04
2024
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09
Industry New Knowledge | Using DLP 3D Printing to Achieve High Transparent Yttrium Oxide Ceramics
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Industry new knowledge
Recently, a team led by Yun, Hui-suk of Daejeon University of Science and Technology in South Korea, published a study entitled Fabrication of highly transparent yttria by DLP-based additive manufacturing in the Journal of the European Ceramic Society,By optimizing the printing process and sintering technology, the problem of limited geometric structure in the traditional manufacturing method is solved, and the transparent yttrium oxide ceramic with complex three-dimensional structure is manufactured.
Original link: https://www.sciencedirect.com/science/article/abs/pii/S0955221924002693
Adventure Technology official website: http://www.adventuretech.cn/
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research content
Due to their excellent optical and mechanical properties, transparent ceramic materials have shown great potential in high-tech applications, such as optical components, laser equipment and protective coatings.Compared with single crystal and glass, transparent ceramics have better thermal conductivity, thermal shock stability and physical and chemical properties. However, traditional manufacturing methods such as dry pressing, slip casting, and die pressing can only produce ceramics with simple geometries, which limits their range of applications. This study aims to solve these problems by optimizing the key factors in the DLP 3D printing process, and provides new possibilities for manufacturing transparent ceramics with complex structures.
The core research contents of the article include:
Material selection and formulation optimization: Yttria was used as the base material, and lanthanum oxide (La2O3) and zirconium oxide (ZrO2) were introduced as sintering additives. By optimizing the dispersant concentration and solid loading of the ceramic slurry, the uniformity and density of the material during the printing process are ensured.
Printing and sintering process: The preliminary green body is printed by DLP technology, and then after pre-sintering and vacuum sintering, the high transparency yttrium oxide ceramic is finally obtained. The study also focuses on the effect of different sintering conditions on the transparency of the material.
Performance test: The microstructure, optical properties and mechanical properties of the prepared ceramic materials were fully characterized. The test results show that the yttrium oxide ceramics obtained by the optimized sintering process have a theoretical transparency of 94.86% and a relative density of 99.89%.
Figure 1, (a) doped Y2O3 powder preparation and (B) additive manufacturing process schematic of transparent Y2O3.
△ Figure 2,(a) Morphology of pure and (B) doped Y2O3,(c) particle size distribution, and (d) XRD patterns of pure and doped Y2O3.
△ Figure 3, Viscosity curves of Y2O3 mud (2% dispersant) with different concentrations of dispersant, (c) pure and (d) doped Y2O3 mud (2% dispersant).
△ Figure 4,(a) At a wavelength of 300nm to 500nm, the effect of exposure time on pure and doped Y2O3 powder slurry and (B) absorbance curing depth.
Figure 5,(a) pure and (B) doped Y2O3 embryo TGA and DTG results,(c) pure and (d) doped Y2O3 embryo de-banding profile.
6,(a) pure and (B) doped Y2O3 embryo microstructure;(c) pure and (d) doped Y2O3 in 1700 ◦ C sintered body;(e) in-line transmittance of pure and doped Y2O3;(f) photograph of printed Y2O3 ceramics sintered in 1700 ◦ C.
7, microstructures of pre-sintering at (a) 1150 ◦ C, (B) 1250 ◦ C, (c) 1350 ◦ C, and (d) 1450 ◦ C. FIG. (E) The relative density of doped Y2O3 pre-sintered at different temperatures.
△ Figure 8,(a) On-line transmittance of doped Y2O3 after pre-sintering at different temperatures, (B) relative density and (c) photos after 1800 ◦ C vacuum sintering.
9, vacuum sintering of 1800 ◦ C after pre-sintering of (a) 1150 ◦ C, (B) 1250 ◦ C, (c) 1350 ◦ C, and (d) 1450 ◦ C.
△ Figure 10, Photograph of the doped Y2O3 embryo body and transparent prototype made by am:(a) lens array, (B) hollow cube,(c) gyroscope structure and (d) microlens array.
research conclusion
This study successfully demonstrated the feasibility of manufacturing high-transparency yttrium oxide ceramics through DLP 3D printing technology, and identified the key factors affecting the transparency of the ceramics, including the uniformity of the slurry, the density of the embryo body, and the removal of pores during the sintering process. These results provide new design possibilities and technical approaches for the application of transparent ceramics in complex geometries.
△ The above is the transparent resin prepared by our company using the self-developed DLP ceramic 3D printer. Photosensitive ceramic/resin materials can be printed. Teachers who need to do material and structure research and verification can contact me at any time.
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