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3d direct writing zirconia ceramic ink

A technology of zirconia ceramics and zirconia particles, which is applied in the field of 3D printing materials, can solve the problems of complicated follow-up processing, low forming precision, low forming strength, etc., and achieves free adjustment of porosity and stent width, good elastic performance and strength, Avoid cracking or deforming effects

Active Publication Date: 2021-06-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Typical examples of 3D printing manufacturing technology include photocuring molding, selective laser sintering molding, and layered solid molding, etc., but there are disadvantages such as low molding accuracy, complicated follow-up processing, and low molding strength, which are not suitable for the preparation of small fine parts.
The raw material preparation process of this method is simple, fast and convenient, but it needs to be frozen in the 3D printing process, and the cost is very high
In addition, Publication No. 104877463 discloses a zirconia ceramic ink for 3D inkjet printing and its preparation method; however, the ink is used for 3D inkjet printing after all, and the solid content requirement is not high, nor can it be used in 3D direct writing state. In this way, the ink can be effectively cured and formed. The ink obtained according to this scheme does not meet the requirements of 3D direct writing ink at all.

Method used

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  • 3d direct writing zirconia ceramic ink
  • 3d direct writing zirconia ceramic ink
  • 3d direct writing zirconia ceramic ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Zirconia particles (preferably particle size D 50 =0.8um), deionized water, cellulose, polyvinyl acid, and ammonium chloride are mixed to form a slurry; the solid phase content of zirconia is 44%, the cellulose content is 0.002g / ml, and polyvinyl acid is a dry powder of zirconia particles content of 0.6%, and the amount of ammonium chloride is 0.06% of the ink mass. After mixing the above materials in proportion, they are placed on a ball mill and milled at a speed of 90rmp for 12 hours to obtain zirconia ceramic ink. The zirconia ceramic ink has very good Shear thinning, which in 10s -1 The viscosity at the shear rate is 2Pa·s, and it has very good viscoelasticity, and its elastic modulus at 1pa is as high as 10 3 Pa, has good shape retention, can pass through the needle nozzle blockage smoothly and maintain a three-dimensional shape, then put the ink into the spray barrel of the 3D direct writing device, the nozzle diameter is 100um, set the program of the 3D direct ...

Embodiment 2

[0049] 1 μm zirconia particles, deionized water, zinc acetate, hydantoin epoxy resin, ammonium polyacrylate; in the slurry: zirconia solid phase content ranges from 56vol%, hydantoin epoxy resin with a content of 15wt%, ammonium polyacrylate The content of dry powder of zirconia particles is 0.8%, and the dosage of zinc acetate is 0.05% of the ink mass. Mix the above materials in proportion and put them on a ball mill at a speed of 100-140rmp for 12-24h, remove them, and ultrasonically oscillate for 1-12h Then get 3D direct writing zirconia ceramic ink. its in 10s -1 The viscosity at the shear rate is 3Pa·s, and it has very good viscoelasticity, and its elastic modulus at 10pa is as high as 10 3 Pa, has good shape retention, can pass through the nozzle plug smoothly and maintain a three-dimensional shape, (see Figure 5-6 )

[0050] The 3D direct writing zirconia ceramic ink is loaded into the spray barrel of the 3D direct writing device, the nozzle diameter is 2um, the pro...

Embodiment 3

[0052] Mix 0.5 μm zirconia particles, deionized water, gum arabic, sodium polycarboxylate, and sodium chloride evenly, the solid phase content of zirconia is 40vol%, the gum arabic content is 0.08g / ml, sodium polycarboxylate The salt is 1% of the dry powder content of zirconia particles, and the amount of sodium chloride is 0.1% of the ink mass. The above materials are mixed in proportion and placed on a ball mill at a speed of 100-140rmp for 12-24h, removed, and ultrasonically oscillated for 1 After -12h, the 3D direct writing zirconia ceramic ink is obtained. its in 10s -1 The viscosity at the shear rate is 2Pa·s, and has very good viscoelasticity, and its elastic modulus at 0.5pa is as high as 10 3 Pa, has good shape retention, can pass through the nozzle plug smoothly and maintain a three-dimensional shape, (see Figure 7-8 )

[0053] The 3D direct writing zirconia ceramic ink is loaded into the spray barrel of the 3D direct writing device, the nozzle diameter is 10um, ...

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Abstract

3D direct writing zirconia ceramic ink, including zirconia particles, solvents, binders, dispersants and salt substances; the particle size of zirconia particles is 0.1-2μm, and the solid phase content in the ink is 40-58vol%; dispersant It is one or more of polyacrylic acid, polyvinyl acid, ammonium polyacrylate, polyvinyl acid salt, polyacrylate, polycarboxylate, and polyacetimide, and the dispersant is 0.1-2% by mass of dry powder of zirconia particles; Salt substances are ammonium chloride, zinc acetate, sodium chloride, magnesium chloride, potassium chloride, barium chloride, ammonium bicarbonate, anhydrous calcium chloride, potassium carbonate, sodium bicarbonate, sodium carbonate, anhydrous sodium carbonate, anhydrous One or more of sodium acetate water, anhydrous calcium chloride, copper sulfate, basic copper carbonate, ammonium sulfate, ammonium bicarbonate, aluminum potassium sulfate, and sodium citrate, and the salt substance is 0.001-0.1% of the ink mass. The invention can be printed at room temperature, has relatively high solid content, can flow out from fine nozzles without clogging, can quickly solidify into filaments with certain strength, and has good rheological properties.

Description

technical field [0001] The invention relates to a zirconia ceramic ink for 3D direct writing, belonging to the technical field of 3D printing materials. Background technique [0002] Modern micro-processing technology has incomparable advantages over traditional processing methods at the micro-nano scale. Microprocessing technology includes soft etching technology, laser ablation technology, stereolithography technology, two-photon polymerization technology, electrostatic discharge technology and 3D direct writing technology, etc. Among them, 3D direct-writing technology (three dimensional direct-writing), also known as direct-writing assembly technology (Direct-writing Assembly), is a branch of 3D printing technology. Typical examples of 3D printing manufacturing technology include photocuring molding, selective laser sintering molding, and layered solid molding, etc., but there are disadvantages such as low molding accuracy, complicated follow-up processing, and low moldi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/30C09D11/38C04B35/48
CPCC04B35/48C09D11/30C09D11/38
Inventor 张斗廖晶晶陈何昊周科朝
Owner CENT SOUTH UNIV
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