A method of microwave rapid heating melting-liquid nitrogen quenching to prepare high-performance SNTE alloy

A rapid heating and high performance technology, applied in the field of microwave rapid heating melting-liquid nitrogen quenching to prepare high-performance SnTe alloys, can solve problems such as complex components, achieve the effects of preparation process optimization, ensure density, and short sintering time

Active Publication Date: 2020-05-19
ANHUI UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the method of this application can effectively improve the thermoelectric properties of the obtained SnTe-based thermoelectric materials to a certain extent, and obtain high-performance SnTe-based thermoelectric materials, but it requires a certain amount of GeTe materials to be solid-dissolved, and the composition is relatively complex

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  • A method of microwave rapid heating melting-liquid nitrogen quenching to prepare high-performance SNTE alloy
  • A method of microwave rapid heating melting-liquid nitrogen quenching to prepare high-performance SNTE alloy
  • A method of microwave rapid heating melting-liquid nitrogen quenching to prepare high-performance SNTE alloy

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Effect test

Embodiment 1

[0054] A method for preparing a high-performance SnTe alloy by microwave rapid heating and melting-liquid nitrogen quenching in this embodiment specifically includes the following steps:

[0055] Step 1. Raw material preparation and mixing

[0056] Using Sn and Te elemental powders as raw materials, weigh Sn and Te powders according to the molar ratio of each element of SnTe, and then grind and mix them in an agate mortar, adding acetone during the grinding process;

[0057] Step 2: Cold pressing and vacuum sealing

[0058] After the acetone is completely volatilized, the powder is cold-pressed, and the pressure is 8MPa; the cold-pressed sample is placed in a clean quartz tube, and vacuumized. When the vacuum reaches 10 -2 MPa, the quartz tube is flushed with argon gas to achieve the purpose of cleaning, and then vacuumed to 10 -3 MPa, and finally seal the quartz tube with a high-temperature flame gun to ensure that the sample is in a high vacuum state.

[0059] Step 3, mic...

Embodiment 2

[0069] A method for preparing a high-performance SnTe alloy by microwave rapid heating and melting-liquid nitrogen quenching of the present invention specifically comprises the following steps:

[0070] Step 1. Raw material preparation and mixing

[0071] Using Sn and Te elemental powders as raw materials, weigh Sn and Te powders according to the molar ratio of each element of SnTe, and then grind and mix them in an agate mortar, adding acetone during the grinding process;

[0072] Step 2: Cold pressing and vacuum sealing

[0073] After the acetone is completely volatilized, the powder is cold-pressed, and the pressure is 9MPa; the cold-pressed sample is placed in a clean quartz tube, and vacuumized. When the vacuum reaches 10 -2 MPa, the quartz tube is flushed with argon gas to achieve the purpose of cleaning, and then vacuumed to 10 -3 MPa, and finally seal the quartz tube with a high-temperature flame gun to ensure that the sample is in a high vacuum state.

[0074] Step...

Embodiment 3

[0083] A method for preparing a high-performance SnTe alloy by microwave rapid heating and melting-liquid nitrogen quenching of the present invention specifically comprises the following steps:

[0084] Step 1. Raw material preparation and mixing

[0085] Using Sn and Te elemental powders as raw materials, weigh Sn and Te powders according to the molar ratio of each element of SnTe, and then grind and mix them in an agate mortar, adding acetone during the grinding process;

[0086] Step 2: Cold pressing and vacuum sealing

[0087] After the acetone is completely volatilized, the powder is cold-pressed, and the pressure is 7MPa; the cold-pressed sample is placed in a clean quartz tube, and vacuumized. When the vacuum reaches 10 -2MPa, the quartz tube is flushed with argon gas to achieve the purpose of cleaning, and then vacuumed to 10 -2 MPa, and finally seal the quartz tube with a high-temperature flame gun to ensure that the sample is in a high vacuum state.

[0088] Step ...

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Abstract

The invention discloses a method for preparing a high-performance SnTe alloy by microwave rapid heating fusion-liquid nitrogen quenching, and belongs to the field of thermoelectric material preparation. The method is characterized in that a sample is subjected to three-step heating and heat preservation in a microwave muffle furnace, then rapidly taking out the sample, quenching the sample in liquid nitrogen to synthesize the high-purity SnTe alloy, and finally obtaining the compact block body by using a discharge plasma (SPS) sintering technology. According to the method for preparing the high-performance SnTe alloy, the thermoelectric performance of the SnTe alloy can be effectively improved, the obtained SnTe alloy is relatively high in purity, and grains are more uniform and refined.

Description

technical field [0001] The invention belongs to the technical field of preparation of thermoelectric materials, and more specifically relates to a method for preparing a high-performance SnTe alloy by rapid microwave heating and melting-liquid nitrogen quenching. Background technique [0002] With the rapid development of my country's economy, the demand for energy is increasing, and the environmental pollution is becoming more and more serious. Therefore, it is imminent to seek a new energy-saving and environmentally friendly material. Among them, thermoelectric materials use the Seebeck effect, Peltier effect, and Thomson effect to realize the direct conversion of thermal energy and electrical energy. Thermoelectric conversion devices have the characteristics of small size, light weight, long service life, and environmental friendliness. Waste heat and vehicle exhaust are used for power generation and cooling. [0003] Thermoelectric materials are usually measured by the ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C22C1/04C22C13/00C22F1/16B22F3/105
Inventor雷鹰高文圣李雨万润东马雷强郑睿
OwnerANHUI UNIVERSITY OF TECHNOLOGY