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A kind of preparation method of hollow tube micro-lattice structure ceramic material

A technology of ceramic materials and micro-lattice arrays, which is applied in the direction of ceramic products, 3D object support structures, liquid material additive processing, etc., can solve the problems of complex process routes, limited structural designability, high cost, etc., and achieve low cost, The effect of avoiding adverse effects and simple method

Active Publication Date: 2021-03-26
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using the template method to prepare micro-array ceramic materials often requires a combination of thin film deposition technology, the process route is complicated, and the cost is high
At the same time, the wall thickness of the hollow tube of the lattice material is often limited to a small size (≤ 10 μm), and the inner diameter of the hollow tube is limited to the corresponding template diameter, which greatly limits the designability of the structure

Method used

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  • A kind of preparation method of hollow tube micro-lattice structure ceramic material
  • A kind of preparation method of hollow tube micro-lattice structure ceramic material
  • A kind of preparation method of hollow tube micro-lattice structure ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Using polycarbosilane / polypropylene powder as slurry and air as crosslinking gas, a three-dimensional hollow tube micro-array ceramic structure was prepared.

[0052] Put 8g of polycarbosilane, 0.4g of polypropylene, and 100ml of xylene into a beaker, and stir magnetically in an oil bath at 120°C for 6h. Then the clear and transparent solution was transferred to a vacuum drying oven, the temperature was set at 120°C, the pressure was -0.1MPa, and vacuum-dried for 24 hours to obtain uniformly blended polycarbosilane / polypropylene particles, the powder was ground and sieved to obtain straight Write with slurry. The screen mesh is 100 mesh.

[0053] Take 4g of polycarbosilane / polypropylene powder and put it into a stainless steel syringe, put a 200μm aperture needle on the top of the syringe, install a heating jacket on the outside of the syringe, assemble the piston and air guide tube, and inject 99.999% high-purity Nitrogen, the pressure is set to 50psi, keep 10min, re...

Embodiment 2

[0061] Using polycarbosilane / polypropylene powder as slurry and air as crosslinking gas, a three-dimensional hollow tube micro-array ceramic structure was prepared.

[0062] Put 8g of polycarbosilane, 0.24g of polypropylene, and 100ml of xylene into a beaker, and stir magnetically in an oil bath at 120°C for 6h. Then the clear and transparent solution was transferred to a vacuum drying oven, the temperature was set at 120°C, the pressure was -0.1MPa, and vacuum-dried for 24 hours to obtain uniformly blended polycarbosilane / polypropylene particles, the powder was ground and sieved to obtain straight Write with slurry. The screen mesh is 100 mesh.

[0063] Take 4g of polycarbosilane / polypropylene powder and put it into a stainless steel syringe, put a 150μm aperture needle on the top of the syringe, install a heating jacket on the outside of the syringe, assemble the piston and air guide tube, and inject 99.999% high-purity Nitrogen, the pressure is set to 50psi, keep 10min, r...

Embodiment 3

[0070] Using polycarbosilane / polydimethylsiloxane powder as slurry and air as crosslinking gas, a three-dimensional hollow tube micro-lattice ceramic structure was prepared.

[0071] Put 8g of polycarbosilane, 0.08g of polydimethylsiloxane, and 100ml of xylene into a beaker, and stir magnetically in an oil bath at 120°C for 6h. Then transfer the clear and transparent solution to a vacuum drying oven, set the temperature at 120 ° C, and the pressure at -0.1 MPa, and dry it in vacuum for 24 hours to obtain uniformly blended polycarbosilane / polydimethylsiloxane particles, and grind the powder And sieved to obtain the slurry for direct writing. The sieve is 100 mesh.

[0072] Take 4g of polycarbosilane / polydimethylsiloxane powder and put it into a stainless steel syringe, put a 200μm aperture needle on the top of the syringe, install a heating jacket on the outside of the syringe, assemble the piston and air tube, and pass it into the syringe 99.999% high-purity nitrogen, set th...

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Abstract

The invention provides a preparation method of a ceramic material with a hollow tube micro-lattice structure. The method comprises the following steps: 1, preparing raw materials; enabling the modified ceramic precursor in the molten state to pass through a direct writing forming device; preparing a ceramic material with a three-dimensional lattice structure, printing in a protective atmosphere toobtain a rough blank with a three-dimensional lattice structure, carrying out incomplete cross-linking reaction on the rough blank with the three-dimensional lattice structure in a cross-linking atmosphere to obtain an incomplete cross-linked blank; and removing uncross-linked parts in the blank to obtain a hollow tube micro-lattice precursor bracket, and carrying out pyrolysis to obtain the hollow tube micro-lattice structure ceramic material. The ceramic material with a unique structure is obtained by combining an additive manufacturing technology with subsequent heat treatment, so that thedefects of high manufacturing cost and complex process of the conventional hollow tube micro-lattice material are overcome, and the thickness of the tube wall is regulated and controlled between 1 micron and 100 microns. The low density of the material is ensured, the high strength, high hardness, excellent chemical stability and thermal stability of the ceramic are maintained, and the ceramic sample piece with various structures and complex shapes is obtained.

Description

technical field [0001] The invention belongs to the technical field of lightweight porous functional materials, and in particular relates to a preparation method of a hollow tube micro-lattice structure ceramic material. Background technique [0002] 3D printing technology is to digitally slice the three-dimensional model into two-dimensional cross-sections, and add and manufacture parts point by point, line, and surface, so that structures that are difficult or impossible to process by traditional techniques can be realized. Among them, direct writing molding technology, as a cheap 3D printing technology, was first proposed by Joseph Cesarano III of Sandia National Laboratory in the United States. This method can achieve a large aspect ratio and size control range, and enables the realization of 3D structures with unsupported features. The ink raw material composition used in its printing has a high degree of freedom in design, and can realize the three-dimensional shaping...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/571C04B35/622C04B38/00B29C64/106B29C64/379B29C35/02B33Y10/00B33Y40/20B33Y70/00B33Y80/00
CPCB29C35/02B33Y10/00B33Y70/00B33Y80/00B29C64/106B29C64/379B33Y40/20C04B35/571C04B35/622C04B38/0022C04B2235/6562C04B2235/6567C04B2235/658C04B2235/94C04B2235/95
Inventor 张斗赵连仲王小峰熊慧文
Owner CENT SOUTH UNIV