Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method of preparing high-purity ultra-fine sphere silicon micro-powder

A spherical silica powder, high-purity technology, applied in the direction of silicon oxide, silicon dioxide, fibrous fillers, etc., can solve the problems of large output of spherical silica powder, low input-output rate, low spheroidization rate, etc., and achieve production costs Low, small thermal conductivity, high spheroidization effect

Inactive Publication Date: 2007-09-12
袁茂豪
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for preparing high-purity ultrafine spherical silica powder at home and abroad include chemical vapor phase method, chemical precipitation method, high-frequency plasma method, high-temperature melting method, sol-gel method and other chemical preparation methods and mechanical physical preparation methods. The chemical preparation methods all have the problems of large investment, low output, high cost, and low input-output rate. The existing mechanical and physical preparation methods also have problems such as low spheroidization rate and low whiteness.
Therefore, the existing methods for preparing spherical silica powder cannot meet the requirements of high output and high quality of spherical silica powder at the same time.

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

[0010] Embodiment 1: Use natural powder quartz ore powder to remove the hexagonal powder with high hardness through rough separation, and obtain high-quality natural powder quartz ore powder with high spheroidization ratio and high purity. Roughly selected high-quality natural powder quartz ore is washed with water to suspend impurities and mud on the surface, sieved and removed, and then washed with pure water, and then add high-quality natural powder quartz ore with 3% silicon by weight. Stir with sodium phosphate, adjust the pH value of the aged high-quality natural powder quartz ore powder within 9±0.5, make it age, the aging time is 10 hours, after aging, dehydrate, dry and disperse, and make powder Shaped quartz ore powder, or adding an appropriate amount (to make the powdered quartz ore powder in a viscous state after stirring) sodium silicate binder to stir and disperse, (sodium silicate forms nano-scale silicon micropowder through high temperature, in which the oxidize...

Embodiment 2

[0011] Embodiment 2: Use natural powder quartz ore powder to remove hexagonal powder with high hardness through rough separation, and obtain high-quality natural powder quartz ore powder with high spheroidization ratio and high purity. After the rough selection, the high-quality natural powder quartz ore powder is pickled, then alkaline washed, neutralized, impurity removed, sieved, bleached, washed and filtered with pure water to remove impurities, and then 8% of the weight of high-quality natural powder quartz ore powder is added Stir with sodium silicate, adjust the pH value of the aged high-quality natural powder quartz ore powder within 10±0.5, make it aged for 10 hours, its SiO2 content is 99.6%, dehydrate and dry to disperse, and the moisture content is controlled at 0.65% , to make powdery quartz ore powder, or add an appropriate amount (to make the quartz ore powder in a viscous state after stirring) sodium silicate binder and stir, (sodium silicate forms nano-scale si...

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

PropertyMeasurementUnit
whitenessaaaaaaaaaa
spheroidization rateaaaaaaaaaa
Login to View More

Abstract

This invention discloses a method for preparing purified super-fine spherical Si micro-powder, which first of all selects natural quartz breeze roughly, cleans it and adds an aging agent to be aged in an alkali condition and filtered, then dehydrates and dries the filtered matter and processes it to powder or blocks by adding a binder to be burnt under 1280-1680deg.C in a high temperature furnace for 1-10h to be cooled and dispersed to be grinded to powder spheres and graded by magnetic selection and wind selection to get purified super-fine spherical silicon micro-powder.

Description

technical field [0001] The invention relates to a preparation method of quartz powder, in particular to a preparation method of high-purity ultrafine spherical silicon micropowder. Background technique [0002] With the continuous development of science and technology, silicon micropowder used in high-tech industries such as high-grade coatings, advanced fillers, insulating materials, electronic packaging materials, and aerospace requires not only good fluidity, dispersibility, small thermal conductivity, and electrical conductivity. Low and corrosion resistance, and require high quality standards for its silica powder spheroidization rate, whiteness and purity. At the same time, the demand for spherical silica powder used in the above industries is large, and the global market demand is at least 30 billion yuan. At present, the methods for preparing high-purity ultrafine spherical silica powder at home and abroad include chemical vapor phase method, c...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/113
CPCC09C1/30C01B33/12C01P2006/80
Inventor 袁茂豪袁超袁君罗招梅袁茂清
Owner 袁茂豪
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
Eureka Blog
Learn More
PatSnap group products