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

Method for preparing nanometer silicon powder by sol-microemulsion-hydro-thermal system

A technology of nano-silica micropowder and microemulsion, which is applied in the direction of nanotechnology, chemical instruments and methods, silicon compounds, etc., can solve problems such as easy agglomeration and wide particle size distribution, and achieve low reaction temperature, low production cost, and easy control Effect

Inactive Publication Date: 2012-09-12
NANCHANG UNIV
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of wide particle size distribution and easy agglomeration when preparing nano-silica powder by precipitation method, the present invention proposes a sol-microemulsion-hydrothermal composite system to prepare quasi-spherical nano-silica powder with uniform size

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this example, industrial fused silicon powder is used as raw material to prepare nano silicon powder using a silicic acid sol-microemulsion-hydrothermal system. The specific process is as follows.

[0020] 1) Mix angular fused silica powder and sodium carbonate at a molar ratio of 1:3, melt and react at 1000°C for half an hour, cool to room temperature to obtain solid sodium silicate, and grind it into powder.

[0021] 2) Weigh 0.43g (3.5mmol) sodium silicate powder, stir and dissolve in 20mL water in a beaker to form a clear sodium silicate solution. Under rapid and continuous stirring, slowly drop about 1.8mL of hydrochloric acid (4M) to prepare silicic acid sol.

[0022] 3) Add 15mL of n-hexane to the silicic acid sol, stir and mix to form an oil-water layered solution, add 0.6mmol of cetyltrimethylammonium bromide, continue to stir to fully dissolve, the solution becomes cloudy, and stir to mix Add n-hexanol dropwise to the solution until the solution becomes cl...

Embodiment 2

[0026] In this example, industrial fused silicon powder is used as raw material to prepare nano silicon powder using a silicic acid sol-microemulsion-hydrothermal system. The specific process is as follows.

[0027] 1) Mix fused silicon micropowder and sodium carbonate in a molar ratio of 1:3, melt and react at 1000°C for half an hour, cool to room temperature to obtain solid sodium silicate, and grind it into powder.

[0028] 2) Weigh 0.43g (3.5mmol) sodium silicate powder, stir and dissolve in 20mL water in a beaker to form a clear sodium silicate solution. Under rapid and continuous stirring, slowly drop about 1.8mL of hydrochloric acid (4M) to prepare silicic acid sol.

[0029] 3) Add 15mL of n-hexane to the silicic acid sol, stir and mix to form an oil-water layered solution, add 16mL of polyethylene glycol-400, continue stirring to make it fully mixed, and add n-hexanol drop by drop to the mixed solution while stirring , until the solution becomes a clear, uniform silic...

Embodiment 3

[0033] In this example, industrial fused silicon powder is used as raw material to prepare nano silicon powder using a silicic acid sol-microemulsion-hydrothermal system. The specific process is as follows.

[0034] 1) Mix industrial fused silica powder and sodium carbonate at a molar ratio of 1:3, melt and react at 1000°C for half an hour, cool to room temperature to obtain solid sodium silicate, and grind it into powder.

[0035] 2) Weigh 0.43g (3.5mmol) sodium silicate powder, stir and dissolve in 10mL water in a beaker to form a clear sodium silicate solution. Under rapid and continuous stirring, slowly drop about 1.8mL of hydrochloric acid (4M) to prepare silicic acid sol.

[0036] 3) Add 20mL of n-hexane to the silicic acid sol, stir and mix to form an oil-water layered solution, add 6mL of Tween-80, continue to stir to make it fully mixed, and add ethylene glycol drop by drop to the mixed solution while stirring, Until the solution becomes clear and uniform silicic aci...

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

A method for preparing a nanometer silicon powder by a sol-microemulsion-hydro-thermal system comprises technological processes of: preparation of sodium silicate, preparation of a silicic acid sol system, preparation of a four-phase microemulsion system, hydro-thermal system reaction, washing treatment and the like. The method provided by the invention has a simple technology, requires no special equipment, is convenient to operate and easy to control, and requires low production cost and low reaction temperature, and can be popularized for the preparation of nanometer silicon powder with natural powder quartz as a raw material.

Description

technical field [0001] The invention belongs to the field of inorganic material science and technology, and relates to a preparation method of nano silicon micropowder. Background technique [0002] Silica has excellent physical properties such as non-toxic, odorless, non-polluting, good high temperature resistance, acid and alkali corrosion resistance, low thermal expansion coefficient, small thermal conductivity, high insulation, high hardness, rich resources, piezoelectric effect and resonance effect. , Chemical properties. Therefore, silica powder (SiO 2 Micropowder, Silica Fine Powder) has broad application prospects in chemical fields such as plastics, high-grade coatings, high-grade paints, rubber, epoxy resins, and advanced ceramics, as well as electronic and electrical fields such as computer chips, optical fibers, integrated circuits, and solar cells. The quality of microsilica powder products is not only related to its purity, but also its particle size is the d...

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): C01B33/193B82Y40/00
Inventor 雷水金刘磊汪春英周浪
Owner NANCHANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com