A method for ultrafast preparation of thermoelectric material powders and devices

A technology of thermoelectric materials and thermoelectric devices, which is applied in the manufacture/processing of thermoelectric devices, can solve the problems of low yield rate and low utilization rate of raw materials, achieve high printing efficiency, small heat-affected area, and overcome low utilization rate of raw materials Effect

Active Publication Date: 2019-07-23
武汉新赛尔科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for rapidly preparing thermoelectric devices in view of the above-mentioned deficiencies in the prior art, by combining inkjet printing and selective laser melting 3D printing technology, and additive manufacturing technology to print thermoelectric devices , to avoid the cumbersome intermediate links in the traditional thermoelectric device preparation process, and can directly print micro-devices at the same time, overcoming the problems of low yield and low raw material utilization in the traditional welding assembly process

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  • A method for ultrafast preparation of thermoelectric material powders and devices
  • A method for ultrafast preparation of thermoelectric material powders and devices
  • A method for ultrafast preparation of thermoelectric material powders and devices

Examples

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Embodiment 1

[0090] A method for ultrafast preparation of thermoelectric material powders and devices, mainly comprising the following steps (1) and (2):

[0091] Step (1): rapid preparation of p-type Bi 0.5 Sb 1.5 Te 3 n-type Bi 2 Te 2.8 Se 0.2 Thermoelectric material powder

[0092] Press Bi powder, Te powder and Se powder (all 300 mesh, 4N) into Bi 2 Te 2.8 Se 0.2 The stoichiometric ratio of each element in (n-type thermoelectric compound) is 2:2.8:0.2 Prepare a total of 1Kg as a reactant, put it into a ball mill jar, mix it evenly, press it into a cylinder with a diameter of 80mm, put it into a vacuum chamber, and use Heating the graphite sheet and igniting it from the upper end triggers a self-propagating combustion process to obtain a single-phase p-type thermoelectric material green body, grind the green body into powder (i.e. p-type thermoelectric material powder), and pass through a 400-mesh sieve for later use;

[0093] Press Bi powder, Sb powder and Te powder (all 300 m...

Embodiment 2

[0102] A method for ultrafast preparation of thermoelectric material powders and devices, mainly comprising the following steps (1) and (2):

[0103] Step (1): Rapid preparation of p-type SnTe combined with n-type SnSe thermoelectric material powder

[0104] Prepare a total of 1Kg of Sn powder and Se powder (both 300 mesh, 4N) according to the stoichiometric ratio of each element in SnSe (n-type thermoelectric compound) 1:1 as reactants, and place them in a ball mill tank filled with Ar gas. The horizontal ball mill is fully mixed for 2 hours, and the obtained uniform powder is pressed into a cylinder with a diameter of 80 mm, which is placed in a vacuum chamber, and a heated graphite sheet is used to ignite from the upper end to initiate a self-propagating combustion reaction to obtain a single-phase p-type thermoelectric Material green body, the green body is ground into powder (i.e. p-type thermoelectric material powder), passed through a 400-mesh sieve for later use;

[0...

Embodiment 3

[0114] A method for ultrafast preparation of thermoelectric material powders and devices, mainly comprising the following two steps:

[0115] (1) Ultra-fast preparation of thermoelectric material powder: according to p-type p-CeFe 4 Sb 12 The stoichiometric ratio of each element in the thermoelectric compound prepares the elemental powder of each element as a reactant, grinds and mixes it evenly, and obtains a p-type thermoelectric material powder through a self-propagating combustion reaction or a thermal explosion reaction; according to n-type Co 4 Sb 12-x Te x The stoichiometric ratio of each element in (x=0~0.1) prepares the elemental powder of each element as a reactant, grinds and mixes them evenly, and obtains an n-type thermoelectric material powder through a self-propagating combustion reaction or a thermal explosion reaction;

[0116] Step (2): rapid preparation of p-CeFe 4 Sb 12 Binding n-type Co 4 Sb 12-x Te x (x=0~0.1) the method for thermoelectric device,...

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Abstract

The invention discloses an ultra-fast method for preparing thermoelectric material powders and devices, which comprises the following steps: (1) first weighing and mixing the elemental powders of thermoelectric materials according to the stoichiometric ratio, and then pressing them into tablets, and then performing self-propagating combustion reaction Or thermal explosion reaction, ultra-fast acquisition of thermoelectric material powder (2) Ultra-fast preparation of thermoelectric devices: the insulating substrate, electrode powder and thermoelectric material powder obtained in step (1) are used as starting materials for the selective laser melting process, through Three-dimensional printing to prepare thermoelectric devices. The present invention directly starts from the single raw material of thermoelectric materials, and prints thermoelectric devices by combining self-propagating combustion synthesis, inkjet printing and selective laser melting 3D printing technology, as well as additive manufacturing technology, avoiding the cumbersome preparation process of traditional thermoelectric devices. In the middle link, micro devices can be directly printed at the same time, which overcomes the problems of low yield and low utilization rate of raw materials in the traditional welding assembly process.

Description

technical field [0001] The invention relates to a method for ultrafast preparation of thermoelectric material powder and devices, which belongs to a new process for preparing thermoelectric materials and devices. Background technique [0002] Thermoelectric conversion technology includes thermoelectric refrigeration technology and thermoelectric power generation technology. The former uses the Peltier effect of materials to convert electrical energy into thermal energy, and the latter uses the Seebeck effect of materials to convert thermal energy into electrical energy. As a new all-solid-state energy conversion technology , thermoelectric devices have the advantages of long life, no maintenance and adaptability to harsh environments. Among them, thermoelectric refrigeration technology is applied to refrigeration fields that have special requirements for noise and space, such as wine cabinets and car seat cushions that use thermoelectric refrigeration technology. The cooling...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/34C22C1/05
CPCC22C1/05H10N10/01
Inventor 鄢永高唐新峰苏贤礼陈天乐吴林春毛宇吴克平
Owner 武汉新赛尔科技有限公司
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