WO2017082578A1 - P 형 스커테루다이트 열전재료, 이의 제조 방법 및 이를 포함하는 열전 소자 - Google Patents
P 형 스커테루다이트 열전재료, 이의 제조 방법 및 이를 포함하는 열전 소자 Download PDFInfo
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- WO2017082578A1 WO2017082578A1 PCT/KR2016/012530 KR2016012530W WO2017082578A1 WO 2017082578 A1 WO2017082578 A1 WO 2017082578A1 KR 2016012530 W KR2016012530 W KR 2016012530W WO 2017082578 A1 WO2017082578 A1 WO 2017082578A1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/01—Manufacture or treatment
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/85—Thermoelectric active materials
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/85—Thermoelectric active materials
- H10N10/851—Thermoelectric active materials comprising inorganic compositions
- H10N10/852—Thermoelectric active materials comprising inorganic compositions comprising tellurium, selenium or sulfur
Definitions
- thermoelectric material p-type scrutherite thermoelectric material, manufacturing method thereof and thermoelectric element including the same
- the present invention relates to a P-type scutterrudite thermoelectric material, a method for manufacturing the same, and a thermoelectric element including the same, and more particularly, to a P-type scuderudite thermoelectric material exhibiting high thermoelectric performance by introducing a specific filler and a charge compensation material. It relates to a manufacturing method and a thermoelectric element thereof.
- thermoelectric materials using waste heat as one of alternative energy is being accelerated.
- thermoelectric material The energy conversion efficiency of these thermoelectric materials is the performance index value of the thermoelectric material
- ZT is determined according to Seebeck coefficient, electrical conductivity and thermal conductivity, and more specifically, is proportional to the square of the Seebeck coefficient and electrical conductivity, and inversely proportional to thermal conductivity. Therefore, in order to increase the energy conversion efficiency of the thermoelectric conversion element, it is necessary to develop a thermoelectric conversion material having a high Seebeck coefficient or high electrical conductivity or low thermal conductivity.
- the unit lattice should be large, complex crystal structure, heavy atomic mass, strong covalent bonds, large effective carrier mass, and high carrier mobility to have good thermoelectric performance. Narrow conditions, small differences in electronegativity between constituent atoms, etc. are required. In the case of Skutterudi te, narrow energy bands 3 ⁇ 4 and high
- thermoelectric performance index by controlling a hole carrier concentration by inducing a part of an element with a doping element and inducing lattice scattering has been proposed.
- An object of the present invention is to provide a P-type scudrudite thermoelectric material having excellent thermoelectric performance.
- the present invention is to provide a method for producing the P-type scrutherite thermoelectric material.
- thermoelectric element containing the said P-type scrutherite thermoelectric material.
- the present invention provides a P-type scuderudite thermoelectric material represented by the following formula (1).
- the present invention is a raw material of Fe, Co and Sb, and at least two kinds of raw materials selected from the group consisting of Ce, La, Sm, Nd, Yb, In and Ba and Sn, Ge, Melting a mixture comprising at least one raw material selected from the group consisting of Se and Te; Cooling the molten mixture to form an ingot; Annealing the ingot; Grinding the ingot into powder; And sintering the powder; provides a method for producing a P-type scrutherite thermoelectric material comprising a.
- thermoelectric element containing the said P-type scruterite thermoelectric material.
- thermoelectric material represented by the following formula (1):
- M is at least two elements selected from the group consisting of Ce, La, Sm, Nd, Yb, In and Ba,
- H is at least one element selected from the group consisting of Sn, Ge, Se and Te,
- the present inventors have conducted research on P-type scrutherite thermoelectric materials having excellent thermoelectric performance, and are made of Ce, La, Sm, Nd, Yb, In, and Ba as fillers in P-type scutterrudite thermoelectric materials.
- the experiment shows that the lattice thermal conductivity is lowered and the output factor is increased to show high thermoelectric conversion efficiency.
- the invention has been completed. More specifically, two voids are present in the unit grid of the P-type scutterudite thermoelectric material, and when the fillers represented by M in the above formulas are layered, the rattling is performed. By reducing the lattice thermal conductivity and supplying additional electrons to change the hole carrier concentration. As described above, the P-type scudrudite thermoelectric material having reduced lattice thermal conductivity and improved output factor may exhibit more improved thermoelectric characteristics.
