3D printing method for ceramic material

A 3D printing and ceramic material technology, applied in the direction of additive processing, etc., can solve the problems of harsh use and storage conditions, uneven structure, high cost of macroscopic molding, etc., achieve simple raw material processing process, improve structural uniformity, and achieve rapid densification Effect

Inactive Publication Date: 2017-09-29
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The low density and uneven structure are firstly due to the printing method itself. The extensive use of binders and the layer-by-layer bonding process will bring problems in the pores and interfaces of the formed body; secondly, the sintering process, which is obtained through 3D printing. The complex shape of the conventional sintering process will further aggravate the inhomogeneity of the structure due to problems such as anisotropic shrinkage and internal and external temperature gradients.
[0007] (2) The process is complicated, and post-processing technology is required to improve product quality
[0009] (3) The cost of macro molding is high and the efficiency is low
[0010] Although the organic precursor-stereolithography technolog

Method used

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  • 3D printing method for ceramic material
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  • 3D printing method for ceramic material

Examples

Experimental program
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Effect test

Embodiment 1

[0059] use figure 1 The “powder-spreading-inkjet” configuration printer shown in Figure A in the middle uses the alumina material with low dielectric loss as the substrate, and the mixed slurry of magnesium oxide, silicon oxide and ferrite as the high dielectric loss “wave absorbing Ink material" is evenly sprayed layer by layer on the base material after the powder supply and powder spreading mechanism completes the action to form a printing area. After the 3D printing process is completed, apply a 2.45GHz multi-mode electromagnetic field to the entire powder bed (including the 3D printing area). By adjusting the input power of the electromagnetic wave, control the heating rate in the range of 60-70°C / min, and keep it warm for 5 minutes after reaching 1580°C. , and then stop the microwave input, and cool down with the furnace. The 3D printing sample is taken out from the alumina matrix powder bed, and the alumina powder particles adhered to the surface can be removed by simp...

Embodiment 2

[0061] use figure 1 The "multi-nozzle linkage" configuration printer shown in Figure B in the middle, two groups of nozzles are respectively responsible for the low dielectric loss wave-transmitting phase alumina and the high dielectric loss wave-absorbing phase (mixed slurry of magnesium oxide, silicon oxide and ferrite) ), and complete 3D printing layer by layer according to the designed shape structure of multiphase alumina ceramics and the relative position of each phase in space. Afterwards, move the printed body as a whole to the 2.45GHz multimode cavity. By adjusting the electromagnetic wave input power, control the heating rate in the range of 60-70°C / min. After reaching 1580°C, keep the temperature for 5 minutes, then stop the microwave input, and cool down with the furnace. The sample microstructure is as figure 2 As shown in b, the microstructure is uniform and compact as a whole, without obvious defects. The relative density of the sample measured by the Archime...

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Abstract

The invention provides a 3D printing method for a ceramic material. The 3D printing method comprises the following steps: A) distributing a material with high dielectric loss into the powder of a material with low dielectric loss so as to form a printing body; and B) placing the printing body obtained in the step A) in a microwave electromagnetic field for curing and sintering of the printing body. The 3D printing method provided by the invention is based on the characteristics of selective heating and integral heating of electromagnetic waves; when a supporting structure totally wraps the printing body, selective heating, curing and sintering of a printing area are realized, and structural uniformity is improved; meanwhile, outfield auxiliary effect can promote mass transfer process, so rapid densification of the ceramic material is realized; and a microstructure different from the microstructures of conventional sintering products can be obtained while the macrostructure of the shape of the ceramic material is designed, controllable manufacturing of organizational structures of different sizes can be realized, and thus, structure-function integrated designing and manufacturing of the ceramic material is realized. The 3D printing method has the characteristics of simple raw material treatment and low printing cost and has the potential of industrial application.

Description

technical field [0001] The invention relates to the technical fields of material science and manufacturing engineering, and in particular to a 3D printing method for ceramic materials, which can realize the integrated design and manufacture of the ceramic material's macrostructure and microstructure. Background technique [0002] One of the important research directions of advanced ceramic materials is the materials with integrated structure and function and the corresponding advanced preparation technology. Carrying out the joint design and research of "composition-process-structure-performance" of advanced ceramic materials, reducing manufacturing costs and improving material quality will generate huge scientific and economic value. [0003] Forming and sintering are the key steps in the preparation of high-performance ceramics. They affect the macroscopic and microscopic structures of the material respectively, and then determine the performance of the product. The emerg...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/64C04B35/10B33Y10/00B33Y70/00
CPCB33Y10/00B33Y70/00C04B35/10C04B35/622C04B35/64C04B2235/3206C04B2235/3274C04B2235/3418C04B2235/667C04B2235/77
Inventor 左飞孟凡于俊杰林华泰
Owner GUANGDONG UNIV OF TECH
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