Method for preparing photocuring-formed high-density ceramic

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: 2015-12-30
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,...

Method used

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  • Method for preparing photocuring-formed high-density ceramic
  • Method for preparing photocuring-formed high-density ceramic
  • Method for preparing photocuring-formed high-density ceramic

Examples

Experimental program
Comparison scheme
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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 665g deionized water and 160g glycerin as solvent (accounting for 75% of the mass of premix) respectively; 25% of the mass of the premix). 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, Purity 99.99%), 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 initial slurry in a negative pressur...

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; 10% of the mass of the premix). 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 liquid and ball mill for 48 hours to obtain the initial slurry; place the initial slurry in a negative pressure environment and...

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 glycerin as solvent (accounting for 60% of the mass of premix) respectively; 40% of the mass of the premix). 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 negative pressure enviro...

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Abstract

The invention relates to the technical field of ceramic preparation, in particular to a method for preparing photocuring-formed high-density ceramic. According to the method, by optimizing the components and matching of slurry, the slurry is suitable for 3D printing preparation of a high-density ceramic special-shaped piece green body which is complex in structure, and no corresponding mold needs to be especially manufactured. Moreover, when the solid content of the slurry is lower than 40 vol%, the slurry can still be used for manufacturing the high-density ceramic green body, and the relative density of high-density ceramic which is manufactured ultimately can reach up to 99%. The green body is dried in a liquid state drying mode, and thus the method is suitable for manufacturing the high-density ceramic green body which is complex and precise in structure. The two-step degreasing method of vacuum/atmosphere protection latex flow and air latex flow is adopted in the method for conducting latex flow, 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 which is prepared through the method is above 90%, the Vickers hardness is above 12 GPa, and the content of residual carbon is smaller 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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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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