Multi-level porous material based on additive manufacturing, is a potentially disruptive material across multiple industries, including medical implants, thermal insulation and filtration. In this study, we propose a novel approach to fabricate materials with controllable pores via digital light processing (DLP) and decomposition of Al(OH)₃. DLP can be used to fabricate macro pores bigger than 300 μm. And the decomposition of Al(OH)₃ can result in micro pores of about 1 μm inside the scaffolds. The process parameters of curing, debinding and sintering temperature (1100-1500 ℃) of ceramic scaffolds with containing proportion of Al(OH)₃ (0-60 wt.%) were examined. The results indicated multi-level porous ceramic scaffold has controllable porosity and pore size distribution and meets the requirement of implant strength. Biological test show that ceramic scaffolds with multi-level pores promoted osteoblast proliferation and adhesion. The multi-level porous ceramic scaffolds prepared by DLP and decomposition of Al(OH)₃ have great prospects for the application in bone implants.

基于增材制造的多层多孔材料是跨多个行业的潜在破坏性材料，包括医疗植入物，隔热材料和过滤材料。在这项研究中，我们提出了一种通过数字光处理（DLP）和Al（OH）₃分解来制造具有可控孔的材料的新方法。DLP可用于制造大于300μm的大孔。并且，Al（OH）₃的分解会在支架内部产生约1μm的微孔。含Al（OH）₃比例的陶瓷支架的固化，脱脂和烧结温度（1100-1500℃）工艺参数检查了（0-60重量％）。结果表明，多层多孔陶瓷支架的孔隙率和孔径分布可控，满足植入强度要求。生物学测试表明，具有多级孔的陶瓷支架可促进成骨细胞的增殖和粘附。DLP制备的多级多孔陶瓷支架及Al（OH）_3的分解具有广阔的应用前景。