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A kind of ceramic ink and its preparation method and application

A technology of ceramic ink and ceramic powder, which is applied in ceramic molding machines, manufacturing tools, pharmaceutical formulations, etc., can solve the problems of low solid phase content, meet the requirements of strength and density, prevent agglomeration, and reduce the average particle size. Effect

Active Publication Date: 2018-02-23
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ding Xiang tried to use sodium alginate or polyacrylic acid 3000 as a dispersant to prepare a zirconia ceramic ink with a maximum solid content of 15vol.%. However, due to its low solid content, it is difficult to obtain high-density ceramics by sintering. products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method of this ceramic ink comprises the following steps:

[0036] (1) According to the mass ratio, mix 100 parts of ceramic powder, 11 to 50 parts of water and 11 to 50 parts of glycerin to form a mixed slurry, and then add 1.4 to 9 parts of dispersant to the mixed slurry and mix evenly; the particle size of the ceramic powder is less than 1000nm, and the dispersant is composed of ammonium polyacrylate and polyvinylpyrrolidone with a mass ratio of 1:5 to 5:1; wherein ammonium polyacrylate is an anionic dispersant, poly Vinylpyrrolidone is a non-ionic dispersant;

[0037] (2) Add 0.3-2 parts of water-soluble defoamer and 0-3.5 parts of binder to the mixed slurry, and use a speed ball mill of 100rpm-300rpm to disperse it evenly, because the dispersant itself also has bonding Therefore, no binder can be added; the ball milling time is related to the ball milling speed and the amount of material, preferably 8h~30h, and the ball-to-material ratio of ball mi...

Embodiment 1

[0047] (1) Weigh 242g of 3YSZ ceramic powder (yttrium-stabilized zirconia ceramic powder), 80g of deionized water, and 63g of glycerin, pour into a beaker, mix, and stir evenly; : 1 ammonium polyacrylate and polyvinylpyrrolidone composition);

[0048] (2) Add 1.21g polyvinyl alcohol as a binder and 2g n-octanol as a defoamer to the beaker, stir evenly to obtain a slurry; then pour the slurry into a ball mill jar, add zirconia ball mill beads, 250rpm planetary Ball milling for 24 hours;

[0049] (3) Add 20g ethanol as an organic solvent to the ceramic slurry, stir evenly, add 5g ammoniacal liquor (national medicine, NH 4 The mass fraction of OH is 26% ± 2%) to adjust the pH to 10;

[0050] (4) Filter the slurry through a 5 μm inkjet printer butterfly filter to obtain stable ceramic ink, pour the ceramic ink into a suspension bottle, and store it statically and sealed at room temperature.

[0051] This 3YSZ ceramic ink has a solid phase content (volume fraction of ceramic pow...

Embodiment 2

[0053] (1) Weigh respectively 200g of alumina ceramic powder, 60g of glycerin, and 60g of deionized water, pour into a beaker, mix, stir evenly, then add 7g of dispersant (ammonium polyacrylate and ammonium polyacrylate of 3:4 by mass ratio) composed of polyvinylpyrrolidone);

[0054] (2) Add 4g of polyvinyl alcohol as a binder in the beaker, 2g of n-octanol as a defoamer, stir evenly to obtain a slurry; then pour the slurry into a ball mill jar, add alumina ball mill beads, and 300rpm planetary ball mill 16h;

[0055] (3) Add 20 g of ethanol as an organic solvent to the ceramic slurry, stir evenly, add 4 g of dimethylamine solution (the mass fraction of dimethylamine is 40%) to adjust the pH to 10;

[0056] (4) Filter the slurry through a 10 μm inkjet printer butterfly filter to obtain stable ceramic ink, pour the ceramic ink into a suspension bottle, and store it statically and sealed at room temperature.

[0057] The solid phase content of this alumina ceramic ink (volume...

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Abstract

The invention discloses a ceramic ink, which comprises the following raw materials in percentage by mass: 57-57% of ceramic powder, 1-5% of a dispersant, 8-30% of glycerol, 8-35% of water and 5-20% of an organic solvent; and the pH value of the ceramic ink is 8-12, and the dispersant is composed of ammonium polyacrylate and polyvinylpyrrolidone in a mass ratio of 1:5 to 5:1. The invention also discloses a preparation method of the ceramic ink and the application of the ceramic ink in the ink-jet printing of false teeth. According to the invention, the dispersion and ink stability of the ceramic ink are improved by a binary dispersant, and then the solid phase content of the ceramic ink is increased to 20-40 vol. %, so that the ceramic ink can be used for directly printing ceramic products such as false teeth and the like through ink-jet printing, and the relative density of ceramic products is more than 98%.

Description

technical field [0001] The invention belongs to the field of three-dimensional printing rapid prototyping, and more specifically relates to a ceramic ink and its preparation method and application. Background technique [0002] Direct inkjet printing is a three-dimensional printing rapid prototyping method, with high material utilization rate, no mold required for molding, shortened manufacturing cycle, high manufacturing efficiency and low cost, especially the droplet size of direct inkjet printing is picoliter (10 -12 L) level, so the shape accuracy of the printed product is high, and no post-processing is required. The viscosity of inkjet printing ink is generally required to be less than 30cP, while for ceramic inkjet printing ink, it is necessary to ensure its low viscosity to meet the requirements of inkjet printing, and it also requires a high solid content to obtain a high sintered body density Therefore, the current direct inkjet printing of ceramic products such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C04B35/632C04B35/486C04B35/488C04B35/111C04B35/119B28B1/00A61K6/02
CPCA61K6/802A61K6/818B28B1/001C04B35/111C04B35/119C04B35/486C04B35/488C04B35/62625C04B35/632C04B2235/96
Inventor 肖建中徐坦田思宇刘璐刘文燕李向东王超王兵
Owner HUAZHONG UNIV OF SCI & TECH
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