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Tin telluride-based thermoelectric material and preparation method thereof

A thermoelectric material, tin telluride-based technology, applied in the direction of binary selenium/telluride compound, metal selenide/telluride, grain processing, etc., can solve the problems of potential safety hazards, environmental pollution, poor electrical conductivity, etc., and achieve reduction Lattice thermal conductivity, improve electrical conductivity, and solve the effect of poor electrical conductivity

Inactive Publication Date: 2020-08-11
XIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a tin telluride-based thermoelectric material and a preparation method thereof, in which tin telluride is doped with aluminum element, which overcomes the vacancy defect of the material to a certain extent and reduces the crystallinity. The thermal conductivity of the grid improves the electrical conductivity of the material, effectively solves the problems of poor electrical conductivity, potential safety hazards and environmental pollution, and facilitates the promotion and use of tin telluride materials

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  • Tin telluride-based thermoelectric material and preparation method thereof
  • Tin telluride-based thermoelectric material and preparation method thereof

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Embodiment 1

[0024] A tin telluride-based thermoelectric material comprises the following components: tellurium, tin and aluminum, the molar ratio of tellurium, tin and aluminum is 1:1.9:0.06; the purity of tellurium, tin and aluminum is above 99.9%.

[0025] The preparation method of the above-mentioned tin telluride-based thermoelectric material comprises the following steps:

[0026] (1) Weigh tellurium, tin and aluminum respectively in an argon environment and mix them evenly to obtain mixed raw materials, then add them to a ball mill jar, vacuumize and feed the mixed gas, first ball mill at 100rpm for 1 hour, and then grind the balls and mix The mass ratio of raw materials is 1:20, and then ball milled at 400rpm for 15 hours to obtain mixed powder; the mixed gas is a gas mixed with hydrogen and argon at a volume ratio of 5:95; every 2 hours of ball milling, cooling for 15 minutes;

[0027] (2) The mixed powder obtained in step (1) was heated to 550° C. for 2 minutes for plasma sinteri...

Embodiment 2

[0029] A tin telluride-based thermoelectric material comprises the following components: tellurium, tin and aluminum, the molar ratio of tellurium, tin and aluminum is 2:1.98:0.05; the purity of tellurium, tin and aluminum is above 99.9%.

[0030] The preparation method of the above-mentioned tin telluride-based thermoelectric material comprises the following steps:

[0031] (1) Weigh tellurium, tin and aluminum respectively in an argon environment and mix them uniformly to obtain mixed raw materials, then add them to a ball mill jar, vacuumize and feed the mixed gas, first ball mill at 120rpm for 2 hours, and the balls and mix The mass ratio of raw materials is 1:20, and then ball milled at 450rpm for 18 hours to obtain a mixed powder; the mixed gas is a gas mixed with hydrogen and argon at a volume ratio of 5:95; every 2 hours of ball milling, cooling for 15 minutes;

[0032] (2) Plasma sintering the mixed powder obtained in step (1) to 600° C. for 6 minutes, the heating rat...

Embodiment 3

[0034] A tin telluride-based thermoelectric material comprises the following components: tellurium, tin and aluminum, the molar ratio of tellurium, tin and aluminum is 2:2:0.04; the purity of tellurium, tin and aluminum is above 99.9%.

[0035] The preparation method of the above-mentioned tin telluride-based thermoelectric material comprises the following steps:

[0036] (1) Weigh tellurium, tin and aluminum in an argon environment and mix them uniformly to obtain mixed raw materials, then add them to a ball mill jar, and after vacuuming, feed the mixed gas, first ball mill for 2 hours at a speed of 140rpm, and then grind the balls and mix The mass ratio of raw materials is 1:20, and then ball milled at 450rpm for 17 hours to obtain mixed powder; the mixed gas is a mixture of hydrogen and argon at a volume ratio of 5:95; every 2 hours of ball milling, cooling for 15 minutes;

[0037] (2) Plasma sinter the mixed powder obtained in step (1) at 580° C. for 5 minutes, the heating...

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Abstract

The invention provides a tin telluride-based thermoelectric material and a preparation method thereof, the tin telluride-based thermoelectric material comprises the following components: tellurium, tin and aluminum, and the molar ratio of tellurium to tin to aluminum is (1-2): (1.9-2.1): (0.01-0.06). The preparation method of the tin telluride-based thermoelectric material comprises the followingsteps: respectively weighing tellurium, tin and aluminum, uniformly mixing to obtain a mixed raw material, adding the mixed raw material into a ball milling tank, vacuumizing, introducing mixed gas, and carrying out ball milling at the rotating speed of 400-480rpm for 15-20h to obtain mixed powder; and carrying out plasma sintering on the mixed powder to obtain the tin telluride-based thermoelectric material. The aluminum element is doped in the tin telluride, so that the vacancy defect of the material is overcome to a certain extent, the lattice thermal conductivity is reduced, the electricalconductivity of the material is improved, the problems of poor electrical conductivity, potential safety hazards, environmental pollution and the like are effectively solved, and the tin telluride material is convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric material preparation, and in particular relates to a tin telluride-based thermoelectric material and a preparation method thereof. Background technique [0002] With the continuous development of the economy, the energy crisis and environmental pollution continue to intensify, and the research and development of renewable clean energy has attracted much attention. Based on the Seebeck effect, thermoelectric materials realize the mutual conversion of thermal energy and electrical energy through the transport of carriers in the material. Thermoelectric energy conversion devices have the characteristics of no noise, no pollution, and environmental friendliness, and are a type of sustainable and clean energy. It has been widely used in aerospace power supply, industrial waste heat recovery, and automobile exhaust heat utilization. [0003] Lead telluride has been used as a traditional thermoe...

Claims

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Application Information

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IPC IPC(8): C01B19/04B02C17/10B02C17/08B02C17/20B02C23/24
CPCB02C17/08B02C17/10B02C17/20B02C23/24C01B19/007C01P2006/32
Inventor 廖磊蔡芳共黄维刚张勤勇
Owner XIHUA UNIV
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