- the filler multi-layered two or more selected from the group consisting of Ce, La, Sni, Nd, Yb, In, and Ba
- the thermoelectric properties improved compared to the case of using one type of filler
- the thermoelectric material which has is provided.
- the filler may be multi-filled two or more selected from the group consisting of Nd, Ce, and Yb, specifically Nd and Ce multi-filled, Nd and Yb multi-filled, or Ce And Yb can be multi-layered.
- the P-type scutterrudite thermoelectric material is doped with a Co charge compensation material in the Fe site
- the y value in the formula (1) represents the doping amount of Co doped in the Fe site, a value in the range of 0 ⁇ y ⁇ 4 Has
- the doping amount y of Co exceeds 1.5, the hole carrier concentration decreases according to the X and z values, which may cause a problem of deterioration of the P-type characteristics.
- the y value is preferably 0 ⁇ y ⁇ 1.5.
- the P-type scriberite thermoelectric material is doped with a specific charge compensation material represented by H in the formula (1), as well as Fe site, Sb site.
- H is at least one member selected from the group consisting of Sn, Ge, Se, and Te
- the doping amount z of H doped at Sb has a value in the range of 0 ⁇ z ⁇ 12.
- the doping amount z value of H exceeds 0.2, since the thermoelectric properties may be reduced by the formation of the secondary phase, it is preferable that 0 ⁇ z ⁇ 0.2.
- the P-type scudrudite thermoelectric material doped not only with Fe but also with Sb is doped with a specific charge compensation material to control the hole carrier concentration. It can optimize and reduce the lattice thermal conductivity to have a higher thermoelectric performance index ZT value.
- Sn or Te as the charge compensation material doped at the Sb site, which can provide one additional hole for Sn and one for Te in the P-type scutterudite thermoelectric material. This is because additional electrons can be provided, so that the hole carrier concentration can be controlled and optimized by using the Sn: or Te appropriately alone or in combination.
- P-type scrutherite thermoelectric material represented by Chemical Formula 1 may include Nd 0 . 4 Ce 0 . 4 Fe 3 . o Coi. 0 Sbn. 9 Sn 0 . i, Nd 0 . 4 Yb 0. 4 Fe 3 . 0 Coi. 0 Sbn. 9 Sn 0 . i, and Ceo. bo.
- a Fes.oCoLoSbn.gSncu etc. are mentioned.
- Sintering the powder may be provided a method for producing a P-type scuterudite thermoelectric material comprising a.
- the present inventors have conducted research on a P-type scrutherite thermoelectric material having excellent thermoelectric performance, and the P-type scrutherite thermoelectric material manufactured by the above method is Ce, La, Sm, Including two or more selected from the group consisting of Nd, Yb, In and Ba as a layering material, doped with a specific charge compensation material in Fe and Sb sites, the lattice thermal conductivity and high output factor, improved thermoelectric conversion efficiency It was confirmed through the experiments.
- the raw material of Fe, Co and Sb two or more raw materials selected from the group consisting of Ce, La, Sm, Nd, Yb, In and Ba and Sn, Ge, Se and Te
- One or more selected raw materials are stoichiometrically weighed and mixed, charged in a quartz tube, and then The mixture may be melted.
- the mixture in order to prevent reaction between the raw material and the quartz tube, the mixture may be first put into a carbon crucible and then charged into the quartz tube.
- the mixture may be melted at a temperature of about 950 to 1200 ° C. in a vacuum and sealed quartz tube.
- the angle of inclination includes a natural angle, angle of inclination using a medium, and the like, and the angle of angle used in the field of thermoelectric materials may be applied without limitation.
- the ingot may be annealed at about 400 to 800 ° C for 10 to 200 hours.
- the annealed ingot may be pulverized into a powder, in which case the powder may be pulverized to have a particle diameter of 100 urn or less, and the pulverization method and apparatus may be applied without limitation to methods and apparatuses used in the field of thermoelectric materials. Can be.
- the pulverized powder may be sintered.
- the sintering may be performed at a temperature of about 500 to 700 ° C. using a spark plasma sintering method, and the sintering time is preferably 5 to 60 minutes at a pressure of 10 to 100 MPa.
- a thermoelectric device including the P-type scrutherite thermoelectric material of the above-described embodiment may be provided.
- thermoelectric element including the P-type scutterrudite thermoelectric material also has a high thermoelectric performance index ZT value. It can be usefully applied to future technology fields that can utilize the device for thermoelectric power generation.
