Ceramic material for photocuring 3D printing and ceramic member, and preparation methods thereof

Abstract

The invention discloses a ceramic material for photocuring 3D printing and a ceramic member, and preparation methods thereof. The preparation method for the ceramic material comprises the following steps: S0, weighing a certain amount of ceramic powder with an average particle size of 1 to 10 [mu]m, organic monomers with a viscosity of 100 cps or below and a copolymer dispersant containing acidicgroups, and dividing the dispersant into two parts; S1, pouring ceramic powder and an organic solvent in a volume ratio of 1: 1 to 1: 2 into a ball milling tank, adding the first part of the dispersant and successively carrying out sufficient ball milling, filtering and drying so as to obtain pre-dispersed powder; S2, pouring the organic monomers into a container, carrying out mechanical stirring,adding a free radical type photoinitiator, a thickening agent and the second part of the dispersant and carrying out stirring for dissolving so as to obtain a mixed solution; and S3, adding the powder into the mixed solution in multiple times to prepare mixed slurry, carrying out uniform mixing under stirring, transferring the obtained mixture into the ball milling tank and carrying out thoroughball milling so as to prepare the ceramic material. The ceramic material prepared in the invention has good stability; and the prepared ceramic member is reduced in size and has high density and bending strength.

Description

【Technical field】 [0001] The invention relates to a ceramic material for photocuring 3D printing, a ceramic part and a preparation method thereof. 【Background technique】 [0002] With the rise of the 3D printing industry, the additive manufacturing industry has entered a new era of rapid development. Many complex and exquisite workpieces that cannot be realized by traditional techniques can be manufactured by 3D printing. The existing relatively mature 3D printing methods include fused deposition method (FDM), selective laser sintering (SLS), stereolithography (SLA) and digital light processing (DLP), etc., and the working principles of these methods are different. Each printable material has some corresponding requirements, so not all materials can be formed by 3D printing. Now there are many materials that can realize 3D printing, including various metal alloys and plastic nylon. [0003] As a very historical inorganic non-metallic material, ceramic materials have been s...

AI Technical Summary

Problems solved by technology

Currently available ceramic materials on the market, Al 2 o 3 Taking materials as an example, most of the prepared slurries have poor stability, and stratification will occur after one day of storage

Moreover, after degreasing and sintering the green objects formed by these ceramic materials to form finished ceramic parts, the dimensional accuracy is not easy to control, and the amount of deformation is very large (dimension shrinkage is more than 30%). Only through later machining can the specified Dimensional accuracy requirements, which lead to time-consuming and labor-intensive processing

In addition, the relative density of finished ceramic parts is generally below 90%, and the bending strength is about 300MPa, which cannot meet the performance requirements of some special ceramics.

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