Preparation method of gradient functional ceramic

A technology of gradient function and ceramics, which is applied in the field of preparation of gradient function ceramics, can solve the problems of high processing cost, low forming efficiency, uneven green body, etc., and achieves high forming efficiency, high forming rate, high structure and dimensional accuracy. Effect

Inactive Publication Date: 2019-11-19
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the problems of inhomogeneous green body, low molding efficiency and high processing cost in the preparation of gradient functional ceramics in the prior art, and provides a method for efficiently preparing gradient functional ceramics, which has uniform green body, good interlayer bonding, and high-efficiency preparation. Gradient Functional Ceramics with Complex Shapes

Method used

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  • Preparation method of gradient functional ceramic

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Effect test

Embodiment 1

[0027] This embodiment provides a functionally gradient ceramic with an eight-layer structure as a stacked structural unit and a preparation method thereof. Concrete preparation steps are as follows:

[0028] (1) Preparation of ceramic composite powder: According to the gradient structure model, the ceramic composite powder in the slurry for 3D printing the corresponding ceramic layer was prepared respectively. Using absolute ethanol as a solvent, add the components that make up the ceramic composite powder into absolute ethanol in proportion, ultrasonically disperse for 10 minutes, and then ball mill for 12 hours at a ball milling speed of 250r / min to fully mix the components. The ultrasonicated mixture was poured into a rotary evaporator, and the solvent was evaporated at 60° C., and passed through a 100-mesh sieve to obtain a ceramic composite powder.

[0029] The composition of the ceramic composite powder used to prepare each layer of ceramics in the laminated structural...

Embodiment 2

[0046] This embodiment provides a gradient function ceramic with a six-layer structure and a preparation method thereof. Concrete preparation steps are as follows:

[0047] (1) Preparation of ceramic composite powder: According to the gradient structure model, the ceramic composite powder in the slurry for 3D printing the corresponding ceramic layer was prepared respectively. Using absolute ethanol as a solvent, add the components that make up the ceramic composite powder into absolute ethanol in proportion, ultrasonically disperse for 10 minutes, and then ball mill for 12 hours at a ball milling speed of 250r / min to fully mix the components. The ultrasonicated mixture was poured into a rotary evaporator, and the solvent was evaporated at 60° C., and passed through a 100-mesh sieve to obtain a ceramic composite powder.

[0048] The composition of the ceramic composite powder used to prepare each layer of ceramics is as follows:

[0049] Ceramic composite powder of the first ...

Embodiment 3

[0063] This embodiment provides a ten-layer functionally gradient ceramic and a preparation method thereof. Concrete preparation steps are as follows:

[0064] (1) Preparation of ceramic composite powder: According to the gradient structure model, the ceramic composite powder in the slurry for 3D printing the corresponding ceramic layer was prepared respectively. Using acetone as a solvent, add the components that make up the ceramic composite powder into acetone according to the proportion, ultrasonically disperse for 10 minutes, and then ball mill for 12 hours at a ball milling speed of 250r / min, so that the components are fully mixed. The ultrasonicated mixture was poured into a rotary evaporator, and the solvent was evaporated at 60° C., and passed through a 100-mesh sieve to obtain a ceramic composite powder.

[0065] The composition of the ceramic composite powder used to prepare each layer of ceramics is as follows:

[0066] Ceramic composite powder of the first layer...

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Abstract

The invention relates to the technical field of ceramic preparation, particularly to a preparation method of gradient functional ceramic. According to the invention, slurry and the process parametersof 3D printing are optimized, and particularly, sintering additives in ceramic composite powder in the slurry and the exposure energy of 3D printing are optimized; a blank is printed by adopting exposure energy corresponding according to different slurry; the blank obtained by 3D printing is uniform and has high forming rate; and a ceramic formed by degreasing and sintering the blank under certainconditions is small in deformability, high in structural and dimensional precision, good in interlayer cohesiveness and high in density and bending strength. The gradient functional ceramic preparedthrough the method is high in forming efficiency and forming size precision; the structure of the gradient functional ceramic can be accurately regulated and controlled; functionalization is achieved;the material cost of the ceramic can be reduced; and production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of ceramic preparation, in particular to a preparation method of gradient functional ceramics. Background technique [0002] Gradient functional ceramics is a kind of composite material composed of two or more materials with gradient changes in composition and structure. Compared with traditional composite materials, it has the characteristics of reducing interface residual stress and thermal stress, improving bonding strength, and realizing functionalization in different spaces. The current molding methods for manufacturing such gradient ceramic components include cold self-propagating high-temperature synthesis, dry pressing, particle co-sedimentation, and laser heating synthesis. The method of dry pressing has high efficiency, but it has the problem of uneven microstructure, and it is not easy to form complex shapes and special-shaped products; the preparation of metal-ceramic composite materials by self...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/10C04B35/584
CPCC04B35/10C04B35/584C04B35/80C04B2235/3217C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3244C04B2235/3882C04B2235/422C04B2235/425C04B2235/5212C04B2235/6026C04B2235/656C04B2235/6562C04B2235/6567C04B2235/6583C04B2235/775C04B2235/96
Inventor 伍尚华伍海东许锐悦林立甫
Owner GUANGDONG UNIV OF TECH
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