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Ceramic slurry for photocuring and preparation method thereof

A ceramic slurry, light curing technology, applied in the field of additive manufacturing, can solve the problems of long preparation cycle, complicated technical solution steps, low solid phase content, etc.

Inactive Publication Date: 2019-08-16
NAT INST CORP OF ADDITIVE MFG XIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al in this composition 2 o 3 The solid phase content of the slurry is 48-52vol%. The solid phase content is relatively low, which is prone to problems such as cracking and deformation in the subsequent degreasing and sintering process; the preparation process includes ball milling, mixing, ball milling and stirring, and the ball milling process is relatively complicated. The steps of the technical scheme of the method are cumbersome, and the preparation cycle is long, which is not conducive to mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method comprises the following steps:

[0037] Step 1, weighing the ceramic powder, dispersant, monomer and photoinitiator according to the proportion; the content of the dispersant is 1.0wt%-2.5wt% of the mass of the ceramic powder, and the content of the monomer is 56%-60% of the volume of the ceramic powder . Concrete ceramic powder, dispersant, monomer and photoinitiator are as above;

[0038] Step 2, mix the ceramic powder weighed in step 1 with the dispersant, and carry out ball milling treatment through a ball mill, the ball size is φ=5-10mm, the amount added is 1.2-1.8 times the mass of the ceramic powder, and the speed of the ball mill is 350r / min, the ball milling time is 6-8h, and the mixture F is prepared;

[0039] Step 3, after sieving the mixture obtained in step 2 through a 100-mesh sieve, place it in an oven, and dry it at 60° C. for 12 hours to obtain a solid mixture G;

[0040] Step 4, stirring and dissolving the photoinitiator in t...

Embodiment 1

[0044] Step 1, weigh spherical Al with d50=2.7um 2 o 3 Powder 100g (v=25.64mL, ρ=3.9g / cm 3 ), polyacrylamine 1.125g, stearic acid 0.375g, monomer hexahydrophthalic acid diglycidyl ether 12.85g (11.08mL), 1,6 hexanediol diacrylate (HDDA) 6.10g (6.04mL ), 3.57 g (3.03 mL) of dipentaerythritol hexaacrylate (DPHA), 0.07 g of benzoin dimethyl ether, and 0.129 g of diaryliodonium salt.

[0045] Step 2, the solid Al 2 o 3 The powder was mixed with polyacrylamine and stearic acid by ball milling, wherein the size of the balls was 5-10 mm, the addition amount was 150 g, the parameters of the ball mill were set at 350 r / min, and the ball milled for 8 hours to obtain the mixture F;

[0046] In step 3, the mixture F obtained in step 2 was sieved through a 100-mesh sieve, then placed in an oven, and dried at 60° C. for 12 hours to obtain a solid mixture G.

[0047] In step 4, the photoinitiator was manually stirred and dissolved in the monomer to obtain a mixture H. Then gradually ad...

Embodiment 2

[0049] Step 1, weigh spherical SiO with d50=2.7um 2 Powder 100g (v=45.45mL, ρ=2.2g / cm 3 ), sodium polyacrylate 0.75g, oleic acid 0.25g, monomer hexahydrophthalic acid diglycidyl ether 21.0g (18.10mL), 1,6 hexanediol diacrylate (HDDA) 11.63g (11.51mL) , 3.88 g (3.29 mL) of dipentaerythritol hexaacrylate (DPHA), 0.116 g of 2.4.6-trimethylbenzoyldiphenylphosphine oxide, and 0.158 g of diarylsulfonium salt.

[0050] Step 2, the solid SiO 2 The powder was mixed with polyacrylamide and stearic acid by ball milling, wherein the size of the balls was 5-10 mm, the addition amount was 120 g, the parameters of the ball mill were set at 350 r / min, and the ball milling was done for 6 hours to obtain the mixture F;

[0051] In step 3, the mixture F obtained in step 2 was sieved through a 100-mesh sieve, then placed in an oven, and dried at 60° C. for 12 hours to obtain a solid mixture G.

[0052] In step 4, the photoinitiator was manually stirred and dissolved in the monomer to obtain a ...

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PUM

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Abstract

The invention discloses ceramic slurry for photocuring and a preparation method thereof. By controlling the contents of the main ceramic slurry, a dispersing agent, a monomer and a photoinitiator, thehigh-solid-content ceramic slurry for photocuring is prepared; wherein the dispersing agent can enable the solid to be better dispersed in the liquid, so that the dispersion of the main ceramic slurry in the monomer is more uniform; the monomer is selected from a mixture of free radical type photosensitive resin and cationic type photosensitive resin with different functions and reaction efficiencies; wherein hexahydro-o-phthalic acid diglycidyl ether can make the finally prepared ceramic slurry for light curing not liable to deform, the 1,6-hexanediol diacrylate can make the viscosity of a monomer to be suitable for uniform dispersion of ceramic powder in the monomer and improves the solid phase content of the slurry; and dipentaerythritol hexaacrylate can improve the reaction efficiency; by selecting each substance in the monomer, the prepared ceramic slurry has high solid-phase content, high reaction efficiency and high printing precision.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of additive manufacturing, and in particular relates to a photocuring ceramic slurry and a preparation method thereof. [0003] 【Background technique】 [0004] Additive manufacturing technology has been developed for more than 30 years. Its molding technology includes fused deposition modeling technology, laser sintering / cladding technology and light curing molding technology. It has a series of advantages such as fast molding speed, high precision, and rapid completion of complex parts manufacturing. . Photocuring molding refers to the use of liquid photosensitive resin as the raw material, and the ultraviolet light source scans the cured resin layer by layer according to a certain scanning path until the printing is completed. It has high printing precision and mature technology, and is currently a well-developed and promising additive manufacturing technology. Alumina ceramics have excellent ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/14C04B35/48C04B35/195C04B35/622B33Y70/00
CPCC04B35/10C04B35/14C04B35/48C04B35/195C04B35/622B33Y70/00
Inventor 董文彩鲍崇高宋索成赵纪元卢秉恒
Owner NAT INST CORP OF ADDITIVE MFG XIAN
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