Alumina ceramic slip suitable for 3D printing, preparation method and application thereof

A kind of alumina ceramics, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of large amount of plasticizer, low strength of ceramic parts, high sintering temperature, etc., and achieve the effect of improving plasticity and fluidity

Active Publication Date: 2018-09-04
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an alumina ceramic slurry suitable for 3D printing, a preparation method and its application, which can solve the problem of the large amount of plasticizer required for the ceramic slurry used in 3D printing in the prior art, polluting the environment, and the prepared ceramic parts The technical problems of low strength and high sintering temperature

Method used

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  • Alumina ceramic slip suitable for 3D printing, preparation method and application thereof
  • Alumina ceramic slip suitable for 3D printing, preparation method and application thereof
  • Alumina ceramic slip suitable for 3D printing, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] First, according to the mass ratio of 0.3% glycerin, 0.1% polyvinyl alcohol 2000, and 76.8% ceramic powder, they were added to the acidic aluminum sol with a mass fraction of 20%, a pH of 3, and a concentration of 20%. The ceramic powder The body contains 5% of 20-80nm silicon dioxide and 95% of 0.5-2μm alumina; then add aluminum dihydrogen phosphate with a mass fraction of 2.8%, a pH of 2.5, and a concentration of 12% for 20 minutes to induce localized The sol was polymerized to improve the uniformity of the slurry; finally, it was aged for 48 hours, and the properties of the alumina slurry and its products obtained in this example are shown in Table 1.

Embodiment 2

[0026] First, according to the mass ratio of 0.2% glycerin, 0.3% polyethylene glycol 400, and 75% ceramic powder, they are added to the acidic aluminum sol with a mass fraction of 21%, a pH of 2.8, and a concentration of 25%. The powder contains 10% of 20-80nm silica and 90% of 0.5-2μm alumina; then add aluminum dihydrogen phosphate with a mass fraction of 3.5%, a pH of 2, and a concentration of 15% for 30 minutes to initiate local sol Polymerize and improve the uniformity of the slurry; finally, stale for 36 hours, the properties of the alumina slurry and its products obtained in this example are shown in Table 1.

Embodiment 3

[0028] First, according to the mass ratio of 0.2% glycerin, 0.2% carboxymethyl cellulose 1750, and 75.9% ceramic powder, they were added to the acidic aluminum sol with a mass fraction of 20%, a pH of 4, and a concentration of 15%. The ceramic powder contains 25% of 20-80nm silica and 75% of 0.5-1μm alumina; then add aluminum dihydrogen phosphate with a mass fraction of 3.7%, a pH of 2.2 and a concentration of 15% for 10 minutes to initiate local sol Polymerize and improve the uniformity of the slurry; finally, stale for 48 hours, the properties of the alumina slurry and its products obtained in this example are shown in Table 1.

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Abstract

The invention provides an alumina ceramic slip suitable for 3D printing, a preparation method and an application thereof. The alumina ceramic slip comprises the following raw materials by mass percentage: 70-80% of ceramic powder, 15-25% of aluminium sol, 2-5% of aluminium dihydrogen phosphate, and 0.3-0.5% of a dispersant, wherein the ceramic powder contains alumina. By using the technical scheme, the technical problems of large amount of required plasticizer used for the ceramic slip, environment pollution, low intensity of prepared ceramic part, and high required sintering temperature in the prior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional ceramics, and in particular relates to a functional ceramic slurry suitable for 3D printing, a preparation method and application thereof, in particular to an alumina ceramic slurry suitable for 3D printing, a preparation method and application thereof. Background technique [0002] Alumina ceramics have high mechanical strength, high resistivity, good electrical insulation, high melting point, good corrosion resistance, excellent chemical stability and other properties, and are widely used in machinery, electronic power, chemical industry, medicine, construction and other high-tech fields . The preparation methods mainly include: extrusion molding, dry pressing molding, injection molding, isostatic pressing molding, tape casting molding, grouting molding, gel injection molding and the like. When preparing components by these processes, it is necessary to prepare a mold with a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/63C04B35/626B33Y70/00B33Y80/00B33Y10/00
CPCB33Y10/00B33Y70/00B33Y80/00C04B35/10C04B35/62615C04B35/6303C04B35/6309C04B2235/3218C04B2235/3418C04B2235/447
Inventor 董衡孙志强肖振兴李淑琴吕毅赵英民裴雨辰
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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