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High manganese silicon-based telluride thermoelectric composite material and preparation method thereof

A composite material, high manganese silicon technology, applied in thermoelectric device node lead wire materials, metal selenide/telluride, thermoelectric device manufacturing/processing, etc., can solve the problem that the ZT value cannot be greatly improved, and the thermal conductivity is high. question

Active Publication Date: 2022-04-19
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intrinsic thermal conductivity of high manganese silicon material is 3.0Wm -1 K -1 , this value is about 8 times that of SnSe single crystal, and 3 to 4 times higher than commercial materials such as bismuth telluride and lead telluride, so its ZT value has not been greatly improved.

Method used

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  • High manganese silicon-based telluride thermoelectric composite material and preparation method thereof
  • High manganese silicon-based telluride thermoelectric composite material and preparation method thereof
  • High manganese silicon-based telluride thermoelectric composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0073] Raw materials: 10.9990g Mn powder, 10.1134g Si powder and 0.1276g Te elemental micron powder.

[0074] Preparation method: prepare according to the method identical with embodiment 1, thus, prepare to have general formula and be (MnSi 1.740±0.015 ) 0.995 (MnTe) 0.005 The high manganese silicon-based telluride thermoelectric composite material, its ZT value reaches the maximum at 773K, which is 0.44.

Embodiment 2

[0076] Raw material: 10.9990g Mn powder and 9.8100g Si powder and 0.7657g Te elemental micron powder.

[0077] Preparation method: prepare according to the method identical with embodiment 1, thus, prepare to have general formula and be (MnSi 1.740±0.015 ) 0.97 (MnTe) 0.03 The high manganese silicon-based telluride thermoelectric composite material, its ZT value reaches the maximum at 773K and 823K, which is 0.60.

Embodiment 3

[0079] Raw materials: 10.9990g Mn powder, 9.1020g Si powder and 2.5522g Te elemental micron powder.

[0080] Preparation method: prepare according to the method identical with embodiment 1, thus, prepare to have general formula and be (MnSi 1.740±0.015 ) 0.90 (MnTe) 0.10 The high manganese silicon-based telluride thermoelectric composite material, its ZT value reaches the maximum at 823K, which is 0.50.

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Abstract

The invention relates to a high-manganese-silicon-based telluride thermoelectric composite material, which is characterized in that it has a chemical composition represented by the following general formula (1): (MnSi 1.740±0.015 ) 1‑x (MnTe) x (1) Among them, x represents the molar ratio of manganese telluride in the high manganese silicon-based telluride thermoelectric composite material, and 0<x≤0.10, and the maximum ZT value of the high manganese silicon-based telluride thermoelectric composite material is 0.40 above.

Description

technical field [0001] The invention relates to a novel thermoelectric material, in particular to a high manganese silicon-based telluride thermoelectric composite material and a preparation method thereof. Background technique [0002] With the rapid development of economy, traditional energy sources such as coal, oil, and natural gas are increasingly exhausted, and it has become a top priority for people to seek new alternative energy sources. At present, 90% of the energy needed by human beings still comes from the combustion of mineral resources, but when people use traditional fossil energy, only 30% to 40% of the fossil energy is converted and utilized, and most of the remaining energy is lost in the form of heat. If the traditional fossil energy can be fully utilized, even if only 10% of the waste heat energy is utilized, the energy saved is not a small value. It can be seen that improving energy utilization efficiency is one of the greenest means of energy acquisiti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/16H01L35/34C22C1/05C22C1/10C22C29/18
CPCC22C1/051C22C1/10C22C29/18H10N10/852H10N10/01C01B19/007C01P2004/64
Inventor 李敬锋李志亮董金峰広纳慎介
Owner TOYOTA JIDOSHA KK