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A kind of preparation method of light-cured high-density ceramics

A light-curing molding and ceramic technology, which is applied in the field of ceramic preparation, can solve the problems of long production cycle, complex and precise ceramic body shape, and high production cost, so as to reduce the production cycle, solve the deformation of the green body, and uniform shrinkage in all directions Effect

Active Publication Date: 2018-03-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problems of high production cost and long production cycle due to the production of high-density ceramics with complex structure by the existing ceramic preparation method, and the difficulty in producing complex and precise ceramics due to the large deformation of the green body. To solve the problem of ceramics, provide a method for preparing high-density ceramics formed by light curing

Method used

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  • A kind of preparation method of light-cured high-density ceramics
  • A kind of preparation method of light-cured high-density ceramics
  • A kind of preparation method of light-cured high-density ceramics

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Embodiment 1

[0035] This embodiment provides a method for preparing a light-cured high-density ceramic, and the specific steps are as follows:

[0036] (1) Preparation of slurry

[0037] Preparation of premix: take by weighing 665g deionized water and 160g glycerin as solvent (accounting for 75% of the mass of premix) respectively; Accounting for 25% of the mass of the master mix). Mix the organic solute and the solvent evenly to dissolve all the organic solute to obtain 1100 g of a slightly yellowish transparent premixed solution.

[0038] Slurry preparation: take the above-mentioned premix solution (38.85%), and weigh 30g polyvinylpyrrolidone (dispersant, 1.06%), 1700g α-alumina (ceramic powder, 60%; particle diameter≤0.2μm, 99.99% purity), 1.5 g 2-hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator 1173, 0.05%). Add dispersant to the premixed liquid and mix evenly, then add ceramic powder to the premixed liquid and ball mill for 8 hours to obtain the initial slurry; place the initi...

Embodiment 2

[0050] This embodiment provides a method for preparing a light-cured high-density ceramic, and the specific steps are as follows:

[0051] (1) Preparation of slurry

[0052] Preparation of premix: take 930g deionized water and 60g glycerin as solvent (accounting for 90% of the mass of premix) respectively; take by weighing 104.5g acrylamide and 5.5g N-N' methylenebisacrylamide respectively as organic solute ( Accounting for 10% of the mass of the master mix). Mix the organic solute and the solvent evenly to dissolve all the organic solute to obtain 1100 g of a slightly yellowish transparent premixed solution.

[0053] Slurry preparation: take the above premix (23.26%), and weigh 100g ammonium citrate (dispersant, 2.1%), 3500g α-alumina (ceramic powder, 74%; particle diameter≤0.5μm, purity is 99.99 %), 30 g of 2-hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator 1173, 0.63%). Add dispersant to the premixed liquid and mix evenly, then add ceramic powder to the premixed liq...

Embodiment 3

[0065] This embodiment provides a method for preparing a light-cured high-density ceramic, and the specific steps are as follows:

[0066] (1) Preparation of slurry

[0067] Preparation of premix: take by weighing 440g deionized water and 220g glycerol as solvent (accounting for 60% of the mass of premix) respectively; Accounting for 40% of the mass of the master mix). Mix the organic solute and the solvent evenly to dissolve all the organic solute to obtain 1100 g of a slightly yellowish transparent premixed solution.

[0068] Slurry: Take the above premix (59.46%), and weigh 1g of ammonium citrate (dispersant, 0.05%) and 734g of α-alumina (ceramic powder, 39.68%; particle diameter≤0.1μm, purity 99.99%) %), 15 g of 2-hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator 1173, 0.81%). Add dispersant to the premixed liquid and mix evenly, then add ceramic powder to the premixed liquid and ball mill for 3 hours to obtain the initial slurry; place the initial slurry in a negat...

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Abstract

A method for preparing photocuring-formed high-density ceramic. In the method, by optimizing components and ratios of slurry, the slurry is suitable for a 3D printing device for a high-density ceramic specially-shaped piece green body that has a complex shape, and no corresponding mold needs to be especially prepared. Moreover, when the solid content of the slurry is lower than 40 vol%, the slurry can still be used for preparing the high-density ceramic green body, and the relative density of the finally-prepared high-density ceramic can exceed 99%. The green body is dried in a liquid state drying manner, and thus the method is suitable for preparing the high-density ceramic green body having a complex and precise structure. In the method, binder discharging is carried out by using a two-step degreasing method comprising vacuum / atmosphere protection binder discharging and air binder discharging, and therefore the defects of deformation, cracking, blistering and the like of the green body can be reduced. The relative density of the high-density ceramic that is prepared by means of the method exceeds 90%, the Vickers hardness exceeds 12 GPa, and the content of residual carbon is lower than 0.5 wt%.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, in particular to a method for preparing photocured high-density ceramics. Background technique [0002] Due to their excellent properties such as high strength, high hardness, corrosion resistance, wear resistance, chemical stability and biocompatibility, special ceramic materials have been widely used in energy, aviation, machinery, chemical industry, electronics, semiconductor, medicine and other fields. More and more applications. Due to the problems of complicated process equipment, long production time, and high production cost in the manufacture of complex-shaped precision special ceramics by traditional ceramic manufacturing processes, the preparation of special ceramics by traditional ceramic manufacturing processes has been unable to keep up with the growing research and development of special ceramic products today. and usage requirements. Especially for high-density ceram...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/634C04B35/622
CPCC04B35/622C04B35/634
Inventor 伍尚华周茂鹏刘伟伍海东程利霞古尚贤
Owner GUANGDONG UNIV OF TECH
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