a cubic phase cu 3 sbs 3 Based thermoelectric material and method for preparing the thermoelectric material by element replacement

A thermoelectric material, cu3sb1-xaxs3 technology, applied in the direction of thermoelectric device junction lead-out material, thermoelectric device manufacturing/processing, etc., can solve problems such as destroying the good contact between the material and the substrate, restricting the application in the thermoelectric field, etc., and achieving a sintering method Flexible options, easy access and storage, structurally stable effects

Inactive Publication Date: 2019-12-10
HENAN POLYTECHNIC UNIV
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  • Claims
  • Application Information

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Problems solved by technology

In the prior art, Zhong et al. synthesized Cu by solvothermal method 3 Sb 3 Nanorods, Maiello et al. synthesized Cu on glass substrates by a two-step method (magnetron sputtering + vulcanization process) 3 Sb 3 However, both products are metastable, so a structural phase transition from a metastable cubic phase to a monoclinic or orthorhombic stable phase will inevitably occur during heat treatment or service, destroying the relationship between the material and the substrate. The good contact limits its application in the field of thermoelectricity

Method used

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  • a cubic phase cu <sub>3</sub> sbs <sub>3</sub> Based thermoelectric material and method for preparing the thermoelectric material by element replacement
  • a cubic phase cu <sub>3</sub> sbs <sub>3</sub> Based thermoelectric material and method for preparing the thermoelectric material by element replacement
  • a cubic phase cu <sub>3</sub> sbs <sub>3</sub> Based thermoelectric material and method for preparing the thermoelectric material by element replacement

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Effect test

Embodiment 1

[0032] A cubic phase Cu 3 Sb 3 Based thermoelectric material, its preparation method comprises the steps:

[0033] 1) Ingredients: According to Cu 3 Sb 1-x A x S 3 (A is the ratio of each element in Co or Ni) to calculate the mass of each element, respectively take the required mass of copper, antimony, cobalt or nickel, sulfur as the reaction raw material, that is, the substance of copper, antimony, cobalt or nickel, sulfur The ratio of the amount is 3:(1-x):x:3, wherein x=0.10; The mass purity of copper is better than 99.5%, the mass purity of antimony is better than 99.5%, elemental sulfur is analytically pure, elemental cobalt (nickel ) purity of 99%;

[0034] 2) Mechanical alloying: Pour the reaction materials described in step 1) into a stainless steel ball mill tank, and perform high-energy ball milling under an inert gas protective atmosphere. The ball milling speed is 450rpm, the ball-to-material ratio is 20, and the ball milling time is 20h;

[0035] 3) Spark ...

Embodiment 2

[0040] A cubic phase Cu 3 Sb 3 Based thermoelectric material, its preparation method comprises the steps:

[0041] 1) Ingredients: according to Cu 3 Sb 1-x A x S 3 The ratio of each element in (A=Co or Ni) calculates the quality of each element, takes copper, antimony, cobalt (nickel), sulfur of required quality respectively as reaction raw material, i.e. copper, antimony, cobalt (nickel), sulfur The ratio of the amount of substance is 3:(1-x):x:3, wherein x=0.05, the mass purity of copper is better than 99.5%, the mass purity of antimony is better than 99.5%, elemental sulfur is analytically pure, elemental cobalt (Nickel) purity 99%;

[0042] 2) Mechanical alloying: Pour the reaction materials described in step 1) into a stainless steel ball mill tank, and perform high-energy ball milling under an inert gas protective atmosphere. The ball milling speed is 450rpm, the ball-to-material ratio is 20, and the ball milling time is 20h;

[0043] 3) Spark plasma sintering: pu...

Embodiment 3

[0047] A preparation of cubic phase Cu 3 Sb 3 A method based on thermoelectric materials, comprising the steps of:

[0048] 1) Ingredients: according to Cu 3 Sb 1-x A x S 3 The ratio of each element in (A=Co or Ni) calculates the quality of each element, takes copper, antimony, cobalt (nickel), sulfur of required quality respectively as reaction raw material, i.e. copper, antimony, cobalt (nickel), sulfur The ratio of the amount of substance is 3:(1-x):x:3, wherein x=0.20, the mass purity of copper is better than 99.5%, the mass purity of antimony is better than 99.5%, elemental sulfur is analytically pure, elemental cobalt (Nickel) purity 99%;

[0049] 2) Mechanical alloying: Pour the reaction materials described in step 1) into a stainless steel ball mill tank, and perform high-energy ball milling under an inert gas protective atmosphere. The ball milling speed is 350rpm, the ball-to-material ratio is 15, and the ball milling time is 30h;

[0050] 3) Hot-press sinteri...

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Abstract

The invention provides a cubic phase Cu 3 Sb 3 Based thermoelectric materials, the general chemical formula is Cu 3 Sb 1‑x A x S 3 , where A is cobalt and / or nickel, and x is 0.025-0.200. By replacing Sb elements with Ni, Co and other elements, a Cu with stable structure and thermodynamic properties is synthesized. 3 Sb 1‑ x A x S 3 Cubic crystal structure. Its preparation method mainly comprises the following steps: 1) batching: according to Cu 3 Sb 1‑x A x S 3 The ratio of each element in the method takes copper, antimony, cobalt (nickel) and sulfur as the reaction raw materials, wherein x=0.025~0.200; Perform high-energy ball milling; 3) Densification: The powder obtained by high-energy ball milling is subjected to spark plasma sintering or hot-pressing sintering to obtain high-density, high-performance cubic phase Cu 3 Sb 3 bulk thermoelectric material. Cu according to the present invention 3 Sb 1‑ x A x S 3 Thermoelectric materials are high-purity cubic phase products with high density, stable thermodynamic performance, excellent thermoelectric performance, abundant and cheap raw material sources, and good feasibility and repeatability of the preparation process.

Description

technical field [0001] The invention belongs to the field of new energy materials, in particular to a cubic phase Cu 3 Sb 3 Based thermoelectric materials, and the synthesis of stable cubic phase Cu by element replacement 3 Sb 3 Preparation method of based thermoelectric materials. Background technique [0002] Energy security is an important part of national security. Adopting new energy conversion and recovery technology to recover part of the heat energy from the waste heat generated in the process of primary energy use is an important way to reduce the consumption of oil and natural gas and ease my country's pressure on foreign oil supply. . Thermoelectric power generation technology is a new energy conversion technology that utilizes the Seebeck effect of semiconductors to realize direct conversion of thermal energy and electrical energy. Among them, thermoelectric materials suitable for medium temperature ranges have important applications in power generation (solar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/16H01L35/18H01L35/34
CPCH10N10/852H10N10/853H10N10/01
Inventor 刘丙国汪舰胡保付徐坚杜保立
Owner HENAN POLYTECHNIC UNIV
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