- thermoelectric material having excellent thermoelectric performance
- a method of manufacturing the same and a thermoelectric device including the same.
- Figure 2 is a graph showing the electrical conductivity of the Scudrudite prepared in Examples and Comparative Examples.
- Figure 3 is a graph showing the Seebeck coefficient of the Scuterrudite prepared in Examples and Comparative Examples.
- Figure 4 is a graph showing the power factor (power factor) of the sciderrudite prepared in Examples and Comparative Examples.
- FIG. 5 is a graph showing the total thermal conductivity of the scudrudite prepared in Examples and Comparative Examples.
- FIG. 6 is a graph showing lattice thermal conductivity of scutterrudite prepared in Examples and Comparative Examples.
- thermoelectric performance index (ZT) of the Scudrudite prepared in Examples and Comparative Examples.
- Example 1 Ndo.4Ceo. 4Fe3 . oCcn.oSbu . Manufacture of 9Sri ⁇ j
- the weight was measured at a molar ratio of 0.4: 0.4: 3: 1: 11.9: 0.1 and placed in a carbon crucible, which was then charged into a quartz tube. The inside of the quartz tube was vacuumed and sealed. And melting the raw material in llCXrC for 24 hours Constant temperature was maintained inside the furnace. Next, the quartz tube was naturally engraved at room temperature to form an ingot, and then annealed by maintaining the temperature constant at 650 ° C. for 72 hours in a f urnace .
- the annealed ingot material was finely ground into a powder having a particle diameter of 75 or less, and sintered under a discharge plasma sintering method (SPS) for 10 minutes at a pressure of 50 MPa and a temperature of 630 ° C. to prepare a P-type scutterudite thermoelectric material It was.
- SPS discharge plasma sintering method
- thermoelectric material in the same manner as in Example 1 except that high purity raw materials Nd, Yb, Fe, Co, Sb and Sn were used in a molar ratio of 0.4: 0.4: 3: 1: 11.9: 0.1
- Example 3 Preparation of Ce ⁇ Yb Fe ⁇ Co ⁇ Sb ⁇ Sn ⁇
- thermoelectric material was manufactured in the same manner as in Example 1, except that high purity raw materials Nd, Ce, Fe, Co, and Sb were used in a molar ratio of 0.4: 0.4: 3: 1: 12. .
- Comparative Example 2 Preparation of ⁇ ⁇ ?
- a P-type scuderudite thermoelectric material was manufactured in the same manner as in Example 1, except that high purity raw materials Nd, Yb, Fe, Co, and Sb were used in a molar ratio of 0.4: 0.4: 3: 1: 12. .
- Comparative Example 3 Preparation of Ce Yb ⁇ Fe ( ⁇ ⁇
- a P-type scudrudite thermoelectric material was manufactured in the same manner as in Example 1, except that the high purity raw materials Ce, Yb, Fe, Co, and Sb were used in a molar ratio of 0.4: 0.4: 3: 1: 12.
- Comparative Example 4 Preparation of Ce ⁇ Fe ⁇ Co j Sb Sn ⁇
- thermoelectric material was manufactured in the same manner as in Example 1, except that high purity raw materials Ce, Fe, Co, Sb, and Sn were used in a molar ratio of 0.8: 3: 1: 11.9: 0.1. .
- Comparative Example 5 Preparation of N gFe Co jjj Sb ⁇ Sn ⁇
- thermoelectric material was manufactured in the same manner as in Example 1, except that high purity raw materials Nd, Fe, Co, Sb, and Sn were used in a molar ratio of 0.8: 3: 1: 11.9: 0.1. .
- thermoelectric material was manufactured in the same manner as in Example 1, except that Yb, Fe, Co, Sb, and Sn, which were high purity raw materials, were used in a molar ratio of 0.8: 3: 1: 11.9: 0.1. .
- Experimental Example 1 A P-type scuderudite thermoelectric material was manufactured in the same manner as in Example 1, except that Yb, Fe, Co, Sb, and Sn, which were high purity raw materials, were used in a molar ratio of 0.8: 3: 1: 11.9: 0.1. .
- thermoelectric materials prepared in Examples and Comparative Examples are shown in FIG. 1 by phase analysis using an X-ray diffraction analyzer (XRD).
