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A method for rapidly preparing antimony telluride thermoelectric materials

A thermoelectric material, antimony telluride technology, applied in the direction of binary selenium/tellurium compounds, etc., can solve the problems of difficult to control composition, energy consumption, low chemical yield and other problems, achieve fast reaction speed, avoid volatilization, and good repeatability Effect

Active Publication Date: 2018-05-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the melting method and the zone melting method have the problems of difficult composition control, long preparation cycle, time-consuming, and energy consumption; the mechanical alloying method has the problem of easy introduction of impurities; the melt spinning method has the problem of being difficult to mass-produce; The chemical method has problems such as low yield and difficulty in controlling the composition

Method used

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  • A method for rapidly preparing antimony telluride thermoelectric materials
  • A method for rapidly preparing antimony telluride thermoelectric materials
  • A method for rapidly preparing antimony telluride thermoelectric materials

Examples

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Embodiment 1

[0030] A method for rapidly preparing antimony telluride thermoelectric materials, the preparation method comprising the following steps:

[0031] 1) According to Sb 2 Te 3 The stoichiometric ratio of each element in takes by weighing Sb powder and Te powder, and total mass is 4g, grinds and mixes then, obtains mixed raw material;

[0032] 2) The mixed raw material obtained in step 1) is subjected to discharge plasma activation sintering, the specific process is: the mixed raw material is packed into a graphite mold with an inner diameter of 16mm for compaction, and then under the condition that the vacuum degree is less than 10Pa and no sintering pressure is applied, Heating to 400°C at a heating rate of 60°C / min, holding for 10 minutes, then rapidly pressurizing to 30MPa, holding for 10 minutes and sintering to obtain dense single-phase antimony telluride (Sb 2 Te 3 ) thermoelectric materials.

[0033] The product obtained in this embodiment is analyzed by X-ray diffract...

Embodiment 2

[0035] A method for rapidly preparing antimony telluride thermoelectric materials, the preparation method comprising the following steps:

[0036] 1) According to Sb 2 Te 3 The stoichiometric ratio of each element in takes by weighing Sb powder and Te powder, and total mass is 4g, grinds and mixes then, obtains mixed raw material;

[0037] 2) The mixed raw material obtained in step 1) is subjected to discharge plasma activation sintering, the specific process is: the mixed raw material is packed into a graphite mold with an inner diameter of 16mm for compaction, and then under the condition that the vacuum degree is less than 10Pa and no sintering pressure is applied, Heating to 410°C at a heating rate of 70°C / min, holding for 10 minutes, then rapidly pressurizing to 30MPa, holding for 10 minutes and sintering to obtain dense single-phase antimony telluride (Sb 2 Te 3 ) thermoelectric materials.

[0038] figure 2 It is the XRD spectrum of the product obtained in this emb...

Embodiment 3

[0040] A method for rapidly preparing antimony telluride thermoelectric materials, the preparation method comprising the following steps:

[0041] 1) According to Sb 2 Te 3 The stoichiometric ratio of each element in takes by weighing Sb powder and Te powder, and total mass is 4g, grinds and mixes then, obtains mixed raw material;

[0042] 2) The mixed raw material obtained in step 1) is subjected to discharge plasma activation sintering, the specific process is: the mixed raw material is packed into a graphite mold with an inner diameter of 16mm for compaction, and then the vacuum degree is less than 10Pa and the sintering pressure is not applied. Heating at a heating rate of 60°C / min to 380°C, holding for 15 minutes, then quickly pressurizing to 40MPa, holding for 5 minutes and sintering to obtain dense single-phase antimony telluride (Sb 2 Te 3 ) thermoelectric materials.

[0043] image 3 It is the XRD spectrum of the product obtained in this embodiment, and the figur...

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Abstract

The invention discloses a method for quickly preparing Sb2Te3 thermoelectric materials, which comprises the following steps: 1) weighing Sb powder and Te powder according to the stoichiometric ratio of each element in Sb2Te3, and then grinding and mixing them evenly to obtain a mixed raw material; 2) taking Step 1) The obtained mixed raw material is subjected to spark plasma activation and sintering to obtain a dense single-phase Sb2Te3 thermoelectric material. The invention has the advantages of fast response speed, high efficiency and energy saving, good repeatability and the like, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of preparation of new energy materials, and in particular relates to a method for rapidly preparing antimony telluride thermoelectric materials. Background technique [0002] In recent years, with the rapid population expansion and rapid industrial development, energy and environmental problems have gradually become prominent. The research, development and application of environmentally friendly and renewable new energy have become the focus of common attention all over the world. Scientists from all over the world are committed to finding efficient and non-polluting new energy conversion and utilization methods to achieve the purpose of rational and effective use of industrial waste heat and waste heat, vehicle exhaust, geothermal, solar energy, and ocean temperature differences. Since the 1990s, the study of thermoelectric conversion materials has become a research hotspot in material science. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04
Inventor 唐新峰姚振国鲁强兵黎萌苏贤礼鄢永高
Owner WUHAN UNIV OF TECH
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