting in mid-frequency melting furnace, then add the tin, indium and the additive that take and continue melting, gained liquation is cast into circular ingot blank, and through the AgSnIn alloy strip steel rolled stock extruded, rolling process obtains certain specification;
3) get in pure Ag band and gained AgSnIn alloy strip steel rolled stock feeding tube type resistance furnace and heat, the temperature controlled in tube type resistance furnace is 300 ~ 800 DEG C; Send in roll afterwards and carry out method hot rolling, controlled rolling deflection is 50 ~ 70%, obtains AgSnIn/Ag composite strip; Wherein, after heating process in tube type resistance furnace of described AgSnIn alloy strip steel rolled stock and pure Ag band and this process until the process sending into roll is all carried out under protective atmosphere;
4) gained AgSnIn/Ag composite strip is through annealing, rolling, punch forming, obtains the sheet material of required specification;
5) resulting sheet carries out internal oxidition process, obtains the silver-tin oxide or indium oxide sheet electrical contact containing additive.
2. processing method according to claim 1, is characterized in that: step 3) in, the temperature controlled in tube type resistance furnace is 400 ~ 600 DEG C.
3. processing method according to claim 1, is characterized in that: step 3) in, controlled rolling deflection is 50 ~ 60%.
4. processing method according to claim 1, is characterized in that: step 3) in, during method hot rolling, controlled rolling speed is 5 ~ 10m/min.
5. the processing method according to any one of Claims 1 to 4, it is characterized in that: step 1) in, need in the silver-tin oxide or indium oxide electrical contact material of preparation, the content of additive accounts for 0.1 ~ 0.5wt%, the content of tin accounts for 4.7 ~ 8.5wt%, the content of indium accounts for 2.45 ~ 3.7wt%, and surplus is silver.
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| CN201511009689.5A CN105551838A (en) | 2015-12-29 | 2015-12-29 | Processing method for silver-tin oxide-indium oxide flake electrical contact containing additive |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112899519A (en) * | 2019-12-04 | 2021-06-04 | 西安西电高压开关有限责任公司 | Preparation method of silver-tin oxide composite board and contact |
| CN114438366A (en) * | 2021-12-28 | 2022-05-06 | 温州中希电工合金有限公司 | Preparation method of silver tin oxide indium oxide electric contact material |
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| CN112899519A (en) * | 2019-12-04 | 2021-06-04 | 西安西电高压开关有限责任公司 | Preparation method of silver-tin oxide composite board and contact |
| CN114438366A (en) * | 2021-12-28 | 2022-05-06 | 温州中希电工合金有限公司 | Preparation method of silver tin oxide indium oxide electric contact material |
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