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A method for preparing transparent alumina ceramics by 3D printing based on photocuring

A kind of technology of alumina ceramics and light curing molding, which is applied in the field of inorganic material preparation, and can solve the problems of poor precision, immaturity, and low light transmittance

Active Publication Date: 2020-08-11
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional preparation method of transparent alumina ceramics is usually to prepare ceramic slurry-molding-sintering. However, this preparation method is usually difficult to prepare ceramic materials with complex shapes and structures, which greatly limits the production and application of ceramic materials.
In recent years, some people have proposed the theory of preparing ceramic materials with complex structures through light-curing molding technology, but the practical application is not mature, and there are still many problems, such as poor mechanical properties such as product strength and toughness, and cannot take into account complex structures and Simultaneous realization of mechanical properties, in addition, products usually have poor precision in shape and structure, low light transmittance, etc.

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  • A method for preparing transparent alumina ceramics by 3D printing based on photocuring
  • A method for preparing transparent alumina ceramics by 3D printing based on photocuring
  • A method for preparing transparent alumina ceramics by 3D printing based on photocuring

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preparation example Construction

[0042] The invention provides a method for preparing transparent alumina ceramics, comprising the following steps:

[0043] a) Light-curing the photosensitive alumina ceramic slurry through a light-curing molding machine to obtain a molded green body;

[0044] The exposure time of the photocuring molding is 2-15s, and the layer thickness is 10-100 μm;

[0045] b) thermally degreasing the molded body to obtain a degreased body;

[0046] c) performing cold isostatic pressing on the degreased green body to obtain an intermediate green body;

[0047] d) impregnating the intermediate green body with an impregnation solution to obtain an impregnated green body;

[0048] The impregnation solution is a mixed solution of magnesium salt, yttrium salt and lanthanum salt;

[0049] e) raising the temperature of the impregnated green body to 1300-1650°C at a heating rate of 10-15°C / min and holding it once, and then cooling it down to 800-1000°C at a cooling rate of 10-15°C / min to obtain ...

Embodiment 1

[0089] 100g of alumina ceramic powder, 1g of methyl amyl alcohol and 100g of ethanol were mixed to obtain alumina ceramic powder slurry, and after rotary evaporation treatment, 99g of ceramic powder was obtained; 100g of ethoxylated pentaerythritol tetraacrylate, 1g of polypropylene amide and 1g of polyoxyethylene polyoxypropylene pentaerythritol ether are mixed to obtain photosensitive resin slurry; 1g of polyoxyethylene polyoxypropanol amine ether, 1g of fatty acid polyethylene glycol ester and 1g of stearic acid are mixed to obtain a modified solution. The obtained ceramic powder, photosensitive resin slurry and modifying liquid were mixed, ultrasonically stirred for 10 minutes, and vacuum defoamed for 25 minutes to obtain a photosensitive alumina ceramic slurry with a viscosity of 2500 MPa·s.

[0090] The obtained photosensitive alumina ceramic slurry was subjected to photocuring treatment using a MoonRay photocuring molding machine. The exposure time was controlled to be 6...

Embodiment 2

[0093] 110g of alumina ceramic powder, 1.5g of polyacrylamide and 110g of ethanol were mixed to obtain alumina ceramic powder slurry, and after rotary evaporation treatment, 109g of ceramic powder was obtained; 105g of 1,6-hexanediol diacrylate , 2g fatty acid polyethylene glycol ester and 2g polyoxyethylene polyoxypropanol amine ether are mixed to obtain photosensitive resin slurry; 1g polydimethylsiloxane, 2g polyacrylamide and 2g aluminate coupling agent are mixed , to obtain modified solution. The obtained ceramic powder, photosensitive resin slurry and modifying liquid were mixed, subjected to ultrasonic stirring treatment for 10 minutes, and vacuum defoaming treatment for 25 minutes to obtain a photosensitive alumina ceramic slurry with a viscosity of 2300 MPa·s.

[0094] The obtained photosensitive alumina ceramic slurry was subjected to photocuring treatment using a MoonRay photocuring molding machine, the exposure time was controlled to be 7s, the layer thickness was ...

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Abstract

The invention provides a preparation method for transparent aluminum oxide ceramics. The preparation method comprises the following steps: photocuring and moulding ceramic slurry, degreasing, cold-isostatic-pressing, infiltrating and sintering to prepare the transparent aluminum oxide ceramics. According to the specific preparation process, not only a transparent aluminum oxide ceramics product with complicated shape structure is prepared, but also the mechanical properties, such as the product strength and toughness, can be improved, so the complicated structure and the high mechanical property can be realized at the same time. In addition, the preparation method is capable of preparing the complicated shape structure in high precision, so the product has high transparency.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic materials, in particular to a method for preparing transparent alumina ceramics by 3D printing based on photocuring molding. Background technique [0002] In addition to the characteristics of high temperature resistance, corrosion resistance, high strength, high hardness, high chemical stability and good biocompatibility, transparent alumina ceramics also have functional properties such as light transmission, wave transmission, and laser. , military industry, electronics, semiconductor, medicine and other high-tech fields are widely used. [0003] The traditional preparation method of transparent alumina ceramics is usually to prepare ceramic slurry-molding-sintering. However, this preparation method is usually difficult to prepare ceramic materials with complex shapes and structures, which greatly limits the production and application of ceramic materials. In recent years, some...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/115C04B35/622
CPCC04B35/115C04B35/622C04B2235/3206C04B2235/3225C04B2235/3227C04B2235/616C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/661C04B2235/96
Inventor 刘伟何荣烜伍海东吴子微伍尚华
Owner GUANGDONG UNIV OF TECH