CN103579489A - Preparation method of metallic conductor electrode for thermoelectric generator - Google Patents
Preparation method of metallic conductor electrode for thermoelectric generator Download PDFInfo
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- CN103579489A CN103579489A CN201310541100.0A CN201310541100A CN103579489A CN 103579489 A CN103579489 A CN 103579489A CN 201310541100 A CN201310541100 A CN 201310541100A CN 103579489 A CN103579489 A CN 103579489A
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Abstract
The invention relates to a preparation method of a metallic conductor electrode for a thermoelectric generator. According to the preparation method, a base powder material and an intensified granular material are respectively ground, screened and mixed, the ground, screened and mixed intensified granular material is placed in a mould, then the base powder material is placed into the mould to be pressed, and a current-guiding electrode rough blank for the thermoelectric generator is prepared in a pressing mode according to the steps; the pressed metallic conductor electrode for the thermoelectric generator is taken out, and then sintering, heat preservation, annealing, cooling and extrusion are carried out on the metallic conductor electrode for the thermoelectric generator under sealed and oxygen-free conditions, and finally the metallic conductor electrode for the thermoelectric generator is formed.
Description
Technical field
The invention belongs to thermo-electric generation technical field, particularly relate to the preparation method of metallic conductor electrode for a kind of thermoelectric generator.
Background technology
Thermoelectric generator is to utilize Seebeck effect, in hot junction and cold junction, with metallic conductor electrode, thermoelement is coupled together, and utilizes the temperature difference, heat energy is directly changed into a kind of power generating device of electric energy.The metallic conductor electrode that tradition thermoelectric generator is used generally adopts single crystal growth technique to prepare, as metal materials such as the Fe with single, Cu, Ni, its shortcoming is: welding resistance is large, and weld strength is not high, if the hot-face temperature of thermoelectric generator is too high, welding point easily comes off, the sublimation rate of some thermoelectric material also sharply increases, and very easily causes that thermoelectric generator lost efficacy, and this is also that the conversion efficiency of thermoelectric generator is low, decay is fast, one of reason that the life-span is short.
Summary of the invention
The object of the invention is to adopt polycrystalline or directed polycrystalline material on existing thermoelectric material basis, propose improvement project, with being pulverized and mixed sintering (PIES) Fa Hequ, melting smelting process and obtain the thermoelectric material that the figure of merit is high.It has, and welding resistance is little, and weld strength is high, and welding wettability is good, and the life-span is long, has the advantages such as higher Seebeck coefficient and conductivity.
The present invention realizes by the following technical solutions:
A preparation method for metallic conductor electrode for thermoelectric generator,
(1) matrix powder material and reinforcing particle active material are ground respectively, sieved, mix;
2) grinding, the mixed reinforcing particle material that sieves are put into mould, then put into matrix powder material and suppress, order is pressed into the described thick embryo of flow guiding electrode for temperature difference generator according to this;
(3) take out the thermoelectric generator metallic conductor electrode after compacting, under the condition of sealing deoxygenation, carry out sintering, insulation, annealing, cooling again, extruding, becomes final thermoelectric generator metallic conductor electrode.
Solid metallic and reinforcing material, in little plastic deformation situation, by higher temperature and pressure, make between composition material between contacting section atom diffusion bonding mutually form.Mixed-powder and anti-oxidation are the keys of technique
The present invention adopts following technical measures to realize:
Described sintering process is carried out in protective gas.
Described protective gas is that Ar: H2 is the mist of 1: 1.
Described sintering, insulation, annealing, cooling, the number of times at least twice of extruding.
The manufacture method of metallic conductor electrode for thermoelectric generator; described at least twice sintering, insulation, annealing, cooling after; be warming up to again required sintering temperature; after insulation, cooling with stove, and then carry out intermediate sintering temperature one time; after intermediate sintering temperature; again metallic conductor electrode is put into graphite and pour protective gas, be warming up to required annealing temperature, cooling with stove after insulation.
Described annealing temperature is 800～1100 ℃, and annealing time is half an hour.
The beneficial effect that the present invention has is: reinforcing particle has added Al, can play toughening effect, and has improved metallic conductor high-temperature oxidation resistance, and after dispersion-strengtherning, intensity, the hardness of copper are greatly improved, and conductivity reduces few.And material adopted grinding, sieved, improved the compactness of electrode, increased the wetability of scolder between material and metallic conductor electrode, reduced welding resistance; Owing to having adopted matrix powder and having crossed the method for reinforcing particle layers of material compacting, even tissue, crystal grain is tiny, there is no segregation, and heat treatment deformation is little, and increase useful life.
Embodiment
Use a metallic conductor electrode, matrix powder material and reinforcing particle layers of material is compressed together; Described matrix powder material is single metal dust, and described reinforcing particle material is one or both and above metal or non-metal powder mixture.
