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High-solid-phase-content aluminum oxide photosensitive ceramic material and preparation method thereof

A technology of alumina ceramics and photosensitive ceramics, applied in the field of 3D printing, can solve the problems of increasing energy consumption, difficult to promote the process, unable to meet different needs and so on

Active Publication Date: 2021-03-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the post-processing process of the green body is very cumbersome. First, in order to make a complex and precise high-density ceramic body, the green body must be dried in a liquid drying method; secondly, vacuum is used to reduce defects such as deformation, cracking, and foaming of the green body. / The two-step degreasing method of atmosphere protection degumming and air degumming is used for degumming, which increases energy consumption and makes it difficult to promote the process
[0005] In summary, the above-mentioned composite photosensitive ceramic materials based on light-curing 3D printing technology still have the following problems: the solid content of ceramics in the material is low, which is not conducive to precise forming on 3D printing equipment; but when the solid content is increased, the fine powder of ceramics in the organic resin It is difficult to disperse evenly, which affects the final quality of parts
Moreover, the state of ceramic printing materials prepared by the same resin system is fixed, which cannot meet the different needs of various ceramic 3D printing

Method used

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  • High-solid-phase-content aluminum oxide photosensitive ceramic material and preparation method thereof

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preparation example Construction

[0039]The invention discloses a method for preparing a photosensitive alumina photosensitive ceramic material with a high solid phase content. In order to increase the solid content and reduce the viscosity and solve the problem of uniform dispersion of the powder in the ceramic photosensitive material, the ceramic powder is pretreated and the powder is mixed with the photosensitive pretreatment method. Adding a specific dispersant when the mixed liquid is mixed; and adjusting the mass ratio of the surfactant and dispersant used in the pretreatment to obtain ceramic photosensitive materials in different states with the same solid content, including the following steps:

[0040] S1: Disperse the alumina ceramic powder into surfactant dilution for modification treatment, obtain the modified ceramic powder after drying and ball milling;

[0041] Include in described step S1:

[0042] First, mix the surfactant (unsaturated organic acid stearic acid, carboxylic acid, oleic acid, et...

Embodiment 1

[0055] (1) Modification of alumina ceramic powder: take 80g alumina powder (particle size 0.2~3μm, purity 99.9%), 0.8g oleic acid, and 160g absolute ethanol; first add oleic acid and absolute ethanol to the Erlenmeyer flask Neutralize and stir evenly, then add the alumina powder into the surfactant diluent, and react with magnetic stirring at 70°C for 30 minutes; after the end, wash the modified powder and dry it at 80°C; finally, ball mill the powder for 1 to 2 hours at a speed of 200r / min to obtain modified alumina powder.

[0056] (2) Preparation of photosensitive premix: take 2.9g of isooctyl acrylate, 8.7g of ethoxylated trimethylolpropane triacrylate, 3.3g of trimethylolpropane triacrylate, 1,6-hexanediol Diacrylate 0.16g, 2,2,4-trimethylpentanediol isobutyl ester 4.4g, photoinitiator (184) 0.26g; 1.6g dispersant (polyester amide) and polymerization inhibitor were added in proportion In a beaker, ultrasonically disperse at 25°C for 20 minutes to prepare a photosensitive...

Embodiment 2

[0059] (1) Modification of alumina ceramic powder: take 800g alumina powder (particle size 0.2~3μm, purity 99.9%), 32g oleic acid, 1600g dehydrated ethanol respectively; add oleic acid and dehydrated ethanol in the Erlenmeyer flask first and stir evenly, then add the alumina powder into the diluent of the surfactant, and react with magnetic stirring at 70°C for 30 minutes; after the end, wash the modified powder and dry it at 80°C; finally, ball mill the powder for 1-2 hours at a speed of 200r / min to obtain modified alumina powder.

[0060] (2) Preparation of photosensitive premix: Take 29.6g of isooctyl acrylate, 86.7g of ethoxylated trimethylolpropane triacrylate, 32.92g of trimethylolpropane triacrylate, 1,6-hexanediol Diacrylate 1.64g, 2,2,4-trimethylpentanediol isobutyl ester 43.9g, benzoin dimethyl ether 2.6g (photoinitiator 651); 16g dispersant (polyester amide) and proportional The polymerization inhibitor was added into the beaker, and ultrasonically dispersed at 25...

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Abstract

The invention discloses a high-solid-phase-content aluminum oxide photosensitive ceramic material and a preparation method thereof. The preparation method comprises the following steps of: dispersingaluminum oxide ceramic powder into a surfactant dilute solution for modification treatment, and then performing drying and ball milling to obtain modified ceramic powder; mixing photosensitive resin,a plasticizer, a polymerization inhibitor, a dispersing agent and a photoinitiator to prepare a photosensitive premixed solution; and adding the modified ceramic powder into the premixed solution, fully dispersing the substance, and removing bubbles to obtain the high-solid-phase-content aluminum oxide photosensitive ceramic material. The ceramic photosensitive materials with the same solid phasecontent and different states are prepared so as to meet different requirements of various ceramic 3D printing.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a photosensitive ceramic material with high solid content of alumina and a preparation method thereof. Background technique [0002] High-performance ceramics are indispensable key materials for the development and application of modern high-end technology due to their excellent properties such as high hardness, high compressive strength, good wear resistance, high temperature resistance and acid and alkali corrosion resistance, and have been widely used in aerospace , biomedicine, machinery, electronics, energy, chemical industry and other industrial technology fields. However, with the rapid development of industrial technology and the continuous expansion of material application fields, traditional ceramic manufacturing technology cannot meet the needs of rapid manufacturing of high-end products. The 3D printing process is simple, the processing cost is low, a...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/626B33Y70/10B33Y10/00
CPCC04B35/10C04B35/62635B33Y70/10B33Y10/00
Inventor 谭鸿迪王莉刘正中施森王科王宁卢秉恒
Owner XI AN JIAOTONG UNIV
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