This paper proposed a method for preparing subtle and complex lattice structure Al2O3 ceramic via digital light processing (DLP) 3D printing technology. The solid-phase mass fraction of Al2O3 ceramic slurry and the porosity of the green body reached 52% and 83%, respectively. According to the TG-DSC curve and two-way analysis of variance, the optimum technological parameters for debinding and sintering of Al2O3 ceramic green body were determined. The same shrinkage of Al2O3 ceramic prepared by pressureless sintering in all directions was confirmed. The density of sintered lattice structure Al2O3 ceramic was 95%, and the diameter of the lattice structure strut was about 170 μm. XRD and Raman spectrum showed that the crystal phase of the sintered Al2O3 ceramic was α-phase, which has a good crystal quality. SEM results revealed a high density without significant pores and cracks sintered ceramic. The strict complex structure Al2O3 ceramic prepared by DLP technology had a compact microstructure and similar to the mechanical strength of Al2O3 prepared via the conventional shaping method, thereby providing an effective method for fabricating large specific surface area ceramic radiators and fine ceramic components in other fields.

中文翻译：

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数字光处理3D打印技术制备精细复杂晶格结构的Al2O3陶瓷

本文提出了一种通过数字光处理（DLP）3D打印技术制备精细复杂晶格结构Al2O3陶瓷的方法。Al2O3陶瓷浆料的固相质量分数和坯体的孔隙率分别达到52%和83%。根据TG-DSC曲线和双向方差分析，确定了Al2O3陶瓷坯体脱脂烧结的最佳工艺参数。证实了通过无压烧结制备的 Al2O3 陶瓷在各个方向上的收缩率相同。烧结晶格结构Al2O3陶瓷的密度为95%，晶格结构支柱的直径约为170μm。XRD和拉曼光谱表明，烧结Al2O3陶瓷的晶相为α相，具有良好的结晶质量。SEM 结果表明烧结陶瓷密度高，没有明显的孔隙和裂纹。DLP技术制备的Al2O3结构严格复杂，微观结构致密，机械强度与常规成型方法制备的Al2O3相似，为制造大比表面积陶瓷散热器和其他领域的精细陶瓷元件提供了有效方法。