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Polymer precursor porous magnetic ceramic system based on 3D printing technology and preparation method thereof

A magnetic ceramic and 3D printing technology, which is applied to ceramic products, other household appliances, applications, etc., can solve the problems of many cracks and the inability to prepare porous ceramics, etc., achieve strong oxidation resistance, good electromagnetic absorption performance, and reduce preparation time. cost effect

Pending Publication Date: 2021-02-05
SHANGHAI HANGYI HI TECH DEV RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a binder, and the prepared ceramics may have many cracks, and it is impossible to prepare porous ceramics with complex shapes

Method used

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  • Polymer precursor porous magnetic ceramic system based on 3D printing technology and preparation method thereof
  • Polymer precursor porous magnetic ceramic system based on 3D printing technology and preparation method thereof
  • Polymer precursor porous magnetic ceramic system based on 3D printing technology and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a polymer precursor porous magnetic ceramic system based on 3D printing technology, the system includes: a slurry configuration unit 100, a 3D printer 200 and a calcination boiler 300;

[0042] The slurry configuration unit 100 includes: a pretreatment tank 101 and an ultrasonic stirring tank 102;

[0043] The pretreatment tank 101 is used to prepare a modified pore-forming agent,

[0044] The ultrasonic stirring tank 102 is used to add the modified pore forming agent, magnetic nanoparticles, inert filler and polymer precursor into the organic solvent for stirring and mixing, and the organic solvent is volatilized by ultrasonic treatment to obtain the printing paste;

[0045] The 3D printer 200 uses the printing paste to print to obtain the blank;

[0046] The calcining boiler 300 calcines the green body to obtain porous magnetic ceramics.

[0047] The preparation system has a simple structure and a simple process flow, can make full use of...

Embodiment 2

[0049] Such as figure 2 As shown, the present invention also provides a preparation method for preparing the porous magnetic ceramics, comprising the following steps:

[0050] A: slurry configuration

[0051] Pour the organic pore-forming agent into the pretreatment tank, and add a modifying agent for modification to obtain a modified pore-forming agent;

[0052] Add the modified pore-forming agent, magnetic nanoparticles, inert filler and polymer precursor into the ultrasonic stirring tank, add an organic solvent for high-speed stirring and mixing, and volatilize the organic solvent through ultrasonic treatment to obtain printing paste;

[0053] Among them: the mass ratio of pore-forming agent: nano-magnetic particles: inert filler: ceramic precursor is: 5-50: 1-20: 1-20: 50-150, and the printing paste is in 1s -1 The viscosity at the shear rate is 200Pa·s-1500Pa·s;

[0054] B: Preparation of plain embryos

[0055] The printing paste obtained in step A is placed in a 3D ...

Embodiment 3

[0065] The preparation of the porous magnetic ceramics comprises the following steps:

[0066] A: slurry configuration

[0067] Pretreatment of nanocrystalline cellulose with silane coupling agent KH570 to obtain modified nanocrystalline cellulose;

[0068] Add modified nanocrystalline cellulose, tetrairon sesquioxide nanoparticles coated with silane on the surface, silicon carbide powder and polycarbosilane into n-hexane and mix at high speed, then ultrasonically treat, and volatilize part of the organic solvent to obtain printing paste;

[0069] Among them: modified nanocrystalline cellulose, tetrairon sesquioxide nanoparticles coated with silane on the surface, silicon carbide powder and polycarbosilane mass ratio: 20:6:12:120, the printing paste was sheared at 1s-1 The viscosity at the speed is 656Pa·s;

[0070] B: Plain embryo preparation: put the printing paste in a 3D printer to obtain a plain embryo through ink direct writing 3D printing;

[0071] C: Atmosphere sint...

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Abstract

The invention relates to the technical field of ceramic material preparation, in particular to a polymer precursor porous magnetic ceramic system based on a 3D printing technology, which comprises a slurry preparation unit, a 3D printer and a calcining boiler, the slurry preparation unit comprises a pretreatment tank and an ultrasonic stirring kettle; the pretreatment tank is used for preparing amodified pore-forming agent, the ultrasonic stirring kettle is used for adding the modified pore-forming agent, magnetic nanoparticles, an inert filler and a polymer precursor into an organic solventfor stirring and mixing, and the organic solvent is volatilized through ultrasonic treatment to obtain printing slurry; the 3D printer uses the printing slurry for printing to obtain a green body ; and the green body is calcined by a calcining boiler to obtain a porous magnetic ceramic. The preparation method is used for preparing the porous magnetic ceramic and comprises the following steps: A, preparing the slurry; b, preparing the green body; and c, performing atmospheric sintering. The preparation process is simple, the production cost is low, and the economic value of the prepared productis high.

Description

technical field [0001] The invention relates to the technical field of ceramic material preparation, in particular to a polymer precursor-based porous magnetic ceramic system based on 3D printing technology and a preparation method thereof. Background technique [0002] Transformation of polymer precursors into ceramics The ceramic precursors are converted into thermosetting polymers through cross-linking and curing treatment, and then subjected to high-temperature cracking to obtain ceramic products. The polymer precursor converted ceramic has a special amorphous structure, and contains free carbon, which has good dielectric properties. At the same time, it also has excellent properties such as oxidation resistance, high temperature resistance, and high hardness of the ceramic material itself. And the microwave absorption field of radio transmission equipment has been widely concerned, which can prevent electromagnetic radiation, reduce electromagnetic pollution, and ensure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/626C04B35/622C04B35/565C04B35/64B33Y80/00B33Y70/10B33Y10/00C04B35/584
CPCC04B38/0645C04B35/62635C04B35/6264C04B35/622C04B35/6263C04B35/571C04B35/64B33Y80/00B33Y70/10B33Y10/00C04B35/589C04B38/0675C04B2235/3272C04B2235/3418C04B2235/3275C04B38/0074C04B38/0067
Inventor 范鑫刘欢皮志超汤浩
Owner SHANGHAI HANGYI HI TECH DEV RES INST CO LTD
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