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Thermoelectric Conversion Material And Thermoelectric Conversion Module Using The Same

A thermoelectric conversion material and thermoelectric conversion technology, which can be applied to the junction lead-out material of thermoelectric devices, thermoelectric devices that only use the Peltier or Seebeck effect, etc., and can solve the problems of difficulty in mass production, high cost, and strong Te toxicity.

Inactive Publication Date: 2015-05-27
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this material has high conversion efficiency, both Bi and Te are expensive, and Te is extremely toxic, so it is difficult to mass-produce, reduce costs, and reduce environmental burdens

Method used

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  • Thermoelectric Conversion Material And Thermoelectric Conversion Module Using The Same
  • Thermoelectric Conversion Material And Thermoelectric Conversion Module Using The Same
  • Thermoelectric Conversion Material And Thermoelectric Conversion Module Using The Same

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Experimental program
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Effect test

Embodiment approach 1

[0055]

[0056] figure 1 (a) and (b) are schematic diagrams of the thermoelectric conversion module 10 according to Embodiment 1 of the present invention, figure 1 (a) shows the state before mounting the upper substrate 14, figure 1 (b) shows the state after mounting the upper substrate 14 . The thermoelectric conversion module 10 has a p-type thermoelectric conversion part 11 formed of a p-type thermoelectric conversion material, an n-type thermoelectric conversion part 12 formed of an n-type thermoelectric conversion material, an electrode 13, an upper substrate 14, and a lower substrate 15. constitute. Although not shown in the figure, a body (main body) is provided to cover the assembled components, and a part of the electrodes 13 is drawn out of the body in order to extract electric power from each thermoelectric conversion unit.

[0057] The p-type thermoelectric conversion parts 11 and the n-type thermoelectric conversion parts 12 are alternately connected in serie...

Embodiment approach 2

[0124] The thermoelectric conversion performance of the thermoelectric conversion module is affected by the heat flux Q flowing into the module in addition to the conversion efficiency η of the thermoelectric conversion material. The heat flow Q is a variable affected by the structure of the thermoelectric conversion module (especially the size of each part), so it is important to design the optimal module structure according to the characteristics of the selected thermoelectric conversion material. Therefore, in the second embodiment of the present invention, on the premise of using the thermoelectric conversion material described in the first embodiment, the optimization of the size of each part of the thermoelectric conversion module 10 will be discussed. Other configurations of the thermoelectric conversion module 10 are the same as those of the first embodiment.

[0125] Figure 9 It is the result of calculating the change in output (power) when the ratio of the cross-se...

Embodiment approach 3

[0143] use Figure 13 and Figure 14 The thermoelectric conversion material according to Embodiment 3 of the present invention will be described. In addition, matters described in Embodiments 1 and 2 but not described in this embodiment can also be applied to this embodiment unless there is a special case.

[0144] As described above, in the case of the thermoelectric conversion material of the Heusler alloy system, if the composition is adjusted so as to adjust the VEC (the total number of valence electrons per unit cell), since the carrier concentration of the thermoelectric conversion material is controlled modulation, thus enabling control of the thermoelectric conversion characteristics. However, only the carrier concentration can be modulated without changing the energy band structure through VEC adjustment, which is limited to a small range of VEC adjustment. Therefore, in order to obtain the optimum value of the thermoelectric conversion characteristics in the range...

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Abstract

The present invention provides a thermoelectric conversion material that is a material comprising elements less poisonous than Te and has a Seebeck coefficient comparable to BiTe. The present invention is a full-Heusler alloy that is represented by the composition formula Fe2+σTi1+ySi1+z and has σ, y, and z allowing the material to fall within the region surrounded by (Fe, Ti, Si)=(50, 37, 13), (50, 14, 36), (45, 30, 25), (39.5, 25, 35.5), (54, 21, 25), and (55.5, 25, 19.5) by at % in an Fe—Ti—Si ternary alloy phase diagram.

Description

technical field [0001] The present invention relates to a thermoelectric conversion material and a thermoelectric conversion module using the same. Background technique [0002] In recent years, international attention has been paid to CO 2 The growing concern for emission reductions has advanced the emission of large amounts of CO from 2 Technological innovation of next-generation energy such as the transfer of resource energy to natural energy or heat energy reuse. Candidates for next-generation energy technologies include technologies that utilize natural energy such as sunlight and wind power, and technologies that recycle lost parts of primary energy such as heat and vibrations emitted by resource energy. [0003] In contrast to conventional resource energy, which is a concentrated type of energy mainly based on large-scale power generation facilities, next-generation energy is characterized by being distributed in both natural energy and recycled energy. In modern e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L35/14H01L35/20H01L35/32
CPCC22C38/00C22C33/0278C22C38/14C22C38/12C22C38/02C22C38/008C22C30/04C22C30/00C22C13/00H10N10/854
Inventor 西出聪悟籔内真早川纯黑崎洋辅深谷直人
Owner HITACHI METALS LTD