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Preparation method for bismuth telluride temperature difference power generation device

A technology of thermoelectric power generation and bismuth telluride, which is applied in the field of preparation of bismuth telluride thermoelectric power generation devices, can solve the problems of small temperature tolerance and temperature range, large gap between components, and large device volume, etc., to improve the temperature tolerance and temperature range, the effect of reducing the size of the device

Inactive Publication Date: 2014-04-16
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Application Information

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Problems solved by technology

[0003] At present, the ratio of the height and cross-sectional area of ​​the thermoelectric element used in the preparation method of the bismuth telluride thermoelectric power generation device is relatively small, the gap between the elements is large, the device volume is large, and the temperature resistance and temperature range are small, generally 80 ℃-100℃, not suitable for power generation under high temperature and wide range temperature conditions of 150℃-200℃

Method used

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  • Preparation method for bismuth telluride temperature difference power generation device
  • Preparation method for bismuth telluride temperature difference power generation device
  • Preparation method for bismuth telluride temperature difference power generation device

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preparation example Construction

[0027] A method for preparing a bismuth telluride thermoelectric power generation device, comprising the following steps:

[0028] (1) Take one piece of N and P bismuth telluride materials prepared by hot pressing or hot extrusion, and the side length of the surface perpendicular to the hot pressing pressure of the material is required to meet the height and dimension requirements of the component;

[0029] (2) Use an internal circle slicer to cut the P and N-type materials in (1) into thin slices with a ratio of height to thickness greater than 15;

[0030] (3) Paste the cut bismuth telluride N-type flakes and bismuth telluride P-type flakes together in the form of N-P-N-P-N-P-intervals with double-sided film tape, and ensure that the slices are neatly aligned;

[0031] (4) Cut the multiple pieces of material pasted in (3) into thin slices with the same height and thickness as in (2) with an inner circle slicer, and make the side length of the end face 0.6mm-1.0mm Bismuth te...

Embodiment

[0034] Embodiment: refer to attached Figure 1-Figure 4 .

[0035] Taking the bismuth telluride micro thermoelectric power generation device composed of 32 pairs of bismuth telluride N-type and P-type monomer elements with a size of 0.8mm×0.8mm×20mm as an example, the preparation method of the bismuth telluride thermoelectric power generation device of the present invention is described production process.

[0036] (1) Take one piece of hot-pressed N and P bismuth telluride materials, and the side length of the surface perpendicular to the hot-pressed pressure of the material is required to meet the height and dimension requirements of the component;

[0037] (2) Cut the P and N-type materials into thin slices of 0.8 mm×20 mm by using an internal circle slicer.

[0038] (3) Use a polyimide double-sided film tape with a thickness of 0.4 mm to cut the bismuth telluride N-type flakes and bismuth telluride P-type flakes according to the figure 2 The shown N-P-N-P-N-P- are past...

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Abstract

The invention relates to a preparation method for a bismuth telluride temperature difference power generation device. The preparation method comprises the following steps of: (1) taking a piece of N bismuth telluride material and a piece of P bismuth telluride material; (2) cutting the materials obtained by the step (1) into thin sheets with height-to-thickness ratio being greater than 15 by using an inner circular slicing machine; (3) adhering the thin sheets obtained by the step (2) in an N-P-N-P-N-P-alternate mode by using double-faced adhesive tape; (4) cutting a plurality of pieces of materials obtained by the (3) into thin sheets with the same height and thickness as those in the step (2) by using the inner circular slicing machine; (5) adhering adjacent layers of the cut thin sheets obtained by the step (4) in the N-P-N-P-N-P- alternate mode to form a temperature difference power generation device magic cube with a cold face at one end and a hot face at the other end; and (6) welding an N-type unit element and a P-type unit element with adjacent cold and hot end faces obtained by the step (5), which form a group, into an electric connecting piece to finish the manufacturing of the bismuth telluride temperature difference power generation device. The bismuth telluride temperature difference power generation device has a small size and can be used for working under a large-range temperature condition for a long time at the high temperature of 150-200 DEG C.

Description

technical field [0001] The invention belongs to the technical field of thermoelectricity, and in particular relates to a preparation method of a bismuth telluride thermoelectric power generation device. Background technique [0002] Bismuth telluride-based thermoelectric materials have been the best thermoelectric conversion materials in the temperature range from -50°C to 300°C since they were discovered in the 1950s. The thermoelectric device developed with this material can not only generate electricity under a certain heat input condition, but also perform cooling under a certain current condition. [0003] At present, the ratio of the height and cross-sectional area of ​​the thermoelectric element used in the preparation method of the bismuth telluride thermoelectric power generation device is relatively small, the gap between the elements is large, the device volume is large, and the temperature resistance and temperature range are small, generally 80 ℃-100℃, not suit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34H10N10/01
Inventor 张丽丽任保国刘佳林
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST