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Preparation method of MgAlON ceramic powder based on 3D printing forming

A 3D printing and ceramic powder technology, which is applied in the field of MgAlON ceramic powder preparation based on 3D printing, can solve the problems of macro-preparation of MgAlON ceramic powder and other problems, and achieve the prevention of synthesis reaction, increase the furnace capacity, and facilitate handling Effect

Active Publication Date: 2021-02-02
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing MgAlON ceramic powder based on 3D printing to solve the problem of macro-preparation of MgAlON ceramic powder that requires high-temperature gas-solid reaction

Method used

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  • Preparation method of MgAlON ceramic powder based on 3D printing forming
  • Preparation method of MgAlON ceramic powder based on 3D printing forming
  • Preparation method of MgAlON ceramic powder based on 3D printing forming

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Experimental program
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Effect test

Embodiment 1

[0029] The MgAlON powder is prepared using a ceramic powder preparation method based on 3D printing, which specifically includes the following steps:

[0030] (1) weigh nanoscale γ-A12O3 powder 87.4g, nanoscale MgO powder 8.8g, high-purity carbon black powder 3.8g, polyethylene glycol 5g, urea 0.5g, ammoniacal liquor 0.5g, composite solvent 125g (by water, A mixed liquid composed of tert-butanol (75%, 25% by weight) and alumina balls was put into a polyurethane ball mill jar, and ball milled on a homogenizer at a speed of 2000r / min for 2min to obtain a solid phase content of about 44% raw ink;

[0031] (2) Inject the above raw material ink into the barrel of the 3D printer for printing and molding. The diameter of the printing nozzle is 2mm, the printing pressure is 180kPa, and the printing speed is 15mm / s. After printing, put the raw material body into a drum with a temperature of 100°C Dried for 12 hours in an air oven to obtain a raw material body with an internal regular ...

Embodiment 2

[0035] The MgAlON powder is prepared using a ceramic powder preparation method based on 3D printing, which specifically includes the following steps:

[0036] (1) Weigh 87.5g of nanoscale α-A12O3 powder, 8.5g of nanoscale MgO powder, 4.0g of high-purity carbon black powder, 4g of polyvinyl alcohol, 0.4g of tetramethylammonium hydroxide, 0.4g of ammonia water, and 112g of composite solvent (the mixed liquid that is made up of water, tert-butanol, proportion by weight is 80%, 20% respectively) and aluminum oxide grinding ball, put into the plastic container and stir, fully grind on the three-roller mill then, obtain solid phase content approx. 47% raw ink;

[0037] (2) Inject the above raw material ink into the barrel of the 3D printer for printing and molding. The diameter of the printing nozzle is 3mm, the printing pressure is 120kPa, and the printing speed is 15mm / s. Dry in a freeze dryer for 24 hours to obtain a raw material body with an internal regular three-dimensional t...

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Abstract

The invention discloses a preparation method of MgAlON ceramic powder based on 3D printing molding, which comprises the following steps: (1) mixing raw material powder, a solvent and an additive to prepare raw material ink with high solid content, (2) printing the raw material ink into a raw material green body with a regular three-dimensional through hole structure by adopting a 3D printing forming process, and drying the raw material green body, (3) putting the raw material blank into a reaction device with airflow control and anti-pollution functions in a high-temperature graphite sinteringfurnace, and carrying out high-temperature synthesis in a controlled reaction environment, and (4) finally, carrying out ball-milling process treatment to obtain the high-purity MgAlON ceramic powder. By means of the method, the raw material powder can be printed into a green body with a regular three-dimensional through hole structure, a gas-solid synthesis reaction can be fully carried out during high-temperature synthesis, and the high-purity MgAlON ceramic powder can be obtained by combining the gas flow control and anti-pollution functions of the ceramic powder synthesis reaction device.

Description

technical field [0001] The invention belongs to the field of powder preparation, and in particular relates to a method for preparing MgAlON ceramic powder based on 3D printing. Background technique [0002] MgAlON can be regarded as a stable spinel structure ceramic material formed after MgO is dissolved in γ-AlON. The addition of Mg element makes the ceramic material have better thermodynamic stability than γ-AlON ceramics. MgAlON ceramics have properties such as small thermal expansion coefficient, good thermal shock resistance, strong slag corrosion resistance, and low wettability to molten metal. They can be used as refractory materials in the iron and steel metallurgy industry; It has the characteristics of good performance (light transmittance greater than 82% in the range of 0.5-4.5μm), and can replace sapphire for the preparation of wave-transparent windows and transparent armor. The wide application of high-performance MgAlON transparent ceramics depends on the mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/64C04B35/626B28B1/00B33Y10/00B33Y70/10
CPCB28B1/001B33Y10/00B33Y70/10C04B35/58C04B35/64C04B35/626C04B2235/3217C04B2235/3206C04B2235/424C04B2235/322C04B2235/6026
Inventor 岳映雷徐婷婷任俊业
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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