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Environmental-friendly tin telluride-based thermoelectric material and preparation method thereof

An environment-friendly, tin telluride-based technology, applied in the direction of thermoelectric device lead-out wire materials, etc., can solve problems such as safety preparation hazards, achieve stable thermoelectric performance, improve thermoelectric performance, and improve thermoelectric conversion efficiency and output The effect of power

Active Publication Date: 2017-06-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the current high-performance tin telluride-based materials contain toxic elements such as Cd / Hg or active alkaline earth metal elements such as Mg / Ca / Sr, the toxic components limit its wide application, and the active alkaline earth metals bring great benefits to the safe preparation of materials. Hidden danger

Method used

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  • Environmental-friendly tin telluride-based thermoelectric material and preparation method thereof
  • Environmental-friendly tin telluride-based thermoelectric material and preparation method thereof
  • Environmental-friendly tin telluride-based thermoelectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A high-performance and environmentally friendly new tin telluride-based thermoelectric material with the chemical formula Sn 1.03-y mn y Te(Cu 2 Te) x (01.03-y mn y Te(Cu 2 Te) 0.05 Block material, the preparation method is as follows:

[0037] (1) Take different y values, according to the chemical formula Sn 1.03-y mn y Te(Cu 2 Te) 0.05 The stoichiometric ratio of (0<y≤0.14) weighs the elemental raw materials tin Sn, manganese Mn, copper Cu, and tellurium Te with a purity greater than 99.99%, places the raw materials in a quartz tube, and seals the quartz tube under vacuum.

[0038] (2) Suspend the quartz tube containing the raw material in the pit furnace, slowly raise the temperature to 850°C at a rate of 200K / h, keep it warm for 6h, and then rapidly quench and cool to obtain the first ingot;

[0039] (3) heat-treating the first ingot after high-temperature melting and quenching obtained in step (2), slowly raising the temperature to 677°C at a rate of 200K...

Embodiment 2

[0049] An environmentally friendly tin telluride-based thermoelectric material with the chemical formula Sn 1.03-y mn y Te(Cu 2 Te) x , where x=0.01 and y=0.01, which is a semiconductor thermoelectric material.

[0050] A method for preparing an environment-friendly tin telluride-based thermoelectric material, comprising the following steps:

[0051] (1) Vacuum packaging: use the elemental elements Sn, Mn, Cu, and Te with a purity greater than 99.99% according to the chemical formula Sn 1.03-y mn y Te(Cu 2 Te) x The stoichiometric ratio in the batching, and vacuum packaged in a quartz tube, wherein x = 0.01 and y = 0.01;

[0052] (2) Melting quenching: heating the quartz tube containing the raw material, raising the temperature of the quartz tube from room temperature to 850 °C at a rate of 150 °C per hour and keeping it warm for 6 hours, so that the raw material is fully reacted in the molten state, and then quenched to obtain Ingot;

[0053] (3) Annealing and quench...

Embodiment 3

[0057] An environmentally friendly tin telluride-based thermoelectric material with the chemical formula Sn 1.03-y mn y Te(Cu 2 Te) x , where x=0.05 and y=0.14, which is a semiconductor thermoelectric material.

[0058] A method for preparing an environment-friendly tin telluride-based thermoelectric material, comprising the following steps:

[0059] (1) Vacuum packaging: use the elemental elements Sn, Mn, Cu, and Te with a purity greater than 99.99% according to the chemical formula Sn 1.03-y mn y Te(Cu 2 Te) x The stoichiometric ratio in is batched, and vacuum-packaged in a quartz tube, wherein x=0.05 and y=0.14;

[0060] (2) Melting quenching: heating the quartz tube containing the raw material, raising the temperature of the quartz tube from room temperature to 85 °C at a rate of 200 °C per hour and keeping it warm for 6 hours, so that the raw material is fully reacted in the molten state, and then quenched to obtain Ingot;

[0061] (3) Annealing and quenching: th...

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Abstract

The invention relates to an environmental-friendly tin telluride-based thermoelectric material and a preparation method thereof. The chemical general formula of the thermoelectric material is Sn(1.03-y)MnyTe(Cu2Te)x, wherein x is greater than 0 but less than or equal to 0.05, and y is greater than 0 but less than or equal to 0.14. The preparation method comprises the following steps of: by taking a metal single substance, the purity of which is greater than 99%, as a raw material, proportioning according to a stoichiometric ratio of the chemical formula Sn(1.03-y)MnyTe(Cu2Te)x; grinding the raw material into powder through vacuum packaging, high-temperature melting and annealing thermal treatment; and performing hot pressing sintering and slow temperature reduction to obtain a sheet material which is the novel tin telluride-based thermoelectric material with target components. According to the design of the invention, cooperative optimization of the electrical transport performance and the thermal transport performance is realized in a tin telluride material, so as to improve the thermoelectric performance. The invention develops an environmental-friendly Sn(1.03-y)MnyTe(Cu2Te)x novel thermoelectric material which is high in performance, wherein the zT value of the material reaches 1.6 at 900K, which is the highest value of the current SnTe system material; and the material is the environmental-friendly thermoelectric material which has a potential to replace a traditional p-type tin telluride material to realize large-scale commercial application.

Description

technical field [0001] The invention belongs to the technical field of new energy materials, and in particular relates to an environment-friendly 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 Selbeck effect, thermoelectric energy materials realize the mutual conversion of thermal energy and electrical energy through the carrier transport 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] The conversion efficiency of thermoelectric...

Claims

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Application Information

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IPC IPC(8): C04B35/515C04B35/622H01L35/16
CPCC04B35/547C04B35/622C04B2235/40C04B2235/407C04B2235/6581C04B2235/6562C04B2235/9607H10N10/852
Inventor 裴艳中李文郑灵浪
Owner TONGJI UNIV
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