CN103706795A - Preparation method of atomized silver and zinc oxide electrical contact materials containing additives - Google Patents
Preparation method of atomized silver and zinc oxide electrical contact materials containing additives Download PDFInfo
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- CN103706795A CN103706795A CN201310743059.5A CN201310743059A CN103706795A CN 103706795 A CN103706795 A CN 103706795A CN 201310743059 A CN201310743059 A CN 201310743059A CN 103706795 A CN103706795 A CN 103706795A
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Abstract
The invention discloses a manufacturing method of atomized silver and zinc oxide electrical contact materials containing additives. The method comprises the following steps that (1), according to the material ratio of silver and zinc oxide electrical contacts needing preparing, the dosages of needed pure silver blocks, needed pure zinc blocks and needed salt-class compounds containing the additives are calculated, and the needed pure silver blocks, and the needed pure zinc blocks and the needed salt-class compounds containing the additives are weighed for the standby; (2), the pure silver blocks and the pure zinc blocks are atomized to be silver and zinc alloy powder; (3), the salt-class compounds containing the additives are prepared to form a water solution or an ethyl alcohol solution, the silver and zinc alloy power is added into the solution to be mixed, and silver and zinc alloy powder slurry with the salt-class compounds containing the additives evenly distributed is obtained; (4), the slurry is dried and smashed, and silver and zinc alloy powder with the salt-class compounds containing the additives evenly distributed is obtained; (5), pre-oxidation processing, isostatic pressing formation, sintering and extrusion are carried out on the alloy powder so as to obtain the atomized silver and zinc oxide electrical contact materials containing the additives. The method well solves the problem of segregation of the additives caused by a traditional atomization and power mixing process, and improves the degree of densification, the processing performance, the material yield and the electrical property of the materials.
Description
Technical field
The present invention relates to metal-base composites field, be specifically related to a kind of preparation method containing additive atomization silver zinc oxide electrical contact material.
Background technology
Agcdo (AgCdO), as contact material, has good combination property, is of wide application, and the applicating history of existing decades.But Cd steam is poisonous, to environment.In recent years, many countries have all carried out the research for Cd material.Ag-ZnO (AgZnO) is developed recently a kind of Novel non-toxic electrical contact material faster, AgZnO contact material heat endurance is higher than CdO, fusing point is 1795 ℃, so AgZnO has the features such as good resistance fusion welding, good resistance to arc erosion, low and stable contact resistance, easy welding.AgZnO contact material electrical property approaches AgCdO simultaneously, is the first-selection of 3000A-5000A low-voltage electrical apparatus environmental protection contact material.But the contact resistance of AgZnO contact material is larger, temperature rise, has a strong impact on electric serviceability, limits the application of its material.
Find after deliberation, add the AgZnO electrical contact material of additive to have good resistance fusion welding, the kind of additive mainly contains WO at present
3, Bi
2o
3, CuO, In
2o
3, RE oxide, GeO
2deng material, the additive mode that mainly adds has three kinds of techniques: powder mixing method, internal oxidation, chemical method.Wherein powder mixing method is that Ag powder, ZnO and additive agent powder powder are fully mixed, then material pushes or is molded into AgZnO contact material, wherein additive adds in the powder mode of mixing mutually, this method is due to features such as preparation method are simple, the process-cycle is short, by manufacturer, generally adopted, but the electric usability of the product preparing is not high, easily occurs the problems such as additive segregation, can only be applicable to the low side electrical equipment that ask for something is not high.Internal oxidation is prepared into alloy wire or sheet material after referring to Ag, Zn, additive fusing, then by internal oxidation process, be prepared into the AgZnO contact material containing additive, but " poor oxide region " easily appears in existing internal oxidation technique, affect the electric life of gained contact material.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of preparation method containing additive atomization silver zinc oxide electrical contact material.The method joins the silver-colored Zinc alloy powder of atomization gained in the aqueous solution or ethanolic solution that contains the salt compounds that adds element, through wet mixing, after dry, carry out pre-oxidation treatment, in pre-oxidation treatment process, containing the salt compounds that adds element, resolve into corresponding metal oxide, and decompose the surface that the metal oxide obtaining is attached to Ag-ZnO particle equably, improve traditional atomization process and can not add high-melting-point additive, and the problem such as additive segregation.
