Method for preparing ultrafine boron carbide granulation powder by combining high-energy ball milling with spray drying technology

A technology of high-energy ball milling and boron carbide, which is applied in the field of high-energy ball milling combined with spray drying technology to prepare ultra-fine boron carbide granulated powder, can solve the problems of high cost and safety problems, and achieve the goal of increasing density, improving efficiency and maintaining uniformity Effect

Inactive Publication Date: 2017-09-01
WUHAN UNIV OF TECH
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of organic solvent spray drying is not only costly but also has safety problems. The development of spray granulation technology for water-based system slurry has become an inevitable trend of ceramic slurry spray granulation, but the application of boron carbide ceramics requires further improvement of related technologies.

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 preparing ultrafine boron carbide granulation powder by combining high-energy ball milling with spray drying technology
  • Method for preparing ultrafine boron carbide granulation powder by combining high-energy ball milling with spray drying technology
  • Method for preparing ultrafine boron carbide granulation powder by combining high-energy ball milling with spray drying technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Each raw material is batched according to the following mass percentages: boron carbide micropowder 20g (D 50 : 2.5~3.5μm), deionized water 20g, lubricant A 0.4g, glycerin 0.2g, dispersant 0.2g, binder A 1g, cyclodextrin 0.2g, water-soluble phenolic resin 2g, propylene glycol 0.02g;

[0025] Put deionized water, lubricant A, glycerin, dispersant, binder A, and cyclodextrin in a polytetrafluoroethylene ball mill tank, add boron carbide balls and place them on a planetary ball mill for ball mill mixing. The ball-to-material ratio is 3:1, the ball milling speed is 300r / min, ball milling 0.5h, then add boron carbide micropowder into the ball milling jar, continue ball milling for 0.5h, then add water-soluble phenolic resin into the ball milling jar and mill for 12h, finally add propylene glycol into the ball milling jar Ball mill for 10 minutes to obtain slurry; the resulting slurry is dried and granulated with a spray drying granulator, and the inlet temperature of the spr...

Embodiment 2

[0028] Each raw material is batched according to the following mass percentages: boron carbide micropowder 20g (D 50 : 2.5~3.5μm), deionized water 18g, lubricant A 0.4g, glycerin 0.2g, dispersant 0.2g, binder A 1g, cyclodextrin 0.2g, water-soluble phenolic resin 2g, propylene glycol 0.02g;

[0029] Put deionized water, lubricant A, glycerin, dispersant, binder A, and cyclodextrin in a polytetrafluoroethylene ball mill tank, add boron carbide balls and place them on a planetary ball mill for ball mill mixing. The ball-to-material ratio is 4:1, ball milling speed is 300r / min, ball milling 0.5h, then add boron carbide micropowder into the ball milling jar, continue ball milling for 0.5h, then add water-soluble phenolic resin into the ball milling jar and mill for 18h, finally add propylene glycol into the ball milling jar Ball mill for 10 minutes to obtain slurry; the obtained slurry is dried and granulated with a spray drying granulator, and the inlet temperature of the spray dr...

Embodiment 3

[0032] Each raw material is batched according to the following mass percentages: boron carbide micropowder 20g (D 50 : 2.5~3.5μm), deionized water 15g, lubricant A 0.4g, glycerin 0.2g, dispersant 0.2g, binder A 1g, cyclodextrin 0.2g, water-soluble phenolic resin 2g, propylene glycol 0.02g;

[0033] Put deionized water, lubricant A, glycerin, dispersant, binder A, and cyclodextrin in a polytetrafluoroethylene ball mill tank, add boron carbide balls and place them on a planetary ball mill for ball mill mixing. The ball-to-material ratio is 4:1, ball milling speed is 300r / min, ball milling 0.5h, then add boron carbide micropowder into the ball milling jar, continue ball milling for 0.5h, then add water-soluble phenolic resin into the ball milling jar and mill for 18h, finally add propylene glycol into the ball milling jar Ball mill for 10 minutes to obtain slurry; the obtained slurry is dried and granulated with a spray drying granulator, and the inlet temperature of the spray dr...

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
angle of reposeaaaaaaaaaa
densityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing ultrafine boron carbide granulation powder by combining high-energy ball milling with a spray drying technology. The method comprises the following steps: firstly, burdening; secondly, preparing slurry: putting deionized water, a lubricant A, a lubricant B, a dispersing agent, a binder A and a binder B into a polytetrafluoroethylene ball mill tank, adding ball milling beads on a planetary ball mill to carry out ball milling mixing, then adding boron carbide micropowder into the ball mill tank and continuously carrying out ball milling for 0.5 hour, and then adding a binder C into the ball mill tank and carrying out ball milling for 12 to 18 hours; finally, adding a defoaming agent into the ball mill tank and carrying out ball milling for 10 minutes to obtain the slurry; thirdly, carrying out spray drying granulation: carrying out drying granulation on the slurry by using a spray drying granulator to obtain the ultrafine boron carbide granulation powder. According to the preparation method disclosed by the invention, the spherical granulation powder is obtained by combining wet high-energy ball milling with the spray granulation technology; the obtained powder is helpful to the forming of the boron carbide powder and the improvement on relative density of a biscuit.

Description

technical field [0001] The invention relates to a method for preparing powder materials, in particular to a method for preparing superfine boron carbide granulated powder by combining high-energy ball milling with spray drying technology. Background technique [0002] Boron carbide has a high B-C covalent bond and a low self-diffusion coefficient. The extremely strong covalent bond endows boron carbide ceramics with excellent properties, such as: ultra-high hardness and wear resistance, high melting point, etc. But at the same time, it reduces its sintering performance and increases the difficulty of sintering densification. [0003] The pressureless sintering method can prepare various products with large size and complex shape at a relatively low cost, which is suitable for mass production and has industrialization prospects. However, the covalent bond of boron carbide is extremely strong, the self-diffusion coefficient is very low, the grain boundary movement is difficu...

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): C04B35/563C04B35/626C04B35/634C04B35/636
CPCC04B35/563C04B35/62695C04B35/63416C04B35/63476C04B35/636C04B2235/77C04B2235/95
Inventor 王为民许晓晖何强龙王爱阳
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