Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method of preparing high-purity nano skutterudite thermoelectricity compound powder by non-water coprecipitation

A technology of skutterudite and co-precipitation, which is applied in the field of preparation of nano-skutterudite thermoelectric compound powder, can solve the problems of poor repeatability, inability to effectively reduce thermal conductivity, and large particle size of nano-powder, and achieve easy Effects of handling, narrow particle size distribution range, fine particle size

Inactive Publication Date: 2007-10-24
WUHAN UNIV OF TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the microstructural scales of the skutterudite compounds prepared by the current preparation technology are micron and submicron, which cannot effectively reduce the thermal conductivity and improve the thermoelectric performance.
[0004] The preparation of nanopowder by co-precipitation method is generally carried out in aqueous solution. After the precipitation is obtained, it is repeatedly filtered and washed to remove the soluble ions in it, and then heat-treated. The particle size of the finally obtained nanopowder is large and can be repeated. poor sex

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 of preparing high-purity nano skutterudite thermoelectricity compound powder by non-water coprecipitation
  • Method of preparing high-purity nano skutterudite thermoelectricity compound powder by non-water coprecipitation
  • Method of preparing high-purity nano skutterudite thermoelectricity compound powder by non-water coprecipitation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: (preparation of CoSb 3 compound nanopowder)

[0023] As shown in Figure 1, with 1.4276g CoCl 2 ·6H 2 O and 4.1061 g SbCl 3 As the initial raw material, it was dissolved in 70ml absolute ethanol solution to form A solution; 4.3821g NaOH was used as precipitating agent, dissolved in 50ml absolute ethanol solution to form B solution. Slowly add solution B to solution A while stirring to produce very fine gray-green precipitates, and obtain a precursor mixed solution containing precipitates. The precursor mixed solution containing the precipitate was directly dried and ground into a powder, and then the ground powder was placed in a tube atmosphere furnace, under H 2 Under the atmosphere, heat up to 300-600°C for reduction heat treatment. After holding time for 0.5-3h, cool with the furnace. The obtained powder (black powder) is filtered with deionized water, washed, and vacuum-dried to obtain nano-square cobalt Mineral compound powder. Fig. 2 is the X-r...

Embodiment 2

[0024] Embodiment 2: (preparation of Ni 0.5 co 3.5 Sb 12 compound nanopowder)

[0025] With 0.1782g NiCl 2 ·6H 2 O, 1.2491 g CoCl 2 ·6H 2 O and 4.1060 g SbCl 3 As the initial raw material, it was dissolved in 70ml absolute ethanol solution to form A solution; 4.3653g NaOH was used as a precipitating agent, dissolved in 50ml absolute ethanol solution to form B solution. Slowly add solution B to solution A while stirring to produce very fine gray-green precipitates, and obtain a precursor mixed solution containing precipitates. The precursor mixed solution containing the precipitate was directly dried and ground into a powder, and then the ground powder was placed in a tube atmosphere furnace, under H 2 Under the atmosphere, heat up to 300-600°C for reduction heat treatment. After holding time for 0.5-3h, cool with the furnace. The obtained powder is filtered with deionized water, washed, and vacuum-dried to obtain high-purity nano-skutterudite Ni. 0.5 co 3.5 Sb 12 co...

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 discloses a making method of thermoelectric compound powder of nanometer skutterudite, which comprises the following steps: (1) adopting chloride of atom M and chloride of atom X as original material with chemical structure formula of the thermoelectric compound powder of nanometer skutterudite at MX3; setting the molar rate of M and X at 1 / (2. 8-3. 1); setting the weight rate of sediment NaOH and chloride at 0. 5-1. 2:1; allocating the molar density of original material of chloride and NaOH sediment at 0. 1-1mol / L in the anhydrous alcohol; (2) dissolving original material of chloride and NaOH sediment in the anhydrous alcohol; obtaining the composite predecessor solution with sediment; (3) drying; grinding; powdering; (4) reducing heat disposal; filtering; washing; drying in the vacuum; obtaining the product. The invention reduces grain size of thermoelectric compound powder of nanometer skutterudite with even phase and high phase, which possesses good repeatability, simple technical course and simple operation.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a preparation method of nano-skutterudite thermoelectric compound powder. Background technique [0002] Thermoelectric conversion technology is a new type of environmentally friendly power generation and refrigeration technology that is becoming more and more important in the field of new energy. It shows broad application prospects in thermoelectric power generation and thermoelectric refrigeration. It is an indispensable aspect for the sustainable development of mankind in the 21st century One of the important technical foundations that is missing. Thermoelectric materials are the core substances in thermoelectric conversion technology. At present, skutterudite thermoelectric compounds are a new type of medium-temperature thermoelectric materials with excellent thermoelectric properties that have attracted widespread attention. It is named for its origin in the ...

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): C01G53/00C01G51/00C01G49/00C01G30/00C01G28/00
Inventor 唐新峰褚颖陈玉立徐源张清杰
Owner WUHAN UNIV OF TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com