Described matrix powder material is Fe powder, Cu powder, Ni powder; Described reinforcing particle material is a kind of in SPbTe powder, graphite powder, tungsten powder and Al powder or described matrix powder material and SnTe powder, tungsten powder, graphite powder, one or more mixture in powder and Al powder, in described flow guiding electrode, matrix powder material content is 60～80%, and in described flow guiding electrode, reinforcing particle material content is 20～40%.
Described reinforcing particle material PbTe: Cu: Ge: Al percentage by weight is 10～50%: 20～30%: 10～15%: 10～50%.
Embodiment
First will be by reinforcing particle material PbTe: Cu: Ge: Al percentage by weight is 10～50%: 20～30%: 10～15%: 10～50% put into former, rap former, reinforcing particle material can be laid in former uniformly, pressure head is put into former, and then former is placed on backing plate, give slightly a little bit smaller pressure of pressure head, pressure is 35-50Mpa, pressurize 5 seconds, then pressure head is taken out, again load weighted basis material is put into former, rap former, basis material is laid on reinforcing particle material uniformly, again former is placed on backing plate, give the certain pressure of pressure head, pressure is 550-650Mpa, pressurize 30 seconds, again former is taken off from backing plate, be placed on blanking frame, carry out the demoulding to again certain pressure, whole like this pressing process finishes.After compacting finishes, suppressed conductor electrode be carried out to multiple high temp sintering, for guaranteeing that in sintering process, flow guiding electrode is not oxidized, whole sintering process will be carried out in protective gas.First conductor electrode is put into quartz ampoule, vacuumize, then pour Ar: H2=1: 1 mist, after three times, is warming up to 800～1100 ℃ and carries out sintering so back and forth, then insulation cooling with stove.And then carry out intermediate sintering temperature one time, and to reduce the internal stress in high-temperature sintering process, the conductor electrode after sintering is put into graphite and pour protective gas, be warming up to 500～800 ℃ and anneal, insulation is cold with stove after half an hour.So just made our required conductor electrode.
Claims (6)
1. a preparation method for metallic conductor electrode for thermoelectric generator, is characterized in that:
(1) matrix powder material and reinforcing particle active material are ground respectively, sieved, mix;
2) grinding, the mixed reinforcing particle material that sieves are put into mould, then put into matrix powder material and suppress, order is pressed into the described thick embryo of flow guiding electrode for temperature difference generator according to this;
(3) take out the thermoelectric generator metallic conductor electrode after compacting, under the condition of sealing deoxygenation, carry out sintering, insulation, annealing, cooling again, extruding, becomes final thermoelectric generator metallic conductor electrode.
2. the preparation method of metallic conductor electrode for thermoelectric generator according to claim 1, is characterized in that: described sintering process is carried out in protective gas.
3. the preparation method of metallic conductor electrode for thermoelectric generator according to claim 2, is characterized in that: described protective gas is that Ar: H2 is the mist of 1: 1.
4. the preparation method of metallic conductor electrode for thermoelectric generator according to claim 1, is characterized in that: described sintering, insulation, annealing, cooling, the number of times at least twice of extruding.
5. according to the thermoelectric generator described in claim 1 or 4, use the preparation method of metallic conductor electrode; it is characterized in that: the manufacture method of metallic conductor electrode for thermoelectric generator; described at least twice sintering, insulation, annealing, cooling after, then be warming up to required sintering temperature, after insulation; cooling with stove; and then carry out intermediate sintering temperature one time, after intermediate sintering temperature, then metallic conductor electrode is put into graphite and pour protective gas; be warming up to required annealing temperature, cooling with stove after insulation.
6. the preparation method of metallic conductor electrode for thermoelectric generator according to claim 1 or 5, is characterized in that: described annealing temperature is 800～1100 ℃, and annealing time is half an hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310541100.0A CN103579489A (en) | 2013-11-05 | 2013-11-05 | Preparation method of metallic conductor electrode for thermoelectric generator |
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| CN201310541100.0A CN103579489A (en) | 2013-11-05 | 2013-11-05 | Preparation method of metallic conductor electrode for thermoelectric generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579483A (en) * | 2013-11-05 | 2014-02-12 | 姚芸 | Metallic conductor electrode for thermoelectric generator and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790763A (en) * | 2004-12-14 | 2006-06-21 | 中国电子科技集团公司第十八研究所 | Flow guiding electrode for temperature difference generator and its preparing method |
| JP2012522380A (en) * | 2009-03-26 | 2012-09-20 | コーニング インコーポレイテッド | Thermoelectric conversion element, electrode material and manufacturing method thereof |
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- 2013-11-05 CN CN201310541100.0A patent/CN103579489A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1790763A (en) * | 2004-12-14 | 2006-06-21 | 中国电子科技集团公司第十八研究所 | Flow guiding electrode for temperature difference generator and its preparing method |
| JP2012522380A (en) * | 2009-03-26 | 2012-09-20 | コーニング インコーポレイテッド | Thermoelectric conversion element, electrode material and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579483A (en) * | 2013-11-05 | 2014-02-12 | 姚芸 | Metallic conductor electrode for thermoelectric generator and preparation method thereof |
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Application publication date: 20140212 |