Preparation method containing additive atomization silver zinc oxide electrical contact material of the present invention, comprises the following steps:
1) material mixture ratio of the silver zinc oxide electrical contact of preparing as required calculates required fine silver piece, pure spelter and contains the consumption of the salt compounds that adds element, takes standby; Wherein, the described salt compounds containing adding element is one or more the combination in ammonium molybdate, ammonium metatungstate, copper nitrate, nitric acid germanium, lithium nitrate and lanthanide rare nitrate;
2) get fine silver piece and pure spelter and be placed in mid-frequency melting furnace and be smelted into uniform alloy molten solution, through atomization, make silver-colored Zinc alloy powder;
3) get containing the salt compounds water or the anhydrous alcohol solution that add element and be made into the aqueous solution or ethanolic solution, add silver-colored Zinc alloy powder, carry out mixing treatment, obtain containing adding the equally distributed silver-colored Zinc alloy powder slurry of element salt compounds;
4) by containing adding the equally distributed silver-colored Zinc alloy powder slurry drying of element salt compounds, pulverize, obtain containing adding the equally distributed silver-colored Zinc alloy powder of element salt compounds;
5) by carrying out pre-oxidation treatment containing adding the equally distributed silver-colored Zinc alloy powder of element salt compounds, then through isostatic compaction, sintering, extrusion process, obtain silver zinc oxide electrical contact material.
In above-mentioned preparation method,
Step 1) in, need in the silver zinc oxide electrical contact material of preparation, zinc oxide content is 8～20wt%, and it is 0.5～5wt% that additive be take containing its total content of oxide that adds element, and surplus is silver.The described salt compounds containing adding element can be decomposed into respectively containing the oxide that adds element in the sintering circuit of postorder, concrete: ammonium molybdate is decomposed into molybdenum oxide, ammonium metatungstate and is decomposed into tungsten oxide, copper nitrate and is decomposed into that cupric oxide, nitric acid germanium are decomposed into germanium oxide, lithium nitrate is decomposed into lithia, and described lanthanide rare nitrate can be erbium nitrate, lanthanum nitrate, cerous nitrate etc., they are broken down into respectively lanthanide rare metal oxide as erbium oxide, lanthana, cerium oxide etc. in sintering process.Above-mentioned lanthanide rare nitrate is preferably made into ethanolic solution with anhydrous alcohol solution, and other except lanthanide rare nitrate dissolves and be made into the aqueous solution containing the common water of the salt compounds that adds element.In the end, in the silver zinc oxide electrical contact material of gained, should control 0.5～5wt% that the above-mentioned various total amount containing adding the oxide of element or any two or more combination in them accounts for silver zinc oxide electrical contact material.
Step 1), in, can replace ammonium metatungstate with ammonium paratungstate.
Step 2) in, alloy molten solution obtains silver-colored Zinc alloy powder slurry through atomization, this slurry drying, obtains silver-colored Zinc alloy powder after sieving, and normally dried material is crossed to 100 mesh sieves, preferably cross after 200～300 mesh sieves, extracting screen underflow is for next procedure.
Step 3) in, when the salt compounds containing adding element is added to water or ethanol and is made into the aqueous solution or ethanolic solution, what the consumption of water or ethanol was too not large is particular about, and the consumption of water or ethanol can dissolve containing the salt compounds that adds element conventionally.Preferably, after being made into the aqueous solution or ethanolic solution, when silver-colored Zinc alloy powder is added wherein, the aqueous solution or ethanolic solution should not crossed silver-colored Zinc alloy powder.In this step, conventionally adopt low-speed mixer to carry out mixing treatment, the time of batch mixing is 0.25～3h, and revolution is 20～40r/min.
