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Preparation method of laser sintering 3D printing rapid prototyping silicon nitride powder material

A silicon nitride powder and 3D printing technology is applied in the preparation of powder molding materials for laser sintering 3D printing manufacturing technology, and the preparation of laser sintering 3D printing rapid prototyping silicon nitride powder materials, which can solve problems such as increasing the preparation cost, Achieve the effect of narrow particle size distribution, good strength and easy control of conditions

Inactive Publication Date: 2015-07-01
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation methods of silicon nitride ceramics mainly include: powder pressing and sintering method, sol-gel method and reaction sintering method. A slight change in the shape of the component requires re-preparation of the mold or machining of the sample, thus increasing the cost of preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Pretreatment of silicon nitride ceramic powder: In the reactor, add ethanol: 70 mL, γ-methacryloxypropyltrimethoxysilane: 19 mL, stir well, and then add silicon nitride Ceramic powder: 25g, placed at a constant temperature of 45°C, vigorously stirred, and refluxed for 5 hours, filtered, washed with ethanol, dried, and ground to obtain pretreated silicon nitride ceramic powder;

[0024] (2) Preparation of laser sintering 3D printing rapid prototyping silicon nitride powder material: In the grinding machine, add separately, pre-treated silicon nitride ceramic powder: 80g, phenolic resin: 10g, melamine: 1.0g, glycerol tristearate Ester: 1.0g, turn on the grinder at 200 rpm, grind for 10 minutes, then add acetone: 10 mL, turn on the grinder at 200 rpm, grind for 30 minutes, dry to obtain laser sintering 3D printing rapid prototyping silicon nitride Powder material, the obtained laser sintering 3D printing rapid prototyping silicon nitride powder material has a particle ...

Embodiment 2

[0026] (1) Pretreatment of silicon nitride ceramic powder: In the reactor, add ethanol: 76 mL, γ-methacryloxypropyltrimethoxysilane: 17 mL, stir well, and then add silicon nitride Ceramic powder: 22g, placed at a constant temperature of 50°C, vigorously stirred, and refluxed for 4 hours, filtered, washed with ethanol, dried, and ground to obtain pretreated silicon nitride ceramic powder;

[0027] (2) Preparation of laser sintering 3D printing rapid prototyping silicon nitride powder material: In the grinder, add separately, pre-treated silicon nitride ceramic powder: 75g, phenolic resin: 8g, melamine: 1.5g, glycerol tristearate Ester: 1.5g, turn on the grinder at 200 rpm, grind for 10 minutes, then add acetone: 18 mL, turn on the grinder at 200 rpm, grind for 30 minutes, and dry to obtain laser sintering 3D printing rapid prototyping silicon nitride Powder material, the obtained laser sintering 3D printing rapid prototyping silicon nitride powder material has a particle size i...

Embodiment 3

[0029](1) Pretreatment of silicon nitride ceramic powder: In the reactor, add ethanol: 63 mL, γ-methacryloxypropyl trimethoxysilane: 23 mL, stir well, and then add silicon nitride Ceramic powder: 26g, placed at a constant temperature of 40°C, vigorously stirred, and refluxed for 6 hours, filtered, washed with ethanol, dried, and ground to obtain pretreated silicon nitride ceramic powder;

[0030] (2) Preparation of laser sintering 3D printing rapid prototyping silicon nitride powder material: In the grinder, add separately, pre-treated silicon nitride ceramic powder: 88g, phenolic resin: 5g, melamine: 0.5g, glycerol tristearate Ester: 0.5g, turn on the grinder at 200 rpm, grind for 10 minutes, then add acetone: 8 mL, turn on the grinder at 200 rpm, grind for 30 minutes, and dry to obtain laser sintering 3D printing rapid prototyping silicon nitride Powder material, the obtained laser sintering 3D printing rapid prototyping silicon nitride powder material has a particle size in...

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Abstract

The invention discloses a preparation method of a laser sintering 3D printing rapid prototyping silicon nitride powder material. The preparation method is characterized by comprising the following steps: firstly, pretreating silicon nitride ceramic powder with gamma-methacryloxypropyltrimethoxysilane in an ethyl alcohol solvent to obtain pretreated silicon nitride ceramic powder; then, in percentage by mass, adding 75-88% of the pretreated silicon nitride ceramic powder, 5-15% of phenolic resin, 0.5-1.5% of melamine and 0.2-1.5% of glyceryl tristearate into a grinding miller, starting the grinding miller, grinding for 10min at 200r / min, and adding acetone, wherein the sum of all the components is 100%; starting the grinding miller, grinding for 30min at 200r / min, and drying, thus obtaining the laser sintering 3D printing rapid prototyping silicon nitride powder material. The material can be directly prototyped under the condition of laser sintering; the preparation process is simple, the preparation conditions are easy to control, and the production cost is low; therefore the preparation method of the laser sintering 3D printing rapid prototyping silicon nitride powder material can be easily put into industrial production.

Description

technical field [0001] The invention relates to a method for preparing powder molding materials used in laser sintering 3D printing manufacturing technology, which belongs to the field of rapid prototyping materials, and in particular to the preparation and application of a laser sintering 3D printing rapid prototyping silicon nitride powder material. Background technique [0002] 3D printing (3D printing) is a method based on digital model files, using fluid, powder, wire (rod) and other materials that can be cured, bonded, and fused, and solidified, bonded, and fused layer by layer. techniques for constructing objects. It is often used to make models in the fields of mold manufacturing and industrial design, and is gradually used in the direct manufacture of some products. There are already parts printed using this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/622C04B35/64B33Y10/00
Inventor 李慧芝张培志曹冲候金焕
Owner UNIV OF JINAN
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