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Preparation method of porous alumina ceramics based on Gyroid curved surface

A technology of alumina ceramics and curved surfaces, applied in ceramic products, applications, household appliances, etc., can solve the problems of difficult control of pore structure and pore size, difficulty in ensuring the mechanical properties of finished products, and unstable pore structure molding. The effect of more diverse applications, spatial arrangement, and better connectivity

Inactive Publication Date: 2019-03-26
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its pore-forming mechanism mainly includes mechanical extrusion, particle accumulation, pore-forming agent, foaming, porous template, and condensed structure pore formation. However, these traditional preparation methods cannot form complex and regular pore structures and have the disadvantages that the pore size is difficult to control. The forming of the structure is not stable enough, it is easy to produce defects such as cracks and collapses, and it is difficult to guarantee the mechanical properties of the finished product

Method used

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  • Preparation method of porous alumina ceramics based on Gyroid curved surface
  • Preparation method of porous alumina ceramics based on Gyroid curved surface
  • Preparation method of porous alumina ceramics based on Gyroid curved surface

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Embodiment 1

[0017] (1) Preparation of the PLA skeleton: use the fused deposition 3D printer to directly print the reverse three-dimensional structure of the Gyroid surface of the designed PLA material, with a layer thickness of 0.1mm, a cube with a side length of 4cm, a period parameter of 2, and a surface thickness 1mm.

[0018] (2) Preparation of ceramic slurry: Al 2 o 3 powder, CaO powder, MgO powder, SiO 2 Powder and TiO 2 The powder is weighed and mixed according to the ratio of 93.5:0.3:0.09:0.21:0.5. After ball milling for 4 hours, sieve to obtain ceramic powder with a particle size of ≤1 μm;

[0019] (3) Preparation of ceramic slurry: Pour the ceramic powder described in step (2) into deionized water, and the mass ratio of powder to deionized water is 1:1. Put it in a drum-type ball mill for mixing for 2 hours, the rotation speed is 100r / min, and finally add a dispersant of 1wt% gum arabic, stir, and obtain alumina ceramic slurry after aging for 24 hours;

[0020] (4) Prepara...

Embodiment 2

[0023] (1) Preparation of the PLA skeleton: Use the fused deposition 3D printer to directly print the reverse three-dimensional structure of the Gyroid surface of the designed PLA material, with a layer thickness of 0.1mm, a cube with a side length of 4cm, a period parameter of 3, and a surface thickness 1mm.

[0024] (2) Preparation of ceramic slurry: Al 2 o 3 powder, CaO powder, MgO powder, SiO 2 Powder and TiO 2 The powder is weighed and mixed according to the ratio of 93.5:0.3:0.09:0.21:0.5. After ball milling for 4 hours, sieve to obtain ceramic powder with a particle size of ≤1 μm;

[0025] (3) Preparation of ceramic slurry: Pour the ceramic powder described in step (2) into deionized water, and the mass ratio of powder to deionized water is 1:1. Put it in a drum-type ball mill for mixing for 2 hours, the rotation speed is 100r / min, and finally add a dispersant of 1wt% gum arabic, stir, and obtain alumina ceramic slurry after aging for 24 hours;

[0026] (4) Prepara...

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Abstract

The invention discloses a porous Al2O3 ceramic based on a Gyroid curved surface and a preparation method of the porous Al2O3 ceramic. The porous Al2O3 ceramic is formed based on a three-period minimalsurface Gyroid, and is excellent in mechanical property, smooth and continuous in pore structure and three-dimensional connective. The prepared porous Al2O3 ceramic based on the Gyroid curved surfacehas the characteristics of Al2O3 ceramics, such as high hardness, high-temperature insulating resistance and erosion resistance, can be combined with the functionality of the Gyroid curved surface structure, and has a wide application space in the industrial field. The preparation method mainly comprises the following steps: designing a Gyroid curved surface structure and performing 3D printing;preparing Al2O3 ceramic powder and slurry; and preparing the porous ceramic. By directly controlling the parametrization design of the Gyroid curved surface structure and accurately controlling the three-dimensional structure, pore size, porosity, pore shape distribution and the like, the prepared porous Al2O3 ceramic is suitable for industrial needs.

Description

technical field [0001] The present invention relates to a porous Al 2 o 3 The preparation method of ceramics, specifically related to a porous Al based on Gyroid surface 2 o 3 Ceramics and methods of making them. Background technique [0002] Porous Al 2 o 3 Ceramic is a new type of ceramic with a three-dimensional network through-hole structure, which exhibits many special properties such as permeability, high specific surface area, low thermal conductivity, energy absorption, etc., and can be used as a filter, porous electrode, sensor, sound-absorbing, shock-proof material etc., have broad prospects. The commonly used preparation methods mainly include: mixing method, template impregnation method, electrospinning method and electrochemical method. Its pore-forming mechanism mainly includes mechanical extrusion, particle accumulation, pore-forming agent, foaming, porous template, and condensed structure pore formation. However, these traditional preparation methods c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/622C04B38/00C04B38/06
CPCC04B35/117C04B35/622C04B38/0605C04B38/0615C04B2235/3206C04B2235/3208C04B2235/3232C04B2235/3418C04B2235/6022C04B2235/6562C04B2235/6567C04B38/0074
Inventor 叶喜葱林咸参熊金艳吴海华
Owner CHINA THREE GORGES UNIV
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