Step 4) in, described being dried carried out conventionally under 80～200 ℃ of conditions, until will dry containing adding the equally distributed silver-colored Zinc alloy powder slurry of element salt compounds, conventionally needs the time of 5～10h.Normally by after dried crushing material, at least cross 100 mesh sieves, extracting screen underflow enters next process.
Step 5) in, described pre-oxidation treatment is carried out under 600～800 ℃ of conditions, and the time is 5～10h.Isostatic compaction described in this step, sintering, hot extrusion operate identical with existing common process, and particularly, hydrostatic pressing pressure is generally 100～300Mpa; The temperature of sintering is generally 730～950 ℃, and the time of sintering is 5～10h; The temperature of hot extrusion is generally 800～900 ℃, and extrusion ratio is 200～250.In this step, after extruding obtains Ag-ZnO wire rod or band, by wire rod, drawing process carries out drawing routinely, to be machined to required size be that available rivet driver is processed into Ag-ZnO integral body or the composite rivet contact containing additive in annealing; By gained strip-rolling, after the size needing, punch forming obtains the Ag-ZnO sheet contact material of dimension; Or compound with copper strip hot rolling, anneal and be rolled down to after required size the Ag-ZnO sheet contact that can punch forming must cover copper.
Compared with prior art, feature of the present invention is:
1, the method joins additive in matrix in special mode, the silver-colored Zinc alloy powder that is about to atomization gained joins in the aqueous solution or ethanolic solution that contains the salt compounds that adds element, through wet mixing, after dry, carry out pre-oxidation treatment, in pre-oxidation treatment process, containing the salt compounds that adds element, resolve into corresponding metal oxide, and decompose the surface that the metal oxide obtaining is attached to Ag-ZnO particle equably, improved form additive in traditional blending processes of powders and with powder type, added the additive segregation phenomena causing.
2, the method technique is simple, and cost is low, and the process-cycle is short, and composing environment does not pollute, and is applicable to producing in enormous quantities.
Accompanying drawing explanation
Fig. 1 is the electron-microscope scanning figure of the prepared silver zinc oxide electrical contact material of the embodiment of the present invention 3; Wherein 1 represents that region 1,2 represents that region 2,3 represents region 3;
Fig. 2 is the electron-microscope scanning figure of the prepared silver zinc oxide electrical contact material of the embodiment of the present invention 4; Wherein 1 represents that region 1,2 represents that region 2,3 represents region 3.
The specific embodiment
With specific embodiment, the invention will be further described below, but the present invention is not limited to these embodiment.
The fine silver piece of using in following embodiment and the purity of pure spelter all >=99.95% (mass percent)
Embodiment 1
1) according to the Ag-8ZnO-5Er of preparation 10kg
2o
3material mixture ratio calculates each raw material consumption, takes fine silver piece 10kg, pure spelter 0.736kg, erbium nitrate 1.16kg, standby;
2) get fine silver piece and pure spelter and be placed in mid-frequency melting furnace and be smelted into uniform alloy molten solution, through hydraulic atomized equipment, carry out atomization, the powder slurries obtaining is dried, cross 100 mesh sieves, obtain silver-colored Zinc alloy powder;
3) get erbium nitrate 3L anhydrous alcohol solution, be made into the ethanolic solution of erbium nitrate, add 9.34kg silver Zinc alloy powder, gained slurry carries out mixing treatment with low-speed mixer, and (time is 2h, revolution is 30r/min), obtain the equally distributed silver-colored Zinc alloy powder slurry of erbium nitrate;
4) by the equally distributed silver-colored Zinc alloy powder slurry of erbium nitrate dry 5h at 80 ℃, by disintegrating machine, carry out fragmentation, broken powder is sieved after (crossing 160 mesh sieves), obtain the equally distributed silver-colored Zinc alloy powder of erbium nitrate;
5) by the equally distributed silver-colored Zinc alloy powder of erbium nitrate in air in 600 ℃ of pre-oxidation pre-oxidation 8h (erbium nitrate resolves into erbium oxide in this process), obtain the equally distributed Ag-ZnO mixed powder of erbium oxide;
6) by the Ag-ZnO mixed powder of gained, waiting static pressure pressure, be to be pressed into base substrate under 150MPa, gained base substrate under air in 900 ℃ of sintering 6h, at 850 ℃, be squeezed into wire rod, extrusion ratio is 200, wire rod more routinely drawing process carry out drawing and be machined to required size.
