Three-dimensional printing molding preparation method for porous ceramic for filtration

A technology of porous ceramics and three-dimensional printing, which is applied to ceramic forming machines, ceramic products, filtration and separation, etc., can solve the problems of high production cost of consumables and high structural complexity of printing equipment print heads, and achieve low manufacturing cost, simple structure, and easy preparation The effect of low technical requirements

Inactive Publication Date: 2017-08-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ceramic FDM technology requires a special process to manufacture ceramic filaments with high performance requirements. The production cost of the consumables used is high, and the printing head needs to be equipped with a heating device, which leads to high complexity of the printing equipment, especially the structure of the printing head.

Method used

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  • Three-dimensional printing molding preparation method for porous ceramic for filtration
  • Three-dimensional printing molding preparation method for porous ceramic for filtration
  • Three-dimensional printing molding preparation method for porous ceramic for filtration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of corundum (α-Al 2 o 3 ) three-dimensional printing preparation method of porous ceramics, the process is as follows Figure 4 As shown, the specific steps are as follows:

[0041] (1) Preparation of ceramic materials for three-dimensional printer printing, the steps are as follows:

[0042] 1) Take α-Al with an average particle size of 0.5-100 μm 2 o 3 300g of powder, 5-25g of magnesium oxide, titanium dioxide and silicon dioxide mixture (sintering aid) with an average particle size of 0.5-50μm, 7.5-30g of starch (pore-forming agent) with an average particle size of 0.5-100μm; these solid powders Add them together to the mixer for mixing, so that the different powders can be mixed evenly.

[0043] 2) Get 6-18g of 10wt% PVA solution (binder), mix it with 50-100g of deionized water, and gradually add the mixed solution into a mixer, and stir it evenly with the solid powder; Mix 3-9g of butyl ester (plasticizer) and 3-9g of polypropylene glycol with a molecu...

Embodiment 2

[0052] A three-dimensional printing and molding preparation method of quartz porous ceramics for filtration, the process is as follows Figure 4 As shown, the specific steps are as follows:

[0053] (1) Preparation of ceramic materials for three-dimensional printer printing, the steps are as follows:

[0054] 1) Take 300g of quartz powder with an average particle size of 5-15μm, 5-25g of anorthite-clay mixture with an average particle size of 1-5μm, and polymethyl methacrylate (pore-forming agent) with an average particle size of 5-15μm 7.5 -30g; and these solid powders are added to the mixer for mixing, so that the different powders are evenly mixed.

[0055] 2) Mix 6-24g of 3.5wt% carboxymethyl cellulose solution (binder) with 50-100g of deionized water, and gradually add the solution into a mixer, and stir evenly with the solid powder; Dibutyl diformate (plasticizer) 3-9g and polypropylene glycol with a molecular weight of 400 (lubricant) 3-9g (lubricant) and absolute eth...

Embodiment 3

[0061] A preparation method for three-dimensional printing and molding of silicon carbide porous ceramics for filtration, the process of which is as follows Figure 4 As shown, the specific steps are as follows:

[0062] (1) Preparation of ceramic materials for three-dimensional printer printing, the steps are as follows:

[0063] 1) Take 300g of silicon carbide powder with an average particle size of 100-300μm, 25-50g of albite-clay mixture with an average particle size of 10-50μm, and 7.5-30g of sucrose powder (pore-forming agent) with an average particle size of 30-100μm ; and these solid powders are added together into the mixer for mixing, so that the different powders are evenly mixed.

[0064]2) Take 8-24g of 3.5wt% polyacrylamide solution (binder) and mix with 50-80g of deionized water, and gradually add the mixed solution into the mixer, and mix it evenly with the solid powder; Triol (plasticizer) 4-10g and polyethylene glycol 4-10g (lubricant) with a molecular weig...

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Abstract

The invention discloses a three-dimensional printing molding preparation method for a porous ceramic for filtration. The method comprises the following steps: S1 preparing a ceramic material for printing in a three-dimensional printer; S2 printing a porous ceramic green body through the three-dimensional printer by using the prepared printing ceramic material; and S3; conducting drying, rubber discharging and sintering on the printed porous ceramic green body to obtain a porous ceramic with a specific shape structure. The three-dimensional printing molding preparation method has the beneficial effects that ceramic particles are loose in connection, the density of the ceramic green body is low, the shrinkage rate after sintering is large, and the defects such as deformation and cracking are easy to occur, and the mechanical properties of the prepared products are lower; and a generated loose porous structure has larger pore size in pores, and the pore size and porosity are difficult to control through a molding process parameter. The ceramic material for printing according to the invention fully mixes solid powder with liquid additive, the ceramic particles are connected closely and the components are uniform, and the printed ceramic green body has high precision and good mechanical performance.

Description

technical field [0001] The invention relates to the technical field of three-dimensional printing rapid prototyping, in particular to a three-dimensional printing and molding preparation method of porous ceramics for filtration. Background technique [0002] The molding methods used to prepare porous ceramics are similar to those of ordinary ceramics, mainly including extrusion molding, compression molding, grouting molding, and tape casting. These traditional ceramic molding methods are mostly used to manufacture ceramic products with simple structures, but for the manufacture of ceramic parts with special structures and complex shapes, corresponding molds need to be designed, resulting in long production cycles, high costs, and even difficulty in preparing complex structures. Therefore, it cannot meet the manufacturing requirements of different structural ceramic parts in various industrial fields. As a kind of additive manufacturing technology, 3D printing technology has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/10C04B35/622C04B35/634C04B35/626C04B35/632C04B35/14C04B35/636C04B35/565B28B1/00B33Y10/00B33Y70/00B01D39/20B01D46/54
CPCB01D39/2075B01D46/0001B01D46/543B01D2239/12B01D2239/1258B01D2273/20B28B1/001B33Y10/00B33Y70/00C04B35/10C04B35/14C04B35/565C04B35/622C04B35/62635C04B35/6264C04B35/632C04B35/63416C04B35/63444C04B35/6365C04B38/0645C04B38/067C04B38/068C04B2235/3206C04B2235/3232C04B2235/3418C04B2235/3472C04B2235/3481C04B2235/349C04B38/0074C04B38/0054
Inventor 黄学辉杨银波牛鹏举商晓辉李正晔窦世静
Owner WUHAN UNIV OF TECH
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