Middle-high temperature thermoelectric module

A technology of thermoelectric modules and electric modules, which is applied in the directions of thermoelectric device parts, thermoelectric device manufacturing/processing, thermoelectric devices using only Peltier or Seebeck effect, etc. Diffusion and other problems, to achieve the effect of good continuity, good use effect and economic value, environmental protection benefit and excellent insulation performance

Active Publication Date: 2015-09-23
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above two patents are only set for the sublimation of larger Sb atoms. Due to the extremely high porosity of airgel, it is difficult to suppress the diffusion of small molecular oxygen

Method used

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  • Middle-high temperature thermoelectric module
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Examples

Experimental program
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preparation example Construction

[0054] The invention provides a method for preparing a thermoelectric device. In order to further improve the conversion efficiency of the thermoelectric device, an anti-oxidation layer with strong adhesion, high density and good continuity is formed on the outer layer or outer layers by physical or chemical methods. Sublimation diffusion barrier protective layer, and this layer has the excellent performance of long service life and strong heat aging resistance.

[0055] The outside of the diffusion barrier protection layer is a thermal insulation layer composed of aerogel or aerogel composite material, while the inner layer and / or outer layer is one or more layers of metal layer, the metal transition layer can prevent The high-temperature volatilization of the Sb element can also increase the bonding strength between the oxide layer and the skutterudite material.

[0056] The heat insulation layer adopts airgel or fiber composite airgel or ceramic powder composite airgel. Th...

Embodiment 1

[0085] Sintered dense thermoelectric materials such as n-type Yb 0.3 co 4 Sb 12 , p-type CeFe 3 CoSb 12 And cut into thin slices of equal thickness, the relative density is greater than 96% (see figure 1 );

[0086] Cover the low-temperature end with a mask, and only sputter Mo, Cr, etc. on the high-temperature end to prevent the diffusion barrier protective layer from Sb diffusion (see figure 2 );

[0087] Connect the p-type and n-type materials sputtered with a diffusion barrier protection layer with an insulating high-temperature-resistant adhesive, such as nano-SiO modified by methyl silicone resin 2 adhesive (see image 3 );

[0088] Polymer-assisted deposition to prepare diffusion barrier protective layers, such as Ti film, W film, etc.;

[0089] Put the n-p material into the mold, magnetron sputtering diffusion barrier buffer layer Ti, Mo, etc., and then add a small amount of Ti powder on the diffusion barrier buffer layer, and sinter the high-temperature end ...

Embodiment 2

[0093] Sintered dense p- or n-type thermoelectric blocks with a relative density of >96% and a size of 13×13×4mm;

[0094] Wire cutting into three thermoelectric pins with a size of 4×4×13mm, after surface polishing, sequentially sputter Mo, Si and other diffusion barrier protective layers. The sputtering process of the Mo layer is as follows: Ar flow rate 80sccm, DC power 200W, substrate temperature 673K, sputtering time 30min, ignition pressure 5Pa, background vacuum better than 5.0×10 -4 The thickness of the Pa and Mo layers is about 1 μm. The sputtering process of the Si layer is as follows: Ar flow rate 80sccm, DC power 200W, substrate temperature 673K, sputtering time 80min, ignition pressure 7Pa, background vacuum better than 5.0×10 -4 Pa, Si layer thickness is about 500nm;

[0095] Silica sol nanophase binder modified with siloxane via SiO 2 , ZrO 2 After airgel recombination, thermoelectric bulk materials sputtered with protective films of Mo and Si were connected...

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Abstract

The invention relates to a middle-high temperature thermoelectric module. The middle-high temperature thermoelectric module comprises at least one group of thermoelectric pair, wherein the thermoelectric pair comprises two thermoelectric blocks connected through an insulating supporting plate; an electrode formed on a high temperature end surface of the thermoelectric pair; a diffusion blocking protection layer formed at least on the surface of the thermoelectric pair and/or the surfaces of the two thermoelectric blocks; an anti-oxidation layer formed at least on the surface of the thermoelectric pair and/or the surfaces of the two thermoelectric blocks; and an aerogel thermal insulation layer filling a gap of the at least one group of thermoelectric pair. The thermoelectric module provided by the invention simultaneously has the performance of sublimation prevention, anti-oxidation, heat insulation and the like, and the thermoelectric performance and the efficiency of the thermoelectric module are improved; in addition, the thermoelectric module has a self-protection function when working under conditions relating to corrosive gas, moist, chemical medium corrosion, temperature cold-hot alternation and the like.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric power generation, and relates to the design and preparation of a thermoelectric conversion module. More specifically, the present invention provides a method for designing and manufacturing a thermoelectric device for power generation in a medium-high temperature region. The invention is especially suitable for the design and preparation method of the skutterudite-based thermoelectric module and device for power generation in the middle temperature region. Background technique [0002] As a functional material capable of directly converting heat and electricity, thermoelectric materials use their own Seebeck effect and Peltier effect to directly convert heat and electricity. Thermoelectric power generation and refrigeration devices based on thermoelectric materials have the advantages of small size, light weight, no mechanical transmission parts, and no noise during operation. They have br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/02H01L35/32H01L35/34
Inventor 陈立东董洪亮李小亚江莞廖锦城唐云山
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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