Embodiment 2
1) according to the Ag-10ZnO-1.5CuO-1Mo of preparation 10kg
2o
3-0.5La
2o
3material mixture ratio calculates each raw material consumption, takes fine silver piece 10kg, pure spelter 0.92kg, copper nitrate 0.454kg, ammonium molybdate 0.136kg, lanthanum nitrate 0.133kg, standby;
2) get fine silver piece and pure spelter and be placed in mid-frequency melting furnace and be smelted into uniform alloy molten solution, through hydraulic atomized equipment, carry out atomization, the powder slurries obtaining is dried, cross 100 mesh sieves, obtain silver-colored Zinc alloy powder;
3) get copper nitrate, lanthanum nitrate, the water-soluble solution of 2L for ammonium molybdate, be made into the aqueous solution of copper nitrate, ammonium molybdate and lanthanum nitrate, add 9.5kg silver Zinc alloy powder, gained slurry carries out mixing treatment with low-speed mixer, and (time is 2h, revolution is 30r/min), obtain the equally distributed silver-colored Zinc alloy powder slurry of copper nitrate, ammonium molybdate and lanthanum nitrate;
4) by the equally distributed silver-colored Zinc alloy powder slurry of copper nitrate, ammonium molybdate and lanthanum nitrate dry 5h at 110 ℃, by disintegrating machine, carry out fragmentation, broken powder is sieved after (crossing 100 mesh sieves), obtain the equally distributed silver-colored Zinc alloy powder of copper nitrate, ammonium molybdate and lanthanum nitrate;
5) by the equally distributed silver-colored Zinc alloy powder of copper nitrate, ammonium molybdate and lanthanum nitrate in air in 600 ℃ of pre-oxidation pre-oxidation 7h (copper nitrate, ammonium molybdate and lanthanum nitrate resolve into respectively cupric oxide, molybdenum oxide and lanthana in this process), obtain the equally distributed Ag-ZnO mixed powder of cupric oxide, molybdenum oxide and lanthana;
6) by the Ag-ZnO mixed powder of gained, waiting static pressure pressure, be to be pressed into base substrate under 200MPa, gained base substrate under air in 800 ℃ of sintering 5h, at 880 ℃, be squeezed into wire rod, extrusion ratio is 200, wire rod more routinely drawing process carry out drawing and be machined to required size.
