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Preparation method of three-dimensional network ceramic framework

A technology of ceramic skeleton and three-dimensional network, which is applied in the field of preparation of three-dimensional network ceramic skeleton, can solve problems such as difficulty in mass production, influence of ceramic skeleton strength, and performance reduction of composite materials, and achieve process simplification, easy large-scale batch production, and low cost low effect

Pending Publication Date: 2021-01-15
张志国
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among the composite materials with ceramics as reinforcements, the three-dimensional network reinforcement has unique advantages and is one of the research hotspots in recent years. There are many preparation methods for the three-dimensional network ceramic skeleton, such as the sponge precursor suspension method, and finally through The organic components are removed by sintering to obtain a three-dimensional continuous network ceramic skeleton, but this ceramic skeleton is a hollow structure, and the precursor organic sponge in the center of the ceramic skeleton forms holes inside the ceramic skeleton after being burned, which affects the strength of the ceramic skeleton. And there are blind holes in the voids of the ceramic skeleton, which makes the composite process difficult and reduces the performance of the composite material
[0003] Modern 3D printing technology is developing rapidly, and it has been able to print metals, ceramics, building materials, plastics, food and other materials. The method used for ceramic printing is generally divided into laser sintering SLS and light curing, but it is generally used for printers with special performance ceramics. , the structure is relatively complicated, and the ceramic consumables are also very expensive, usually only used for special parts. In patent CN109049268A, CN 109591150A and patent CN 109678526A, a three-dimensional three-dimensional ceramic bone body 3D printing method is provided, but the equipment and The method is still very complicated, the production efficiency is low, and it is difficult to achieve mass production

Method used

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  • Preparation method of three-dimensional network ceramic framework
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  • Preparation method of three-dimensional network ceramic framework

Examples

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Effect test

example 1

[0017] Example 1, the manufacture of a cylindrical solid rod grid frame ceramic skeleton.

[0018] The topological unit is designed as an orthogonal cylindrical solid cross, such as figure 1 , the length of each side of the cross is 10 mm, the diameter of the cylinder is Φ4 mm, and the dimension from topology to outer contour is 100 mm × 80 mm × 60 mm. This mold is called the positive mold (ceramic firing shrinkage has been added). figure 2 , in the 100 mm × 80 mm × 60 mm three-dimensional space to remove the part of the positive mold, which is the negative mold.

[0019] Use 3D to print the negative model, and the additive is modified paraffin, which is quite simple for 3D printing.

[0020] Inject ZTA ceramic slurry into the hole of the printed negative mold, and there are additional materials of forming agent in the slurry to facilitate injection and solidification.

[0021] After the ceramic slurry is solidified, the whole body is slowly heated at 3-5°C / min, and heated ...

example 2

[0023] Example 2, the three-dimensional network SiC ceramic skeleton of regular triangular pyramid topology.

[0024] Design the triangular pyramid topological three-dimensional skeleton model, add ceramic firing shrinkage, the frame edge is composed of straight rod cylinders with a diameter of Φ4 mm, the center distance from the apex to the opposite side is 12 mm, and the topology extends to the space profile in the range of 200 mm × 100 mm × 30 mm , the schematic diagram of the local three-dimensional structure is shown in image 3 shown.

[0025] Remove the positive model designed in [0018] in the three-dimensional space of 200mm×100mm×30mm in the spatial outline, and obtain the negative model, and print the negative model in 3D, the same as in [0013].

[0026] Inject SiC ceramic slurry into the negative mold, the slurry contains additional materials, and is molded by gel method.

[0027] Thereafter, the required three-dimensional network ceramic skeleton was obtained wit...

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Abstract

The invention discloses a preparation method of a three-dimensional network ceramic framework. The ceramic framework can be used for manufacturing a composite material by using a reinforcement body. The preparation method comprises the following steps: for a required complex three-dimensional network ceramic framework, firstly establishing a three-dimensional structure model by using a computer, then converting the three-dimensional structure model into a negative model in a three-dimensional space range, printing a negative model made of modified paraffin or modified plastic additive by usinga 3D printing technology, filling holes of the negative model with ceramic powder and an additional forming material, then performing pressure forming in a steel mold, and then heating to enable paraffin to be dissolved or plastic to be softened and disappear to obtain a ceramic framework blank; or filling the holes of the negative model with ceramic slurry by using a gel method, and after the ceramic slurry is solidified, heating the whole body to enable paraffin to be dissolved or plastic to be softened and disappear to obtain the ceramic framework blank; and performing glue discharging andother treatment on the ceramic framework blank, and performing biscuit firing and high-temperature sintering to obtain the ceramic framework.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional network ceramic skeleton. Using the three-dimensional network ceramic skeleton as a reinforcing body, a metal-based composite material or a non-metallic polymer-based composite material can be produced. The composite material can be used for heat-resistant and wear-resistant materials. It can also be used in the field of impact armor. Background technique [0002] Among the composite materials with ceramics as reinforcements, the three-dimensional network reinforcement has unique advantages and is one of the research hotspots in recent years. There are many preparation methods for the three-dimensional network ceramic skeleton, such as the sponge precursor suspension method, and finally through The organic components are removed by sintering to obtain a three-dimensional continuous network ceramic skeleton, but this ceramic skeleton is a hollow structure, and the precursor organic spon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/00B33Y10/00
CPCB28B1/001B33Y10/00
Inventor 张志国高东利王海坡
Owner 张志国
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