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Preparation of laser sintering rapid prototyping silicon nitride ceramic powder

A silicon nitride ceramic and laser sintering technology, which is applied in the preparation and application of laser sintering rapid prototyping silicon nitride ceramic powder and the preparation of laser sintering rapid prototyping powder materials, can solve problems such as increasing the preparation cost and achieve particle size distribution. Narrow range, small median particle size, energy saving effect

Inactive Publication Date: 2017-08-15
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

[0026] (1) Pretreatment of silicon nitride ceramic powder: In the reactor, add water: 65 mL, polyvinyl alcohol: 3 g, heat to dissolve, then add silicon nitride ceramic powder: 32 g, stir vigorously, and react for 3 h, Then spray drying to obtain pretreated silicon nitride ceramic powder;

[0027] (2) Preparation of laser sintering rapid prototyping silicon nitride ceramic powder: In the grinder, add separately, pre-treated silicon nitride ceramic powder: 82g, phenolic resin: 6g, polyvinyl butyral: 2.5 mL, three ethylene oxide Basetetramine: 1.0 mL, turn on the grinder at 250 rpm, grind for 5 min, then add acetone: 10 mL, grind at 250 rpm, grind for 50 min, and dry to obtain laser sintered rapid prototyping silicon nitride Ceramic powder, the obtained laser sintering rapid prototyping silicon nitride ceramic powder has a particle size within the range of 0.1-0.5 μm.

Embodiment 2

[0029] (1) Pretreatment of silicon nitride ceramic powder: In the reactor, add water: 70 mL, polyvinyl alcohol: 2 g, heat to dissolve, then add silicon nitride ceramic powder: 28 g, stir vigorously, and react for 2 h, Then spray drying to obtain pretreated silicon nitride ceramic powder;

[0030](2) Preparation of laser sintering rapid prototyping silicon nitride ceramic powder: In the grinder, add separately, pretreated silicon nitride ceramic powder: 80g, phenolic resin: 8g, polyvinyl butyral: 3.3 mL, Sanethylene Basetetramine: 0.8 mL, turn on the grinder at 250 rpm, grind for 5 minutes, then add acetone: 9 mL, turn the grinder at 250 rpm, grind for 40 minutes, and dry to obtain laser sintered rapid prototyping silicon nitride Ceramic powder, the obtained laser sintering rapid prototyping silicon nitride ceramic powder has a particle size within the range of 0.1-0.5 μm.

Embodiment 3

[0032] (1) Pretreatment of silicon nitride ceramic powder: In the reactor, add water: 60 mL, polyvinyl alcohol: 5 g, heat to dissolve, then add silicon nitride ceramic powder: 35 g, stir vigorously, and react for 4 h. Then spray drying to obtain pretreated silicon nitride ceramic powder;

[0033] (2) Preparation of laser sintering rapid prototyping silicon nitride ceramic powder: In the grinder, add separately, pretreated silicon nitride ceramic powder: 80g, phenolic resin: 4g, polyvinyl butyral: 1.6 mL, triethylene glycol Basetetramine: 2.0 mL, turn on the grinder at 250 rpm, grind for 5 minutes, then add acetone: 15 mL, turn the grinder at 250 rpm, grind for 60 minutes, and dry to obtain laser sintered rapid prototyping silicon nitride Ceramic powder, the obtained laser sintering rapid prototyping silicon nitride ceramic powder has a particle size within the range of 0.1-0.5 μm.

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Abstract

The invention discloses a preparation method of laser sintering rapid prototyping silicon nitride ceramic powder, which is characterized in that, firstly, polyvinyl alcohol is used to pretreat the silicon nitride ceramic powder to obtain pretreated silicon nitride ceramic powder; In the grinder, add by mass percentage, pretreatment silicon nitride ceramic powder: 80%~85%, phenolic resin: 4%~8%, polyvinyl butyral: 2%~5%, triethylenetetramine : 0.8%~3%, turn on the grinder at 250 rpm, grind for 5 minutes, then add acetone: 7%~12%, the sum of each component is 100%, grind at 250 rpm, and then grind for 40 ~60min, drying to obtain laser sintered rapid prototyping silicon nitride ceramic powder. The material can be directly formed under laser sintering, has high forming precision, and has the advantages of simple preparation process, easy control of conditions, low production cost and easy industrial production.

Description

technical field [0001] The invention relates to a preparation method for laser sintering rapid prototyping powder material, which belongs to the field of rapid prototyping materials, in particular to the preparation and application of laser sintering rapid prototyping silicon nitride ceramic powder. Background technique [0002] Rapid prototyping (RP) technology is an advanced manufacturing technology developed in the 1990s. It is a key common technology for the development of new products for manufacturing companies. It promotes product innovation, shortens new product development cycles, and improves product competition. Power has a positive impetus. Since the technology came out, it has been widely used in the manufacturing industry in developed countries, and a new technical field has emerged. [0003] RP technology is integrated and developed on the basis of modern CAD / CAM technology, laser technology, computer numerical control technology, precision servo drive techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/584C04B35/622
Inventor 李慧芝张培志曹冲陈亚明候金焕徐维峰
Owner UNIV OF JINAN