Embodiment 3
1) according to the Ag-12ZnO-2WO of preparation 10kg
3-0.5Li
2o
3material mixture ratio calculates each raw material consumption, takes fine silver piece 10kg, pure spelter 1.12kg, ammonium metatungstate 0.209kg, lithium nitrate 0.23kg, standby;
2) get fine silver piece and pure spelter and be placed in mid-frequency melting furnace and be smelted into uniform alloy molten solution, through hydraulic atomized equipment, carry out atomization, the powder slurries obtaining is dried, cross 200 mesh sieves, obtain silver-colored Zinc alloy powder;
3) get the water-soluble solution of 3L for ammonium metatungstate and lithium nitrate, be made into the aqueous solution of ammonium metatungstate and lithium nitrate, add 9.51kg silver Zinc alloy powder, gained slurry carries out mixing treatment with low-speed mixer, and (time is 1h, revolution is 30r/min), obtain the equally distributed silver-colored Zinc alloy powder slurry of ammonium metatungstate and lithium nitrate;
4) the dry 10h at 110 ℃ by ammonium metatungstate and the equally distributed silver-colored Zinc alloy powder slurry of lithium nitrate, by disintegrating machine, carry out fragmentation, broken powder is sieved after (crossing 100 mesh sieves), obtain the equally distributed silver-colored Zinc alloy powder of ammonium metatungstate and lithium nitrate;
5) by ammonium metatungstate and the equally distributed silver-colored Zinc alloy powder of lithium nitrate in air in 700 ℃ of pre-oxidation pre-oxidation 10h (ammonium metatungstate and lithium nitrate resolve into respectively tungsten oxide and lithia in this process), obtain containing tungsten oxide and the equally distributed Ag-ZnO mixed powder of lithia;
6) by the Ag-ZnO mixed powder of gained, waiting static pressure pressure, be to be pressed into base substrate under 150MPa, gained base substrate under air in 750 ℃ of sintering 10h, at 850 ℃, be squeezed into wire rod, extrusion ratio is 200, wire rod more routinely drawing process carry out drawing be processed into φ 1.40mm silk material.。
For the tungsten oxide of checking interpolation and the distributing homogeneity of lithia, the Ag-12ZnO-2WO to gained
3-0.5Li
2o
3silk material carries out the analysis of sector scanning electro microscope energy spectrum, specifically as shown in Figure 1.In Fig. 1, appoint and get three regions (region 1, region 2 and region 3) and carry out elemental composition analysis, result as described in Table 1.
The trizonal sem energy spectrum analysis of table 1 (percentage by weight)
| ? | Ag | Zn | W | Li |
| Region 1 | 85.1% | 11.2% | 1.9% | 0.4% |
| Region 2 | 85.9% | 11.8% | 1.5% | 0.4% |
| Region 3 | 86.1% | 11.5% | 1.7% | 0.4% |
From Fig. 1 associative list 1, additive WO
3and Li
2o
3in matrix, be evenly distributed, component content meets the requirements.
Embodiment 4
1) according to the Ag-14.5ZnO-0.5In of preparation 10kg
2o
3-0.5WO
3-0.5CeO
2material, proportioning is calculated each raw material consumption, takes fine silver piece 10kg, pure spelter 1.38kg, indium nitrate 0.108kg, ammonium metatungstate 0.052kg, cerous nitrate 0.126kg, standby;
2) get fine silver piece and pure spelter and be placed in mid-frequency melting furnace and be smelted into uniform alloy molten solution, through hydraulic atomized equipment, carry out atomization, the powder slurries obtaining is dried, cross 100 mesh sieves, obtain silver-colored Zinc alloy powder;
3) get the water-soluble solution of 2L for indium nitrate, ammonium metatungstate and cerous nitrate, be made into the aqueous solution of indium nitrate, ammonium metatungstate and cerous nitrate, add 9.56kg silver Zinc alloy powder, gained slurry carries out mixing treatment with low-speed mixer, and (time is 0.5h, revolution is 40r/min), obtain the equally distributed silver-colored Zinc alloy powder slurry of indium nitrate, ammonium metatungstate and cerous nitrate;
4) by the equally distributed silver-colored Zinc alloy powder slurry of indium nitrate, ammonium metatungstate and cerous nitrate dry 10h at 120 ℃, by disintegrating machine, carry out fragmentation, broken powder is sieved after (crossing 200 mesh sieves), obtain the equally distributed silver-colored Zinc alloy powder of indium nitrate, ammonium metatungstate and cerous nitrate;
5) by the equally distributed silver-colored Zinc alloy powder of indium nitrate, ammonium metatungstate and cerous nitrate in air in 700 ℃ of pre-oxidation pre-oxidation 7h (indium nitrate, ammonium metatungstate and cerous nitrate resolve into respectively indium oxide, tungsten oxide and cerium oxide in this process), obtain the equally distributed Ag-ZnO mixed powder of indium oxide, tungsten oxide and cerium oxide;
6) by the Ag-ZnO mixed powder of gained, waiting static pressure pressure, be to be pressed into base substrate under 300MPa, gained base substrate under air in 930 ℃ of sintering 8h, at 800 ℃, be squeezed into wire rod, extrusion ratio is 250, wire rod more routinely drawing process carry out drawing and be processed into φ 1.40mm wire rod.
