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

Stereolithography-based method for preparing silicon nitride ceramic by 3D printing

A technology of silicon nitride ceramic powder and photoinitiator, which is applied in the field of 3D printing, can solve the problems of high preparation cost, uneven finished product, poor product size accuracy, etc.

Inactive Publication Date: 2017-05-24
GUANGDONG UNIV OF TECH
View PDF3 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing silicon nitride ceramics by 3D printing based on light-curing molding, which is used to solve the main problems of the silicon nitride ceramic body in the prior art: uneven finished products, poor dimensional accuracy of products after sintering, and Technical defect of high production cost

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

[0034] Step 1. Preparation of slurry

[0035] 40g of silicon nitride ceramic powder, 0.2g of dispersant and 120g of ethanol were mixed, dried at 60°C after the first ball milling, and powder 1 was obtained. In this embodiment, the ball milling medium for the first ball milling is silicon nitride, the shape of the ball milling medium for the first ball milling is spherical, the diameter of the ball milling medium for the first ball milling is 1mm, and the material-ball ratio of the first ball milling is 1 :1.

[0036] 60g of monomer, 0.2g of dispersant and 1g of defoamer were mixed to obtain premix 1.

[0037] Premix 1, powder 1 and 0.4 g of surface modifier were mixed, and ball milled for the second time to obtain primary slurry 1. In this embodiment, the ball milling medium of the second ball milling is silicon nitride, the shape of the ball milling medium of the second ball milling is spherical, the diameter of the ball milling medium of the second ball milling is 3 mm, an...

Embodiment 2

[0047] Step 1. Preparation of slurry

[0048]45g of silicon nitride ceramic powder, 0.45g of dispersant and 135g of ethanol were mixed, dried at 60°C after the first ball milling, and powder 2 was obtained. In this embodiment, the ball milling medium for the first ball milling is silicon nitride, the shape of the ball milling medium for the first ball milling is spherical, the diameter of the ball milling medium for the first ball milling is 3 mm, and the material-ball ratio of the first ball milling is 2 :1.

[0049] 55g of monomer, 0.2g of dispersant and 0.2g of defoamer were mixed to obtain premix 2.

[0050] Premix 2, powder 2 and 0.2 g of surface modifier were mixed, and ball milled for the second time to obtain primary slurry 2. In this embodiment, the ball milling medium of the second ball milling is silicon nitride, the shape of the ball milling medium of the second ball milling is spherical, the diameter of the ball milling medium of the second ball milling is 3 mm,...

Embodiment 3

[0060] Step 1. Preparation of slurry

[0061] 50g of silicon nitride ceramic powder, 0.5g of dispersant and 150g of ethanol were mixed, dried at 60°C after the first ball milling, and powder 3 was obtained. In this embodiment, the ball milling medium for the first ball milling is silicon nitride, the shape of the ball milling medium for the first ball milling is spherical, the diameter of the ball milling medium for the first ball milling is 5mm, and the material-ball ratio of the first ball milling is 3 :1.

[0062] 50 g of monomer, 0.5 g of dispersant and 0.5 g of defoamer were mixed to obtain premix 3.

[0063] Premix 3, powder 3 and 0.5 g of surface modifier were mixed, and ball milled for the second time to obtain primary slurry 3. In this embodiment, the ball milling medium of the second ball milling is silicon nitride, the shape of the ball milling medium of the second ball milling is spherical, the diameter of the ball milling medium of the second ball milling is 5mm...

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
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a stereolithography-based method for preparing silicon nitride ceramic by 3D printing. The invention provides a composition which is prepared from silicon nitride ceramic powder, monomers, a photoinitiator, a dispersing agent, a surface modifier and a defoaming agent. The invention also provides a preparation method of the silicon nitride ceramic from the composition. In the technical scheme provided by the invention, the raw material selection and proportioning are optimized, so that the method is more suitable for producing silicon nitride ceramic. The prepared silicon nitride ceramic product has the advantages of uniform ceramic particle dispersion, high dimensional accuracy, favorable surface smoothness and higher reliability; and the method has the advantage of high preparation efficiency, and effectively lowers the time cost and manpower cost. The technical scheme provided by the invention overcomes the main technical defects of nonuniform finished product, poor sintered product dimensional accuracy and high preparation cost in the silicon nitride ceramic billet in the prior art.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for preparing silicon nitride ceramics by 3D printing based on light-curing molding. Background technique [0002] Silicon nitride ceramic components are widely used in the fields of machinery, chemical industry and automobiles, such as silicon nitride ceramic gears, turbine rotors, cutting tools and bearings. At present, the forming methods of silicon nitride ceramic parts include: cold isostatic pressing, dry pressing, grouting and hot die casting. Among them, although the dry pressing method has high efficiency, the formed products have problems of density difference and uneven microstructure, and it is not easy to form complex shapes and special-shaped products; the cold isostatic pressing method can obtain high density and high uniformity. However, it is still difficult to form ceramic parts with complex shapes, and the molding efficiency is low and...

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): C04B35/584C04B35/622C04B35/626C04B35/634C04B35/632B33Y70/00B28B1/00B33Y10/00
CPCC04B35/584B28B1/001B33Y10/00B33Y70/00C04B35/622C04B35/6261C04B35/6264C04B35/632C04B35/63424C04B2235/5445C04B2235/5454C04B2235/60C04B2235/963
Inventor 刘伟伍海东伍尚华吴子薇蒋强国李炼
Owner GUANGDONG 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
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