- FIG. 1 each represent Nd 0 . 4 Ce 0 . 4 Fe 3 CoSb 12 , Nd 0 . 4 Yb 0 . 4 Fe 3 CoSb 12, Ce 0 .4Ybo.4Fe 3 will showing the comparison examples 1, 2 and 3 of the analysis result having a composition of CoSbi2, (b), (d ), (f) , respectively
- thermoelectric material specimens prepared in Examples and Comparative Examples The electrical conductivity of the P-type scuterudite thermoelectric material specimens prepared in Examples and Comparative Examples was measured according to temperature change, and is shown in FIG. 2, and the average values of 100 to 500 ° C. are shown in Table 1.
- the decrease in the electrical conductivity of the P-type scudrudite thermoelectric materials of Examples and Comparative Examples with increasing temperature indicates that the synthesized scudrudite is a degenerate semiconductor.
- the electrical conductivity varies according to the oxidation value (oxidation state, Yb +2 , Nd +2 ⁇ +3 , Ce + 3 + +4 ) of the raw material used as the filler (M).
- the combination of fillers with lower oxidation rate increases the concentration of holes, which are P-type charge carriers, because fewer electrons are supplied to the scudrudite structure.
- High conductivity As shown in FIG.
- the comparative example 6 in which only Yb is used as the filler shows the highest electrical conductivity and decreases in the order of (Ndjb), (Cejb), Nd, (Nd.Ce), and Ce.
- Examples 1, 2, and 3 have reduced electrical conductivity, respectively, compared to Comparative Examples 1, 2, and 3, in which Sn is not doped in place of Sb, which causes Sb to be replaced by Sn, causing point defect scattering, thereby preventing hole movement. It can be inferred as one.
- the Seebeck coefficient S was measured according to the temperature change of the P-type scuderudite thermoelectric material specimens prepared in Examples and Comparative Examples, and is shown in FIG. 3, and an average value of 100 to 500 ° C. is shown in Table 1. It was.
- the output factor of the P-type scuterudite thermoelectric material specimens prepared in Examples and Comparative Examples was calculated according to the temperature change, and is shown in FIG. 4, and an average value of 100 to 500 ° C. is shown in Table 1.
- the output factor increases and saturates, and then decreases again, and the SC of the Examples 1, 2, and 3 doped with Sn using two kinds of layered materials.
- the output factor value is more superior to Comparative Examples 1, 2, 3, and Sn-doped Comparative Examples 4, 5, and 6, and particularly, Ndo.4Ybo.4Fe3CoSbn of Example 2. .9Sno.!
- the output factor measured at 400 ° C. was very high, about 26 yW / crnK 2 .
- the thermal conductivity of the P-type scudrudite thermoelectric material specimens prepared in Examples and Comparative Examples was measured according to temperature change, and is shown in FIGS. 5 and 6.
- the value calculated from the Seebeck coefficient according to was used.
- the total thermal conductivity ⁇ is shown in FIG. 5, the average value of 100 to 500 ° C. is shown in Table 1, and the lattice thermal conductivity (1) is shown in FIG. 6.
- thermoelectric performance index (ZT) of the P-type scutterrudite thermoelectric material specimens prepared in Examples and Comparative Examples was calculated according to temperature change, and the average values of 100 to 500 ° C. It was sandwiched in 1.
- thermoelectric performance index (ZT) was higher than that of Comparative Examples 4, 5, and 6 using one type of layered material.
- Example 1 9.1148 1091 141 21.6 2.04 0.62 Comparative Example 1 9.1137 1124 132 19.4 2.14 0.53 Example 2 9.1198 1283 134 22.9 2.17 0.62 Comparative Example 2 9.1182 1336 131 22.6 2.26 0.58 Example 3 9.1201 1126 138 21.3 2.26 0.56 Comparative Example 3 9.1191 1186 134 21.2 2.37 0.52 Comparative Example 4 9.1215 1067 137 19.9 2.28 0.51 Comparative Example 5 9.1103 1181 134 21.1 2.28 0.54 Comparative Example 6 9.1286 1603 117 22.0 2.82 0.46 As shown in Table 1 above, Example 1 multi-layered and Sn-doped In the case of 2, 3, the lattice constant increased compared to Comparative Examples 1, 2 and 3 in which Sn was not doped, indicating that Sn having a large size was well substituted at the Sb site.