For the oxide distributing homogeneity that checking is added, the Ag-14.5ZnO-0.5In to gained
2o
3-0.5WO
3-0.5CeO
2silk material carries out the analysis of sector scanning electro microscope energy spectrum, specifically as shown in Figure 2.In Fig. 2, appoint and get three regions (region 1, region 2 and region 3) and carry out elemental composition analysis, result as described in Table 2.
The trizonal sem energy spectrum analysis of table 2 (percentage by weight)
| ? | Ag | Zn | In | W | Ce |
| Region 1 | 84.31% | 13.21% | 0.51% | 0.48% | 0.52% |
| Region 2 | 83.32% | 14.15% | 0.49% | 0.50% | 0.41% |
| Region 3 | 82.95% | 14.86% | 0.44% | 0.47% | 0.43% |
From Fig. 2 associative list 2, additive cupric oxide, cerium oxide and lanthana are evenly distributed in matrix, and component content meets the requirements.
Comparative example
1) contrast test condition is consistent with embodiment 4 contact silver contents for guaranteeing, take 8.4kg fine silver ingot and 1.28kg pure zinc ingot, be placed in and in mid-frequency melting furnace, be smelted into uniform alloy molten solution, then through hydraulic atomized equipment, carry out atomization, the powder slurries obtaining is dried, cross 200 mesh sieves, obtain silver-colored Zinc alloy powder;
2) silver-colored ashbury metal powder in air under 700 ℃ of conditions pre-oxidation 7h;
3) remaining step is by 5 in above-described embodiment 4), 6) same process is prepared into AgZnO (16) wire rod of φ 1.40mm.
It is 3 * 0.8+1.5 * 1.5(unit that φ 1.40mm wire rod prepared by embodiment 4, comparative example is processed into respectively specification: integral rivet type contact mm), be assemblied on contact simulation of electrical performance testing machine, under 220VAC, 25A, resistive load condition, carry out electrical contact endurance contrast test, every kind of material is tested three pairs of contacts simultaneously, and result of the test is in Table 3.
The electric life of the AgZnO rivet type contact of table 3 embodiment 4 and comparative example 1 preparation
Result of the test by table 3 can find out, under identical experimental condition, silver content composition is identical, and the material of preparing with comparative example is compared, the Ag-14.5ZnO-0.5In of embodiment 4 preparations
2o
3-0.5WO
3-0.5CeO
2material not only has higher electric life, and electric life fluctuation is less, shows to adopt the additive A gZnO contact material that contains prepared by method of the present invention to have better and stable electric property.
Embodiment 5
1) according to the Ag-20ZnO-1CeO of preparation 10kg
2material mixture ratio calculates each raw material consumption, takes fine silver piece 10kg, pure spelter 2.03kg, cerous nitrate 0.252kg, standby;
2) get fine silver piece and pure spelter and be placed in mid-frequency melting furnace and be smelted into uniform alloy molten solution, through hydraulic atomized equipment, carry out atomization, the powder slurries obtaining is dried, cross 100 mesh sieves, obtain silver-colored Zinc alloy powder;
3) get cerous nitrate 1L anhydrous alcohol solution, be made into the ethanolic solution of cerous nitrate, add 9.5kg silver Zinc alloy powder, gained slurry carries out mixing treatment with low-speed mixer, and (time is 2h, revolution is 20r/min), obtain the equally distributed silver-colored Zinc alloy powder slurry of cerous nitrate;
4) by the equally distributed silver-colored Zinc alloy powder slurry of cerous nitrate dry 5h at 100 ℃, by disintegrating machine, carry out fragmentation, broken powder is sieved after (crossing 100 mesh sieves), obtain the equally distributed silver-colored Zinc alloy powder of cerous nitrate;
5) by the equally distributed silver-colored Zinc alloy powder of cerous nitrate in air in 600 ℃ of pre-oxidation pre-oxidation 8h (cerous nitrate resolves into cerium oxide in this process), obtain the equally distributed Ag-ZnO mixed powder of cerium oxide;
6) by the Ag-ZnO mixed powder of gained, waiting static pressure pressure, be to be pressed into base substrate under 150MPa, gained base substrate under air in 940 ℃ of sintering 6h, at 850 ℃, be squeezed into wire rod, extrusion ratio is 200, wire rod more routinely drawing process carry out drawing and be machined to required size.
