3D direct writing zirconium oxide colloid ink

A technology of zirconia colloid and zirconia particles, which is applied in the field of 3D printing material design, can solve the problems of low molding strength, low molding precision, and not suitable for small and fine parts, and achieve the effect of maintaining the molding shape, good elasticity and strength

Active Publication Date: 2018-08-28
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 zirconium oxide colloid ink
  • 3D direct writing zirconium oxide colloid ink
  • 3D direct writing zirconium oxide colloid ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Zirconia particles (preferably particle size D 50 =0.8um), deionized water, sulfuric acid, sodium hydroxide, cellulose, polyvinyl acid mixed, zirconia solid phase content is 45%, cellulose content is 0.002g / ml, polyethylene carboxylic acid is 0.6 of the dry powder content %, the dosage of sulfuric acid is 0.05%, and the dosage of sodium hydroxide is 0.05%. After mixing the above materials in proportion, place them on a ball mill and mill them at a speed of 90rmp for 12h to obtain zirconia ceramic ink, which 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 10pa is as high as 10 4 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 writing device, and start The thre...

Embodiment 2

[0048] Mix 1μm zirconia particles, deionized water, acid agent, alkali agent, hydantoin epoxy resin, polyacrylic acid, the solid phase content of zirconia is 40vol%, hydantoin epoxy resin with 15wt% content, polyacrylic acid as dry powder content of 0.8%, the amount of sulfuric acid is 0.1% of the ink mass, the alkali agent is sodium hydroxide, and the amount is 0.05% of the ink mass. Mix the above materials in proportion and put them on a ball mill for 12-24 hours at a speed of 100-140rmp , take it off, and ultrasonically vibrate for 1-12 hours to get 3D direct writing zirconia ceramic ink. its in 10s -1 The viscosity at the shear rate is 4Pa s, and has very good viscoelasticity, and its elastic modulus at 10pa is as high as 10 3 Pa, has good shape retention, can smoothly pass through the needle nozzle blockage and maintain a three-dimensional shape.

[0049] The 3D direct writing zirconia ceramic ink is loaded into the spray barrel of the 3D direct writing device, the nozz...

Embodiment 3

[0051] Mix 0.5μm zirconia particles, deionized water, pectin, acid agent, alkali agent, polycarboxylate sodium salt, zirconia solid phase content range is 55vol%, pectin content is 0.1g / ml, sodium polycarboxylate The salt is 0.8% of the dry powder content, the acid agent is sulfuric acid, and the dosage is 0.05%, and the alkali agent is sodium hydroxide, and the dosage is 0.05%. After the above materials are mixed in proportion, they are placed on a ball mill and ball milled at a speed of 100-140rmp for 12- After 24 hours, take it off, and after 1-12 hours of ultrasonic vibration, you can get 3D direct writing zirconia ceramic ink. its in 10s -1 The viscosity at the shear rate is 10Pa·s, and it has very good viscoelasticity, and its elastic modulus at 10Pa is as high as 10 5 Pa, has good shape retention, can smoothly pass through the needle nozzle blockage and maintain a three-dimensional shape.

[0052] The 3D direct writing zirconia ceramic ink is loaded into the spray bar...

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Abstract

The invention relates to 3D direct writing zirconium oxide colloid ink, which comprises the following raw materials: zirconium oxide particles, a solvent, a binder, an acid agent, an alkali agent anda dispersant, wherein the particle size of the zirconium oxide particles is 0.05-2 [mu]m, the solid content of the zirconium oxide particles in the ink is 40-56 vol%, the dispersant is one or a variety of materials selected from polyacrylic acid, polyvinyl acid, ammonium polyacrylate, polyethyleneimine, polyacrylate, polyvinyl acid salt and polycarboxylate, the dispersant accounts for 0.1-4 wt% ofthe mass of the zirconium oxide particle dry powder, the amount of the acid does not exceed 0.1% of the mass of the ink, the amount of the alkali does not exceed 0.1% of the mass of the ink, and a molar ratio of the hydrogen ion to the hydroxide ion in the acid agent and the alkali agent is (0.01-4):1. According to the present invention, with the application of the 3D direct writing zirconium oxide colloid ink to print at the room temperature, the high solid content can be provided while the 3D direct writing zirconium oxide colloid ink can be outflow from the fine spraying nozzle and the clogging cannot occur, the 3D direct writing zirconium oxide colloid ink can be rapidly cured into the fine wire with a certain strength so as to be used for various modeling, and the 3D direct writing zirconium oxide colloid ink has good rheological property.

Description

technical field [0001] The invention relates to a zirconia colloidal ink for 3D direct writing, belonging to the technical field of 3D printing material design. 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 l...

Claims

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Application Information

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Patent Type & Authority Applications(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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