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Ceramic slurry and preparation method and application thereof

A technology of ceramic slurry and ceramic powder, applied in the field of 3D printing, can solve the problems of difficult removal of slurry, difficult self-leveling of slurry, unfavorable cleaning, etc., and achieves the effect of high compliance rate, less bubbles and less hole blocking phenomenon.

Pending Publication Date: 2021-03-12
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material for ceramic 3D printing is usually resin-based ceramic slurry, which has high viscosity and poor fluidity
At the same time, high-viscosity ceramic slurry is not easy to remove air bubbles, and the slurry is difficult to self-level during printing
In addition, high-viscosity ceramic slurry is not conducive to cleaning, and the residual slurry in the internal pores of complex structural ceramic parts is difficult to remove, which is likely to cause serious hole blocking and make the product fail to meet the design requirements of the part.

Method used

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  • Ceramic slurry and preparation method and application thereof
  • Ceramic slurry and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides a preparation method of zirconia ceramic slurry, which preparation method comprises the following steps:

[0044] S1: Weigh 0.5 g of polymer hyperdispersant and add it into 100 ml of absolute ethanol, and magnetically stir until completely dissolved to obtain the first dispersant solution. Add 30 g of zirconia ceramic powder into the first dispersant solution, stir magnetically at 60° C. for 2 hours, dry and sieve to obtain modified zirconia ceramic powder.

[0045] S2: Take 30 g of modified zirconia ceramic powder, 0.1 g of phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide, 7 g of acryloyl morpholine and 3 g of polyethylene glycol diacrylate and mix them. The zirconia ceramic slurry was obtained by ball milling in a planetary ball mill at room temperature for 0.5 hour.

[0046] S3: Weigh 0.1g of polymer hyperdispersant and dissolve it in 10ml of absolute ethanol at 60°C, stir magnetically to form a second dispersant solution, and mill the seco...

Embodiment 2

[0053] This embodiment provides a preparation method of zirconia ceramic slurry, which preparation method comprises the following steps:

[0054] S1: Weigh 13.5g of polymer hyperdispersant and add it into 300ml of absolute ethanol, and magnetically stir until completely dissolved to obtain the first dispersant solution. Add 270 g of zirconia ceramic powder into the first dispersant solution, stir magnetically for 5 hours at 60° C., dry and sieve to obtain modified zirconia ceramic powder.

[0055] S2: Take 270g of modified zirconia ceramic powder, 0.55g of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, 40g of 1,6-hexanediol dimethacrylate and polyethylene 15 g of diol diacrylate was mixed, and ball milled in a planetary ball mill at room temperature for 2 hours to obtain a zirconia ceramic slurry.

[0056] S3: Weigh 2g of polymer hyperdispersant and dissolve it in 10ml of absolute ethanol (the volume is about 2% of the final volume of the slurry) at 60°C, stir magnetically...

Embodiment 3

[0062] This embodiment provides a preparation method of alumina ceramic slurry, the preparation method comprising the following steps:

[0063] S1: Weigh 1.8g of polymer hyperdispersant and add it into 200ml of absolute ethanol, and magnetically stir until completely dissolved to obtain the first dispersant solution. Add 60 g of alumina ceramic powder into the first dispersant solution, stir magnetically at 60° C. for 3 hours, dry and sieve to obtain modified alumina ceramic powder.

[0064] S2: Take 60g of modified alumina ceramic powder, 0.55g of phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, 5g of isobornyl acrylate and 5g of polyethylene glycol diacrylate and mix them. The alumina ceramic slurry was obtained by ball milling in a planetary ball mill at room temperature for 1 hour.

[0065] S3: Weigh 0.2g of polymer hyperdispersant and dissolve it in 10ml of absolute ethanol at 60°C, stir magnetically to form a second dispersant solution, and mill the second dispersant s...

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Abstract

The invention provides ceramic slurry and a preparation method and application thereof. The preparation method of the ceramic slurry comprises the following steps of S1, mixing ceramic powder and a first dispersing agent in a first solvent, and reacting to obtain modified ceramic powder, and S2, mixing the modified ceramic powder with auxiliary materials to obtain ceramic slurry. The modified ceramic powder or ceramic slurry is subjected to secondary modification through a second dispersing agent. The hydrophilic end of the first dispersing agent reacts with the surface group of the ceramic powder and is grafted to the surface of the ceramic powder, so that the surface property of the ceramic powder is changed, and the viscosity of the formed ceramic slurry is reduced. The inventor accidentally finds that even if the dispersing agent and the dispersing time are excessive, what cannot be ensured is that all the surfaces of the ceramic powder are coated with the dispersing agent. Therefore, the modified ceramic powder or the formed ceramic slurry is subjected to secondary modification, the surface of the modified ceramic powder or the formed ceramic slurry is further grafted with thesecond dispersing agent, the ceramic powder is fully coated, and the viscosity of the ceramic slurry is more effectively reduced.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to ceramic slurry and its preparation method and application. Background technique [0002] In recent years, ceramic 3D printing technology has been initially developed and has attracted the attention of more and more scientific and technological workers. Common ceramic 3D printing technologies include Selective Laser Sintering, Selective Laser Melting, Laminated Object Manufacturing, Inkjet Printing, Robocasting and Stereolithography, etc. The raw material for ceramic 3D printing is usually resin-based ceramic slurry, which has high viscosity and poor fluidity. At the same time, high-viscosity ceramic slurry is not easy to remove air bubbles, and the slurry is difficult to self-level during the printing process. In addition, high-viscosity ceramic slurry is not conducive to cleaning, and the residual slurry in the internal pores of complex structural ceramic parts is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/626C04B35/622B33Y70/10B33Y80/00C04B35/48C04B35/10C04B35/468
CPCC04B35/62635C04B35/622B33Y70/10B33Y80/00C04B35/48C04B35/10C04B35/468C04B2235/32C04B2235/3852C04B2235/3817
Inventor 白家鸣孙进兴
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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