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Method for preparing toughened aluminum oxide ceramic based on stereo lithography appearance namely 3D printing

A technology of alumina ceramics and light curing molding, which is applied in the field of 3D printing and can solve problems such as uneven structure

Inactive Publication Date: 2017-05-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a method for preparing alumina ceramics, which is used to solve the technical defect that alumina ceramics mixed with zirconia have uneven structure in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This example is a specific example of preparing alumina ceramic product 1 by using a method for preparing alumina ceramic provided by the present invention.

[0054] Step 1. Preparation of slurry

[0055] Dissolve 20g of solute in 80g of solvent, mix and stir to obtain premix 1. In this embodiment, the solute is methacrylamide, and the solvent is glycerin.

[0056] After mixing 100g of alumina ceramic powder, 300g of ethanol and 1.5g of dispersant, the first product 1 was obtained by ball milling for the first time. In the first ball milling, the ball milling medium is alumina, the diameter of the ball milling medium is 3 mm, the shape of the ball milling medium is spherical, and the material-to-ball ratio is 2:1. In this embodiment, the alumina ceramic powder has a bimodal structure, the purity of the alumina ceramic powder is greater than 99%, and the alumina ceramic powder is α-Al 2 o 3 , the particle size of alumina ceramics is: 0.1-0.5μm; the dispersant is poly...

Embodiment 2

[0072] This example is a specific example of preparing alumina ceramic product 2 by using a method for preparing alumina ceramic provided by the present invention.

[0073] Step 1. Preparation of slurry

[0074] Dissolve 35g of solute in 65g of solvent, mix and stir to obtain premix 2. In this embodiment, the solute is dimethacrylate, and the solvent is glycerin and deionized water.

[0075] After mixing 100g of alumina ceramic powder, 300g of ethanol and 2.0g of dispersant, the first product 2 was obtained by ball milling for the first time. In the first ball milling, the ball milling medium is alumina, the diameter of the ball milling medium is 3 mm, the shape of the ball milling medium is spherical, and the ratio of material to ball is 5:1. In this embodiment, the alumina ceramic powder has a bimodal structure, the purity of the alumina ceramic powder is greater than 99%, and the alumina ceramic powder is α-Al 2 o 3 , the particle size of alumina ceramics is: 0.1-0.5μm;...

Embodiment 3

[0091] This example is a specific example of preparing alumina ceramic product 3 by using a method for preparing alumina ceramic provided by the present invention.

[0092] Step 1. Preparation of slurry

[0093] Dissolve 50 g of solute in 50 g of solvent, mix and stir to obtain premix 3. In this embodiment, the solute is dimethacrylate, and the solvent is deionized water.

[0094] After mixing 100g of alumina ceramic powder, 300g of ethanol and 2.5g of dispersant, the first product 3 was obtained by ball milling for the first time. In the first ball milling, the ball milling medium is zirconia, the diameter of the ball milling medium is 1 mm, the shape of the ball milling medium is spherical, and the ratio of material to ball is 4:1. In this embodiment, the alumina ceramic powder has a bimodal structure, the purity of the alumina ceramic powder is greater than 99%, and the alumina ceramic powder is α-Al 2 o 3 , the particle size of alumina ceramics is: 0.1-0.5μm; the dispe...

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Abstract

The invention belongs to the technical field of 3D printing, and particularly relates to a method for preparing toughened aluminum oxide ceramic based on stereo lithography appearance namely 3D printing. The invention provides a composition. The composition comprises the following raw materials: aluminum oxide ceramic powder, a liquid premix, a photoinitiator, a dispersant and a surfactant. The invention further provides a preparation method for preparing zirconium oxide-toughened aluminum oxide ceramic by using the composition. The preparation method comprises the following steps: preparing a slurry, moulding, drying and degreasing, wherein a blank is dried primarily, degreased and post-treated. According to the technical scheme provided by the invention, the ceramic blank is prepared by stereo lithography appearance, so that the moulding efficiency is high and the dimensional accuracy of the product is high; through optimization of parameters in the degreasing step, the blank does not deform and does not crack in the degreasing process; by an infiltrating step, the growth of aluminum oxide crystal grains is inhibited, and through electronic microscopic observation on the product structure, the microstructure of the product is uniform; the technical defect that in the prior art, the structure of the zirconium oxide-toughened aluminum oxide ceramic is nonuniform is overcome.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for preparing alumina toughened ceramics by 3D printing based on photocuring molding. Background technique [0002] 3D printing technology is Stereo lithography Appearance (SLA for short), its principle is: through the computer to control the laser beam of specific wavelength and intensity to scan on the x-y plane, so that it is sequentially solidified from point to line and from line to surface. , so that the ceramic slurry is selectively solidified to complete the drawing operation of one layer, and then the lifting table moves in the vertical direction by the height of one layer, and then solidifies another layer, so that the layers are stacked to form a ceramic body. However, although alumina ceramic parts with complex structures can be easily prepared by using light-curing molding technology, after the alumina body is sintered, the grains tend to gro...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B35/626C04B35/632B28B1/00B33Y10/00B33Y70/00
CPCC04B35/10B28B1/001B33Y10/00B33Y70/00C04B35/622C04B35/6261C04B35/632C04B2235/3244C04B2235/5445C04B2235/6026C04B2235/616
Inventor 刘伟伍海东伍尚华吴子薇蒋强国黄容基
Owner GUANGDONG UNIV OF TECH
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