EP1891688A2 - Verfahren zur herstellung eines aus einem thermoelektrischen trägermaterial mit thermischen streuzentren bestehenden thermoelektrischen werkstoffes und thermoelektrischer werkstoff - Google Patents
Verfahren zur herstellung eines aus einem thermoelektrischen trägermaterial mit thermischen streuzentren bestehenden thermoelektrischen werkstoffes und thermoelektrischer werkstoffInfo
- Publication number
- EP1891688A2 EP1891688A2 EP06754373A EP06754373A EP1891688A2 EP 1891688 A2 EP1891688 A2 EP 1891688A2 EP 06754373 A EP06754373 A EP 06754373A EP 06754373 A EP06754373 A EP 06754373A EP 1891688 A2 EP1891688 A2 EP 1891688A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- thermoelectric
- melt
- carrier material
- nanoscale
- binary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- 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
Definitions
- thermoelectric material consisting of a thermoelectric substrate with thermal scattering centers and thermoelectric material
- the present invention relates to a method for producing a thermoelectric material consisting of a thermoelectric substrate with thermal scattering centers and a thermoelectric material.
- thermoelectric effectiveness ZT of thermoelectric materials can be increased by introducing thermal scattering centers into a carrier material (or a carrier matrix), if the thermal scattering centers only marginally influence the electrical properties of the carrier material.
- a prerequisite for a high efficiency of the thermoelectric material is the use of support materials with good thermoelectric efficiencies in the desired operating temperature range.
- the trapped in the substrate thermal scattering centers must not adversely affect the thermoelectric properties of the support material in total.
- the scattering centers have two-dimensional (interfaces in superlattices or multi-quantum well systems), one-dimensional (wires) or zero-dimensional (points) character.
- thermoelectric material consisting of a thermoelectric substrate with thermal scattering centers in bulk format for the industrial production of components.
- thermoelectric material consisting of a thermoelectric carrier material (carrier matrix) with thermal scattering centers, wherein a melt at least of the carrier material (the carrier matrix) is cooled so that the scattering centers as nanoscale, in the carrier material (in the carrier matrix) embedded meltings arise from the melt.
- the method according to the invention advantageously makes it possible to introduce nanoscale scattering centers ("guest”) into thermoelectrically highly effective carrier materials (“host”) via the use of suitable melts and cooling methods.
- This nano-guest-host (NGH) principle of smelting enables a variety of embodiments with simple and scalable process control for the production of materials in industrial environments and maximization of the thermoelectric effectiveness of the support material as well as the thermal scattering centers Melting takes account in particular of the industrial scale-up required.
- the cooling is followed by a heat treatment.
- the carrier material can be adjusted by the heat treatment as the n-conducting phase or as the p-conducting phase.
- the carrier material and the nanoscale scattering centers have thermoelectric properties. This results in a particularly advantageous embodiment of the present NGH principle, in which both the "hosf" material and the “guesf” material can be highly thermoelectrically highly effective.
- a binary IV-VI compound in particular PbTe, PbS, SnSe or SnTe is used as a melt, wherein this binary IV-VI compound, the support material and at least one of the components of the binary IV-VI compound, the nanoscale scattering centers form.
- PbTe as a melt
- Pb or Te precipitates or Pb- or Te-rich precipitates as nanoscale scattering centers are formed in a PbTe matrix as support material by quenching with subsequent tempering.
- a binary V-VI compound in particular Bi 2 Te 3 , Bi 2 Se 3 , Sb 2 Se 3 or Sb 2 Te 3 is used as a melt, wherein the binary V-VI compound, the support material and at least one the components and / or subcombination of the components of the binary V-VI compound form the nanoscale scattering centers.
- Bi 2 Te 3 as a melt
- BiTe or Te precipitates can be formed as nanoscale scattering centers in a Bi 2 Te 3 matrix as carrier material by quenching with subsequent heat treatment.
- a quasibinary IV-VI compound in particular (PbSn) Te, (PbSn) Se or (PbSn) S is used as melt.
- the optimum thermoelectric use temperature of the carrier material can be adjusted via a proportion of Sn in the melt.
- a band gap of the carrier material can be reduced by adding SnTe and / or elemental Sn, whereby the optimum thermoelectric use temperature is reduced.
- a two-component system comprising Bi 2 Te 3 and PbTe is used as the melt, PbBi 4 Ti 7 precipitation being set as nanoscale scattering centers in Bi 2 Te 3 as support material or PbTe as support material in accordance with the temperature control during cooling.
- the melt used is a quasi-binary alloy of Pb or S or Se or Te with, in particular, Ba, Ca, Sr, Eu or Ge as the cation mixed crystal partner.
- a band gap of the carrier material can be increased by the cation mixing crystal partners, with the optimum operating temperature of such thermoelectric material composites being shifted toward higher temperatures.
- thermoelectric material with thermal scattering centers embedded as nanoscale precipitates from a melt in a thermoelectric carrier material (a carrier matrix).
- the nanoscale precipitations preferably consist of a thermoelectric material.
- Fig. 2 is an illustration of the generation of n- and p-conducting phases for the
- Fig. 6A measured infrared optical absorption edges in the system (PbSn) Se and
- thermoelectric materials Exemplary embodiments of solid-state thermoelectric materials and methods for their production are explained below.