Claims (5)
1. containing a preparation method for additive atomization silver zinc oxide electrical contact material, comprise the following steps:
1) material mixture ratio of the silver zinc oxide electrical contact of preparing as required calculates required fine silver piece, pure spelter and contains the consumption of the salt compounds that adds element, takes standby; Wherein, the described salt compounds containing adding element is one or more the combination in ammonium molybdate, ammonium metatungstate, copper nitrate, nitric acid germanium, lithium nitrate and lanthanide rare nitrate;
2) get fine silver piece and pure spelter and be placed in mid-frequency melting furnace and be smelted into uniform alloy molten solution, through atomization, make silver-colored Zinc alloy powder;
3) get containing the salt compounds water or the anhydrous alcohol solution that add element and be made into the aqueous solution or ethanolic solution, add silver-colored Zinc alloy powder, carry out mixing treatment, obtain containing adding the equally distributed silver-colored Zinc alloy powder slurry of element salt compounds;
4) by containing adding the equally distributed silver-colored Zinc alloy powder slurry drying of element salt compounds, pulverize, must be containing adding the equally distributed silver-colored Zinc alloy powder of element salt compounds;
5) by carrying out pre-oxidation treatment containing adding the equally distributed silver-colored Zinc alloy powder of element salt compounds, then through isostatic compaction, sintering, extrusion process, obtain silver zinc oxide electrical contact material.
2. the preparation method containing additive atomization silver zinc oxide electrical contact material according to claim 1, it is characterized in that: step 1) in, need in the silver zinc oxide electrical contact material of preparation, zinc oxide content is 8～20wt%, it is 0.5～5wt% that additive be take containing its total content of oxide that adds element, and surplus is silver.
3. the preparation method containing additive atomization silver zinc oxide electrical contact material according to claim 1, it is characterized in that: step 5) in, in pre-oxidation treatment process, containing the salt compounds generation thermal decomposition of adding element, generate corresponding oxide, finally obtain containing the atomization silver zinc oxide electrical contact material that adds the oxide addition of element.
4. the preparation method containing additive atomization silver zinc oxide electrical contact material according to claim 1, is characterized in that: step 5) in, described pre-oxidation treatment is carried out under 600～800 ℃ of conditions, and the time is 5～10h.
5. according to the preparation method containing additive atomization silver zinc oxide electrical contact material described in any one in claim 1～4, it is characterized in that: step 1) in, with ammonium paratungstate, replace ammonium metatungstate.
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| CN104493178A (en) * | 2014-12-30 | 2015-04-08 | 桂林电器科学研究院有限公司 | Processing method of silver zinc oxide electric contact material containing additive |
| CN104593633A (en) * | 2014-12-30 | 2015-05-06 | 桂林电器科学研究院有限公司 | Preparation method of additive-containing silver zinc oxide electrical contact material |
| CN112725652A (en) * | 2020-12-24 | 2021-04-30 | 福达合金材料股份有限公司 | Silver zinc oxide electric contact material and preparation method thereof |
| CN113957282A (en) * | 2021-10-25 | 2022-01-21 | 哈尔滨工业大学 | Preparation method of metal ion doped modified silver zinc oxide electrical contact material |
| CN114907111A (en) * | 2022-05-07 | 2022-08-16 | 吉林昱丰电气科技有限公司 | High-energy high-residual-voltage-ratio nonlinear device and preparation method thereof |
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