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

Method for manufacturing ultramicro alumina powder

A technology of fine alumina and alumina is applied in the method of granulating raw materials, chemical instruments and methods, alumina/aluminum hydroxide and other directions, which can solve the problems of difficult industrialization promotion, long process flow and long construction period, etc. Achieve the effect of small investment, short process flow and short construction period

Inactive Publication Date: 2005-09-14
GUIZHOU UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have long process flow, long construction period, large investment, high production cost, and are not easy to be industrialized.

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] a. Ingredients: use γ-alumina as the base material, prepare 3% mineralizer according to the weight of the base material, and 3% dispersant (such as sodium acrylate, etc.) as auxiliary materials; there is no special requirement for the mineralizer. The dispersant is mainly used to reduce the roasting temperature, and it can be used without it. The dispersant is added with 0.5% rare earth compound (such as lanthanum oxide, cerium oxide, etc.) by weight of the dispersant.

[0011] b. Product: Mix γ-alumina and mineralizer evenly, and after conventional roasting, add dispersant to obtain product B.

[0012] c. Grinding: finely grind product B first, and then ultra-finely grind it into particle size d 50 If the powder is no more than 1.5μm, the finished product of α-alumina ultrafine powder can be obtained.

Embodiment 2

[0014] a. Ingredients: α-alumina is used as the base material, and 5% dispersant is prepared according to the weight of the base material as an auxiliary material; 4% rare earth compound of dispersant weight is added to the dispersant; α-alumina and dispersant A product is obtained after mixing;

[0015] b. Grinding: finely grind the product A first, and then ultra-finely grind it to a particle size d 50 If the powder is no more than 1.5μm, the finished product of α-alumina ultrafine powder can be obtained.

Embodiment 3

[0016] Example 3. A method for producing fine alumina powder; it is characterized in that, it is carried out according to the following steps;

[0017] a, batching: take gamma-alumina as the base material, prepare 6% dispersant according to the weight of the base material as an auxiliary material; add 8% rare earth compound of dispersant weight in the dispersant; mix gamma-alumina and dispersant A product is obtained after mixing;

[0018] b. Grinding: finely grind the product A first, and then ultra-finely grind it to a particle size d 50 If the powder is no more than 1.5μm, the finished product of γ-alumina ultrafine powder can be obtained.

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
diameteraaaaaaaaaa
Login to View More

Abstract

A process for preparing superfine aluminium oxide powder includes proportionally mixing alpha-(or gamma) alumina with mineralizer, conventional calcining, adding disperser, mixing, and grinding.

Description

technical field [0001] The invention relates to a preparation method of alumina powder, in particular to a preparation method of ultrafine alumina powder. technical background [0002] Among alumina powders, ultrafine powder refers to micropowder with a diameter of about 1 μm, which has a wide range of applications. The finer the alumina particle size, the lower the sintering temperature. Therefore, ultra-fine alumina has excellent sintering performance and performance. At the same time, it is also a good dispersed phase for preparing dispersion-strengthened materials. Ultrafine alumina powder has been widely used in translucent alumina sintered bodies, phosphor carriers, additives, single crystal materials, high-pressure sodium lamps, physical and chemical instruments, artificial bones, semiconductor material substrates, audio tape fillers, ruby ​​laser materials, Abrasive materials, etc. There are many methods for preparing ultra-fine alumina powder, such as gaseous ev...

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 Patents(China)
IPC IPC(8): B01J2/00C01F7/02
Inventor 陈肖虎陈骏梁杰何力
Owner GUIZHOU 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