- Fig. 1 the two-component system Bi 2 Te 3 -PbTe is shown as a preferred material system for a "nano-guest-host" (NGH) - approach with only thermoelectric materials.
- NSH nano-guest-host
- phase diagram shown in FIG. 1 shows that PbBi 4 Te 7 precipitates in Bi 2 Te 3 as well as PbBi 4 Ti 7 precipitates in PbTe can be adjusted by suitable melting, quenching processes and subsequent heat treatments. This is particularly advantageous, since on the one hand nanoscale scattering centers in the thermoelectric room temperature material Bi 2 Te 3 as well as scattering centers in the thermoelectric medium temperature material PbTe can be produced.
- the precipitation material PbTi 4 Te 7 here also represents a good thermoelectric material as an independent phase.
- both the Bi 2 Te3 "host” phase and the PbTe "host” phase can be adjusted as p- as well as n-type material by appropriate annealing, as shown in Figures 2 and 3 , 2 shows the logarithm log p over the coefficient 1 / T for PbTe, and FIG. 3 shows the Seebeck coefficient for the thermoelectric properties of Bi 2 Te 3 .
- Pb-Te system Another material system for the NGH approach is represented by the Pb-Te system shown in FIG. 4.
- suitable compositions of the melts, quenching and subsequent heat treatment can be used to produce a PbTe matrix as support material in which Pb - or Te precipitates are embedded.
- the Bi-Te system is shown in FIG. Consequently, it can be ensured, as shown in FIG. 5, that by suitable compositions of the melts and by quenching with subsequent tempering BiTe or Te precipitates are in a Bi 2 Te 3 matrix.
- the Bi-Te system here stands by way of example for binary V-VI compounds, in particular Bi 2 Se 3 , Sb 2 Se 3 and Sb 2 Te 3 , which apply the preceding statements in an analogous manner in accordance with the respective phase diagrams.
- Another material system for the NGH principle form quasibinary IV-VI compounds, in particular (PbSn) Te, (PbSn) Se and (PbSn) S.
- the operating temperature of the "hosf" material i.e., the support material
- the bandgap of the support material can be reduced, which results in the optimum use temperature starting from e.g. 600 Kelvin at PbTe can be shifted to temperatures around 300 Kelvin and lower.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005027680A DE102005027680A1 (de) | 2005-06-15 | 2005-06-15 | Verfahren zur Herstellung eines aus einem thermoelektrischen Trägermaterial mit thermischen Streuzentren bestehenden thermoelektrischen Werkstoffes und thermoelektrischer Werkstoff |
| PCT/EP2006/005739 WO2006133930A2 (de) | 2005-06-15 | 2006-06-14 | Verfahren zur herstellung eines aus einem thermoelektrischen trägermaterial mit thermischen streuzentren bestehenden thermoelektrischen werkstoffes und thermoelektrischer werkstoff |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1891688A2 true EP1891688A2 (de) | 2008-02-27 |
Family
ID=36764690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06754373A Withdrawn EP1891688A2 (de) | 2005-06-15 | 2006-06-14 | Verfahren zur herstellung eines aus einem thermoelektrischen trägermaterial mit thermischen streuzentren bestehenden thermoelektrischen werkstoffes und thermoelektrischer werkstoff |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20090038719A1 (de) |
| EP (1) | EP1891688A2 (de) |
| DE (1) | DE102005027680A1 (de) |
| WO (1) | WO2006133930A2 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8772622B2 (en) * | 2008-02-07 | 2014-07-08 | Basf Se | Doped tin tellurides for thermoelectric applications |
| KR101594132B1 (ko) * | 2009-11-05 | 2016-02-16 | 삼성전자주식회사 | 나노복합체형 열전재료, 이를 포함하는 열전모듈과 열전 장치 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4447277A (en) * | 1982-01-22 | 1984-05-08 | Energy Conversion Devices, Inc. | Multiphase thermoelectric alloys and method of making same |
| US5834828A (en) * | 1993-09-20 | 1998-11-10 | The United States Of America, As Represented By The Secretary Of The Army | Nanoporous semiconductor material and fabrication technique for use as thermoelectric elements |
| WO2006085929A2 (en) * | 2004-06-14 | 2006-08-17 | Delphi Technologies, Inc. | Thermoelectric materials comprising nanoscale inclusions to enhance seebeck coefficient |
-
2005
- 2005-06-15 DE DE102005027680A patent/DE102005027680A1/de not_active Ceased
-
2006
- 2006-06-14 US US11/917,693 patent/US20090038719A1/en not_active Abandoned
- 2006-06-14 WO PCT/EP2006/005739 patent/WO2006133930A2/de not_active Ceased
- 2006-06-14 EP EP06754373A patent/EP1891688A2/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006133930A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006133930A2 (de) | 2006-12-21 |
| US20090038719A1 (en) | 2009-02-12 |
| WO2006133930A8 (de) | 2007-12-06 |
| DE102005027680A1 (de) | 2006-12-28 |
| WO2006133930A3 (de) | 2008-03-13 |
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