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Mullite mixed powder and preparation method thereof, and application in 3D printing

A technology of mullite powder and mixed powder, applied in the direction of additive processing, can solve the problems of poor environmental protection performance of resin-based materials and high cost of light curing, and achieve the effect of good environmental protection effect

Active Publication Date: 2020-11-17
山西高速公路工程检测有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned shortcoming of the prior art, provide a kind of mullite mixed powder and its preparation method and the application in 3D printing, this method is used to solve the photocuring cost in the prior art and resin-based Defects of poor environmental performance of materials

Method used

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  • Mullite mixed powder and preparation method thereof, and application in 3D printing
  • Mullite mixed powder and preparation method thereof, and application in 3D printing
  • Mullite mixed powder and preparation method thereof, and application in 3D printing

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preparation example Construction

[0023] The invention discloses a mullite mixed powder and its preparation method and its application in 3D printing. It is a water-based solidified 3D printing mullite mixed powder and a 3D printing method. The method comprises the following steps:

[0024] Step 1, mix and dry

[0025] Mix mullite powder, low-temperature quick-setting powder and high-temperature reaction powder according to the mass ratio of 70% to 85%, 5% to 15% and 5% to 15%, and the ratio of the three is 100%. Dry in medium for more than 24h at a temperature of 80°C to prepare a mixed powder.

[0026] Among them, the mullite powder is the powder obtained by ball milling after sintering and heat preservation at 1500°C for 2 hours. The particle size of the powder is 100-300 μm. The mixed powder composed of sodium has a mass ratio of 60-75%, 10-20%, 2-5%, 1-8%, 4-7%.

[0027] The high-temperature reaction powder is composed of metal lithium, aluminum powder and silicon powder, wherein the mass proportion of ...

Embodiment 1

[0034] The proportions of mullite powder, low-temperature quick-setting powder, and high-temperature reaction powder are 70%, 15%, and 15% respectively. Mullite powder is ball milled after sintering at 1500°C, and the particle size of the powder is 150 μm. After the three powders are mixed, they must be dried in a drying oven for more than 24 hours at a temperature of 80°C. Low-temperature quick-setting powder is a mixed powder composed of ordinary silicon cement, double-fast cement, lithium chloride, aluminum chloride, and sodium chloride, and its proportions are 65%, 20%, 5%, 3%, and 7%. . The high-temperature reaction powder is mainly composed of lithium-aluminum-silicon-based glass powder, wherein the mass fraction of aluminum is 15%. Glass powder particle size 2mm. Mullite mixed powder, low-temperature quick-setting powder, and high-temperature reaction powder are granulated through resin mixed liquid. The resin is a composite resin of phenolic resin and epoxy resin. Th...

Embodiment 2

[0036]The proportions of mullite powder, low-temperature quick-setting powder, and high-temperature reaction powder are 75%, 10%, and 15% respectively. The mullite powder is obtained by ball milling after sintering at 1500°C, and the particle size of the powder is 230 μm. After the three powders are mixed, they must be dried in a drying oven for more than 24 hours at a temperature of 80°C. Low-temperature quick-setting powder is a mixed powder composed of ordinary silicon cement, double-fast cement, lithium chloride, aluminum chloride, and sodium chloride, and its proportions are 75%, 10%, 5%, 3%, and 7%. . The high-temperature reaction powder is mainly composed of lithium-aluminum-silicon-based glass powder, wherein the mass fraction of aluminum is 18%. Glass powder particle size 0.5μm. Mullite mixed powder, low-temperature quick-setting powder, and high-temperature reaction powder are granulated through resin mixed liquid. The resin is a composite resin of phenolic resin a...

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Abstract

The invention discloses mullite mixed powder and a preparation method thereof, and application in 3D printing. In the application process, 3D printing forming of complex shapes of mullite blocks is achieved through layered water mist curing of mixed mullite powder in a 3D manner, and finally high-temperature reaction powder reacts with the mullite powder at a high temperature to obtain the porousmullite body with certain strength. According to the method, porous mullite crystals are prepared by adopting a mode of combining 3D printing with sintering, and accurate control of shape and performance parameters is realized by controlling component differences in 3D printing powder. In the 3D printing process, water is adopted as a 3D printing curing agent, so that the forming mode is simple and environmentally friendly.

Description

【Technical field】 [0001] The invention belongs to the technical field of porous mullite structure, and in particular relates to a mullite mixed powder, a preparation method thereof and an application in 3D printing. 【Background technique】 [0002] Due to its small bulk density, good thermal shock resistance, low heat capacity and thermal conductivity, the porous mullite structure has a wide range of applications in high temperature insulation, filtration, catalysis, ion exchange and other fields. At present, the porous mullite structure is often prepared by adding pore-forming agents, organic foam impregnation method, sol-gel method and other methods. However, the preparation process directly determines the pore structure and porosity of porous materials, which has a certain impact on performance and applications. In large-scale applications, the conventional extensive production has a poor degree of precise control over the mullite structure, making this series of products...

Claims

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Application Information

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IPC IPC(8): C04B35/626C04B35/185C04B35/622C04B35/63B33Y10/00B33Y70/10B33Y80/00
CPCC04B35/62605C04B35/185C04B35/622C04B35/6303B33Y70/10B33Y80/00B33Y10/00C04B2235/3203C04B2235/3217C04B2235/3201C04B2235/40C04B2235/402C04B2235/428C04B2235/36C04B2235/5436C04B2235/5427C04B2235/6026C04B2235/656C04B2235/6567C04B2235/96
Inventor 洪小刚李永红武永明张海宝曾二龙张亚明耿刚强
Owner 山西高速公路工程检测有限公司
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