A kind of preparation method of aluminum oxide powder 3D printing material

A kind of aluminum oxide powder, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of large shrinkage of parts and affect the dimensional accuracy of parts, and achieve the effect of high molding precision, low production cost and stable properties

Inactive Publication Date: 2016-11-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The higher the binder ratio, the easier the sintering, but the shrinkage of the parts is relatively large during the post-processing process, which will affect the dimensional accuracy of the parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Alumina powder pretreatment: In the reactor, add water: 60 mL, sodium hexametaphosphate: 5g, stir and dissolve, then add alumina powder: 35g, stir vigorously, and react at a constant temperature of 50±2°C 4h, after cooling, filter, wash, and dry to obtain pretreated alumina powder;

[0025] (2) Preparation of alumina powder 3D printing materials: In the grinder, add separately, process alumina powder: 84g, photosensitive epoxy resin: 4g, petroleum resin: 2g, hydroxylamine hydrochloride: 1g, turn on the grinder at 400 rpm, grind for 5 min, then add acetone: 11 mL, grind the mill at 400 rpm, grind for 25 min, and dry to obtain the alumina powder 3D printing material. The particle size of the obtained alumina powder 3D printing material is In the range of 0.5~2.0μm.

Embodiment 2

[0027] (1) Pretreatment of alumina powder: In the reactor, add water: 56 mL, sodium hexametaphosphate: 6 g, stir and dissolve, then add alumina powder: 38 g, stir vigorously, and react at a constant temperature of 50±2°C 3h, after cooling, filter, wash, and dry to obtain pretreated alumina powder;

[0028] (2) Preparation of alumina powder 3D printing materials: In the grinder, add separately, process alumina powder: 87g, photosensitive epoxy resin: 3g, petroleum resin: 1.5g, hydroxylamine hydrochloride: 0.5g, turn on the speed of the grinder Grind at 400 rpm for 5 min, then add acetone: 10 mL, grind at 400 rpm, grind for 20 min, and dry to obtain the alumina powder 3D printing material. The diameter is in the range of 0.5~2.0μm.

Embodiment 3

[0030](1) Pretreatment of alumina powder: In the reactor, add water: 66mL, sodium hexametaphosphate: 4g, stir and dissolve, then add alumina powder: 30g, stir vigorously, and react at a constant temperature of 50±2°C for 5h , after cooling, filter, wash, and dry to obtain pretreated alumina powder;

[0031] (2) Preparation of alumina powder 3D printing materials: In the grinder, add separately, process alumina powder: 80g, photosensitive epoxy resin: 6g, petroleum resin: 3g, hydroxylamine hydrochloride: 1g, turn on the grinder at 400 rpm, grind for 5 min, then add acetone: 12 mL, grind the mill at 400 rpm, grind for 30 min, and dry to obtain the alumina powder 3D printing material. The particle size of the obtained alumina powder 3D printing material is In the range of 0.5~2.0μm.

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Abstract

The invention discloses a preparation method of an aluminum oxide powder 3D printing material. The preparation method is characterized by comprising the following steps: adopting a sodium hexametaphosphate aqueous solution to pretreat the aluminum oxide powder, and obtaining the pretreated aluminum oxide powder; adding the following constituents into a grinding miller according to mass percent: 80-87% of aluminum oxide powder, 2-6% of photosensitive epoxy resin, 1-3% of petroleum resin and 0.5-3% of hydroxylamine hydrochloride; starting the grinding miller, keeping the revolving speed to be 400 rpm, grinding for 5 minutes, and then adding 8-15% of acetone, wherein the sum of the constituents in mass percent is 100%; keeping the revolving speed of the grinding miller to be 400 rpm, then grinding for 20-30 minutes, drying, and at last obtaining the aluminum oxide powder 3D printing material. The material can be directly molded instead of being sprayed with an adhesive substance under a laser sintering condition, is high in molding precision, simple in preparation process, easy to control conditions, low in production cost, and easy for 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 a preparation method and application of alumina powder 3D printing material. Background technique [0002] Laser sintering is a method of additive manufacturing. This process also uses the laser as the energy source, and the powder of plastic, wax, ceramic, metal or its composite is uniformly sintered on the processing plane through the laser beam. Spread a layer of very thin (sub-millimeter) powder evenly on the workbench as the raw material, and the laser beam is scanned by the scanner at a certain speed and energy density according to the layered two-dimensional data under the control of the computer. After scanning by the laser beam, the powder at the corresponding position is sintered into a solid sheet with a certain thickness, and the unscanned part remains in the form o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/626B33Y70/00
Inventor 李慧芝许崇娟李志英刘玉
Owner UNIV OF JINAN
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