Method for super-rapidly preparing high-performance high-silicon-manganese thermoelectric material

A technology of thermoelectric materials and high manganese silicon, which is applied in the direction of thermoelectric device node lead-out materials, metal silicides, etc., can solve the problems of high equipment requirements, long preparation cycle, and difficulty in large-scale application, and achieve low equipment requirements, The effect of abundant reserves and shortened cycle

Active Publication Date: 2014-08-27
WUHAN UNIV OF TECH
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the melting process, due to the slow diffusion rate of Si atoms, it is difficult to complete the peritectic reaction between the previously formed MnSi phase and the Si melt, and it is difficult to obtain a single-phase hig

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for super-rapidly preparing high-performance high-silicon-manganese thermoelectric material
  • Method for super-rapidly preparing high-performance high-silicon-manganese thermoelectric material
  • Method for super-rapidly preparing high-performance high-silicon-manganese thermoelectric material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] A new method for ultra-fast preparation of high-performance high-manganese silicon thermoelectric materials, which includes the following steps:

[0031] 1) Press MnSi 1.75 Weigh Mn powder and Si powder in the stoichiometric ratio of each atom, with a total mass of 2.5g, then grind and mix them evenly, and press the uniformly mixed powder into a cylindrical block with a diameter of 15mm (40MPa holding pressure for 15min) ;

[0032] 2) The block obtained in step 1) is enclosed in a vacuum quartz glass tube, and placed in a vertical furnace with an overall temperature of 1180°C for thermal explosion reaction (TE, Thermal Explosion), taken out after 10 minutes and cooled naturally;

[0033] 3) Grind the above-obtained product into powder, perform plasma activated sintering (PAS, Plasma Activated Sintering), put the powder into a graphite mold with a diameter of 15 mm and compact, and then proceed under the conditions of a vacuum of less than 10 Pa and a sinterin...

Example Embodiment

[0035] Example 2

[0036] A new method for ultra-fast preparation of high-performance high-manganese silicon thermoelectric materials, which includes the following steps:

[0037] 1) Press MnSi 1.75 Weigh Mn powder and Si powder in the stoichiometric ratio of each atom, the total mass is 2.5g, then they are ground and mixed uniformly, and the uniformly mixed powder is pressed into a cylindrical block with a diameter of 15mm (40MPa holding pressure for 15min) ;

[0038] 2) Seal the block obtained in step 1) in a vacuum quartz glass tube, and put it into a vertical furnace with an overall temperature of 1237°C for thermal explosion reaction (TE, Thermal Explosion), take it out after 5 minutes and cool it naturally;

[0039] 3) Grind the above-obtained product into powder, perform plasma activated sintering (PAS, Plasma Activated Sintering), put the powder into a graphite mold with a diameter of 15 mm and compact, and then proceed under the conditions of a vacuum of less than 10 Pa and a...

Example Embodiment

[0041] Example 3

[0042] A new method for ultra-fast preparation of high-performance high-manganese silicon thermoelectric materials, which includes the following steps:

[0043] 1) Press Mn(Al 0.0015 Si 0.9985 ) 1.75 The stoichiometric ratio of each atom, that is, the stoichiometric ratio of Mn, Al and Si is 1:(0.0015*1.75):(0.9985*1.75). Weigh Mn powder, Al powder and Si powder, the total mass is 2.5g, and then They grind and mix uniformly, and press the uniformly mixed powder into a cylindrical block with a diameter of 15mm (40MPa holding pressure for 15min);

[0044] 2) The block obtained in step 1) is enclosed in a vacuum quartz glass tube, and placed in a vertical furnace with an overall temperature of 1237°C for thermal explosion reaction (TE, Thermal Explosion), and after reaction for 10 minutes, take it out and cool it naturally;

[0045] 3) Grind the above-obtained product into powder, perform plasma activated sintering (PAS, Plasma Activated Sintering), put the powder into...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention particularly relates to a method for super-rapidly preparing a high-performance high-silicon-manganese thermoelectric material. The method comprises the following steps: 1) weighing Mn powder, M powder and Si powder according to the stoichiometric ratio of each atom of Mn(MxSi<1-x>)1.75, then grinding raw materials, mixing uniformly and pressing into blocks, wherein M is Al or Ge, x is equal to or greater than 0 and less than or equal to 0.0045 when M is Al, and x is equal to or greater than 0 and less than or equal to 0.01 when M is Ge; 2) initiating the blocks obtained in step 1) to carry out thermal explosion synthesis reaction, and naturally cooling after the reaction is completed to obtain a single-phase high-manganese-silicon compound; 3) grinding the single-phase high-manganese-silicon compound into powder and carrying out spark plasma activation sintering to obtain the high-performance high-silicon-manganese thermoelectric material. The method disclosed by the invention has the advantages of high reaction speed, simple process, efficiency and energy conservation, good repeatability and the like, the whole preparation process can be shortened from above 12 hours required in the traditional method to within 0.5 hour, and the obtained blocks have excellent thermoelectric properties.

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 ultrafast preparation of high-performance high-manganese silicon thermoelectric materials. Background technique [0002] In the international environment where non-renewable fossil energy such as oil, coal, and natural gas is consumed in large quantities and causes energy shortages, the development of green and renewable energy has become the only way for the sustainable and stable development of human society. Thermoelectric conversion technology is a technology that realizes direct mutual conversion between electric energy and thermal energy through the Seebeck effect and Peltier effect of thermoelectric materials. It has the advantages of no transmission parts, small size, no noise, and good reliability. It is used as a Environmentally friendly energy conversion technology has important application prospects in the recovery ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C1/05C22C1/10C22C22/00C22C32/00C01B33/06H01L35/14
Inventor 唐新峰佘晓羽苏贤礼鄢永高
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap