Ceramic slurry for photo-curing 3D printing

A ceramic slurry, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of low slurry, increase the difficulty of low-viscosity photocurable slurry, and difficult to obtain viscosity, and achieve high density and excellent self-leveling. excellent anti-settling properties

Active Publication Date: 2018-05-29
SHENZHEN SUNSHINE LASER & ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a large amount of ceramic powder to a small amount of photocurable resin can satisfy the solid content>75%, but it is difficult to obtain a slurry with a very low viscosity (≤3Pa·s), because the viscosity of general photocurable resin> 10mPa s, especially in order to improve the curing and crosslinking performance of the slurry, after adding a photocurable resin with high functional groups (functional group ≥ 3), the viscosity of the resin will further increase, which increases the difficulty of preparing low viscosity photocurable slurry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: preparation a-Al 2 o 3 ceramic slurry

[0039] Add 6.8g of BYK111 dispersant to 150g of absolute ethanol, stir well to form a solution; then measure 400g of submicron α-alumina, add it to the above solution, mill it in a ball mill for 4 hours, put the slurry on a tray, and place it in an oven Dry at 50°C for 24 hours to form a dry powder block, break up the block, and pass through a 60-mesh sieve to make alumina powder for later use.

[0040]Weigh 30.375g (2) propoxylated neopentyl glycol diacrylate, 3.391g (4) ethoxylated bisphenol A diacrylate, 3.784g tributyl citrate, 0.298g dispersant BYK111, 0.192g (2, Add 4,6-trimethylbenzoyl)diphenylphosphine oxide into a ball mill tank and mix evenly for 1 hour; add 75g of the previously prepared alumina powder, and ball mill and mix for 1 hour; then add 75g of the previously prepared alumina powder and continue After ball milling for 4 hours, the material was discharged to prepare a photocurable slurry with a s...

Embodiment 2

[0042] Embodiment 2: prepare the ceramic slurry of tetragonal zirconia

[0043] Weigh 7.195g (2) propoxylated neopentyl glycol diacrylate, 0.809g (4) ethoxylated bisphenol A diacrylate, 2.018g tributyl citrate, 0.810g dispersant BYK111, 0.04g (2, Add 4,6-trimethylbenzoyl)diphenylphosphine oxide into the beaker and mix it uniformly by ultrasonication for 5 minutes; then add 20.1g of 3mol% yttrium-stabilized tetragonal zirconia powder and disperse by ultrasonication for 10 minutes; then add 19.95g of 3mol% % Yttrium-stabilized tetragonal zirconia powder was sonicated for 1 hour to prepare a photocurable slurry with a solid content of 78.6%.

[0044] SNB-2 rotary viscometer was used to test the viscosity of the slurry. The viscosity of the slurry was measured at 0.46 Pa·s at a test temperature of 23.3°C and a rotation speed of 60 rpm using a 4# rotor. The slurry settlement test shows that the slurry has excellent anti-settling performance, and there is no delamination within at ...

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PUM

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Abstract

The invention provides ceramic slurry for photo-curing 3D printing. The slurry is prepared from the following components: ceramic powder, a dispersant, an acrylate monomer combination, an organic aidand a photoinitiator, wherein the acrylate monomer combination comprises at least two acrylate monomers, and the weight ratio of the acrylate monomer combination to the ceramic powder is 0.14-0.175; the weight of the dispersing agent is 0.05%-5% of the weight of the ceramic powder; the weight ratio of the organic aid to the acrylate monomer combination is 0.1-0.5; the weight ratio of the photoinitiator to the acrylate monomer is 0.002-0.01. The ceramic slurry has the advantages of high solid content, extremely low viscosity, excellent sedimentation resistance and the like.

Description

technical field [0001] The invention relates to the field of photocuring 3D printing, in particular to a ceramic slurry for photocuring 3D printing. Background technique [0002] Ceramic slurry with photocuring properties has been widely used in coatings, inks and other industries, but in these industries, the solid content of ceramic powder is generally low, and the weight content is less than 50% (weight ratio) of the total weight of the slurry; and The ceramic light-cured slurry for industrial ceramics requires that the light-cured green body has a higher density in order to obtain excellent mechanical properties, and then the ceramic body is further densified after subsequent degreasing and sintering. Therefore, this requires that the solid content of the photocurable ceramic slurry be higher than 75% (weight ratio), and the photocurable formula of coatings and inks cannot be copied for photocurable 3D printing of industrial ceramics. [0003] For the industrial alumina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/634C04B35/632C04B35/10C04B35/48B33Y70/00
CPCB33Y70/00C04B35/10C04B35/48C04B35/632C04B35/63424C04B2235/6026
Inventor 陆青肖华军肖坦蔡志祥
Owner SHENZHEN SUNSHINE LASER & ELECTRONICS TECH CO LTD
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