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Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP16864504.2A EP3293776B1 (en) | 2015-11-11 | 2016-11-02 | P-type skutterudite thermoelectric material, manufacturing method therefor, and thermoelectric element comprising same |
| CN201680035091.XA CN107710429B (zh) | 2015-11-11 | 2016-11-02 | P型方钴矿热电材料、其制备方法和包含其的热电装置 |
| JP2017560221A JP6608961B2 (ja) | 2015-11-11 | 2016-11-02 | P型スクッテルダイト熱電材料、その製造方法およびこれを含む熱電素子 |
| US15/577,195 US10790428B2 (en) | 2015-11-11 | 2016-11-02 | P-type skutterudite thermoelectric material, method for preparing the same, and thermoelectric device including the same |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20150158244 | 2015-11-11 | ||
| KR10-2015-0158244 | 2015-11-11 | ||
| KR10-2016-0133019 | 2016-10-13 | ||
| KR1020160133019A KR102059674B1 (ko) | 2015-11-11 | 2016-10-13 | P형 스커테루다이트 열전재료, 이의 제조 방법 및 이를 포함하는 열전 소자 |
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| WO2017082578A1 true WO2017082578A1 (ko) | 2017-05-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110832650A (zh) * | 2018-06-11 | 2020-02-21 | 株式会社Lg化学 | 热电材料和包含其的热电装置 |
| CN113903853A (zh) * | 2021-03-04 | 2022-01-07 | 杭州安誉科技有限公司 | 一种半导体制冷片及其在实时荧光定量pcr仪中的应用 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005104255A2 (en) * | 2004-04-14 | 2005-11-03 | E.I. Dupont De Nemours And Company | High performance thermoelectric materials and their method of preparation |
| US20130323110A1 (en) * | 2010-08-20 | 2013-12-05 | Monika Backhaus-Ricoult | P-type skutterudite material and method of making the same |
-
2016
- 2016-11-02 WO PCT/KR2016/012530 patent/WO2017082578A1/ko not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005104255A2 (en) * | 2004-04-14 | 2005-11-03 | E.I. Dupont De Nemours And Company | High performance thermoelectric materials and their method of preparation |
| US20130323110A1 (en) * | 2010-08-20 | 2013-12-05 | Monika Backhaus-Ricoult | P-type skutterudite material and method of making the same |
Non-Patent Citations (4)
| Title |
|---|
| DUAN, FENFEN ET AL.: "Thermoelectric Properties of Sn Substituted p-type Nd Filled Skutterudites", JOURNAL OF ALLOYS AND COMPOUNDS, vol. 639, 5 August 2015 (2015-08-05), pages 68 - 73, XP029156791 * |
| LIU, RUIHENG ET AL.: "p-Type Skutterudites RxMyFe3CoSb12 (R, M - Ba, Ce, Nd, and Yb): Effectiveness of Double-filling for the Lattice Thermal Conductivity Reduction", INTERMETALLIES, vol. 19, no. 11, November 2011 (2011-11-01), pages 1747 - 1751, XP028276413 * |
| ROGL, G. ET AL.: "New Bulk p-type Skutterudites DD 0.7Fe2.7Co1.3Sb12-xXx (X = Ge, Sn) Reaching ZT > 1.3", ACTA MATERIALLIA, vol. 91, 1 June 2015 (2015-06-01), pages 227 - 238, XP055382257 * |
| See also references of EP3293776A4 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110832650A (zh) * | 2018-06-11 | 2020-02-21 | 株式会社Lg化学 | 热电材料和包含其的热电装置 |
| EP3633745A4 (en) * | 2018-06-11 | 2020-05-06 | Lg Chem, Ltd. | THERMOELECTRIC MATERIAL AND THERMOELECTRIC ELEMENT THEREFOR |
| JP2020528664A (ja) * | 2018-06-11 | 2020-09-24 | エルジー・ケム・リミテッド | 熱電材料およびこれを含む熱電素子 |
| US11158779B1 (en) | 2018-06-11 | 2021-10-26 | Lg Chem, Ltd. | Thermoelectric material and thermoelectric device including the same |
| CN110832650B (zh) * | 2018-06-11 | 2023-05-23 | 株式会社Lg化学 | 热电材料和包含其的热电装置 |
| CN113903853A (zh) * | 2021-03-04 | 2022-01-07 | 杭州安誉科技有限公司 | 一种半导体制冷片及其在实时荧光定量pcr仪中的应用 |
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