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Method for preparing Cu2Se thermoelectric material

A technology of thermoelectric materials and wet ball milling, which is applied in the direction of thermoelectric device junction lead-out materials, thermoelectric device manufacturing/processing, chemical instruments and methods, etc., can solve the problems of long production cycle and high production cost, and achieve short production cycle , produce a low, mixed effect

Pending Publication Date: 2020-07-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For existing Cu 2 The preparation method of Se thermoelectric material has shortcomings such as high production cost and long production cycle. The invention provides a method for preparing Cu 2 The method of Se thermoelectric material, the method adopts the technical process of wet ball milling-microwave synthesis-wet ball milling-rapid hot pressing, has the advantages of uniform mixing, fast heating rate, short production cycle, simple process, low production cost and energy consumption, The operation is convenient, the resulting product has high density, and has the advantages of mass production

Method used

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  • Method for preparing Cu2Se thermoelectric material
  • Method for preparing Cu2Se thermoelectric material
  • Method for preparing Cu2Se thermoelectric material

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Embodiment 1

[0040] 1. Weigh copper powder and selenium powder with a purity of 99.99%. Among them, copper powder weighs 2.467g, selenium powder weighs 1.533g, and the total mass is 4g. Put the copper powder and selenium powder into a ball mill jar, add absolute ethanol, set the ball-material ratio to 50:1, the rotating speed to 300r / min, and the ball milling time to 20-30 minutes. Dry after ball milling, put the powder into a φ12mm cold-press mold, and cold-press at room temperature and 40MPa for 5 minutes to obtain a block.

[0041] 2. Place the obtained briquette in a quartz tube coated with carbon on the inner wall, and seal it after vacuuming, keeping the vacuum degree below 0.01Pa. Spread a layer of refractory cotton evenly around and at the bottom of the inner wall of the corundum crucible, and then add 10g of graphite powder with a purity of 99.9% and a particle size of 100 mesh and 3g of quartz sand with a particle size of 20 mesh to 40 mesh as wave-absorbing materials. The tube...

Embodiment 2

[0048] 1. Weigh copper powder and selenium powder with a purity of 99.99%. Among them, copper powder weighs 2.467g, selenium powder weighs 1.533g, and the total mass is 4g. Put copper powder and selenium powder into a ball mill jar, add absolute ethanol, set the ball-to-material ratio to 40:1, the rotational speed to 200r / min, and the mixing time to 20-30 minutes. Dry after ball milling, put the powder into a φ12mm cold press mold, and cold press at room temperature and 50MPa for 5 minutes to obtain a block.

[0049] 2. Place the obtained briquette in a quartz tube coated with carbon on the inner wall, and seal it after vacuuming, keeping the vacuum degree below 0.01Pa. Spread a layer of refractory cotton evenly around the inner wall and bottom of the corundum crucible, and then add 10g of graphite powder with a purity of 99.9% and a particle size of 200 mesh and 3g of quartz sand with a particle size of 20-40 mesh as wave-absorbing materials. Embed the sealed vacuum quartz ...

Embodiment 3

[0053] 1. Weigh copper powder and selenium powder with a purity of 99.99%. Among them, copper powder weighs 2.467g, selenium powder weighs 1.533g, and the total mass is 4g. Put copper powder and selenium powder into a ball mill jar, add absolute ethanol, set the ball-to-material ratio to 60:1, the rotational speed to 100 r / min, and the mixing time to 20-30 minutes. Dry after ball milling, put the powder into a φ12mm cold press mold, and cold press at room temperature and 50MPa for 5 minutes to obtain a block.

[0054] 2. Place the obtained briquette in a quartz tube coated with carbon on the inner wall, and seal it after vacuuming, keeping the vacuum degree below 0.01Pa. Spread a layer of refractory cotton evenly around the inner wall and bottom of the corundum crucible, and then add 10g of graphite powder with a purity of 99.9% and a particle size of 200 mesh and 3g of quartz sand with a particle size of 20-40 mesh as wave-absorbing materials. Embed the sealed vacuum quartz...

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Abstract

The invention discloses a method for preparing a Cu2Se thermoelectric material. According to the method, the technological process of wet ball milling, microwave synthesis, wet ball milling and rapidhot pressing is utilized to rapidly prepare the Cu2Se block material. According to the method, the raw materials are uniformly mixed, the heating rate is high, the synthesis time is short, the processoperation is simple, the energy consumption is low, the production cost is low, the production period is short, the equipment requirement is simple, the high-purity impurity-phase-free Cu2Se block material can be obtained, the preparation efficiency of the thermoelectric material is greatly improved, and the method is suitable for large-scale production and preparation.

Description

technical field [0001] The present invention relates to a kind of Cu 2 The preparation method of Se thermoelectric material, specifically relates to a kind of Cu with simple process and less time-consuming 2 The invention discloses a method for preparing Se thermoelectric semiconductor materials, belonging to the technical field of new energy materials. Background technique [0002] Thermoelectric material is an energy material that can realize mutual conversion of thermal energy and electrical energy. Its Seebeck effect can convert thermal energy into electrical energy. The value is the most important dimensionless parameter to measure thermoelectric materials, ZT=σS 2 T / κ, where σ is the electrical conductivity, S is the Seebeck coefficient, T is the absolute temperature, and κ is the total thermal conductivity. The advantages of thermoelectric materials are that there is no mechanical movement, high reliability, and long life. They are important materials in the field...

Claims

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Application Information

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IPC IPC(8): H01L35/34H01L35/16C01B19/00
CPCC01B19/007H10N10/852H10N10/01
Inventor 赵德刚王永鹏王文莹李福金王磊
Owner UNIV OF JINAN