Kuang Ning, Qi Hao, Zhao Wenjie, Wu Junfei
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China.
College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266061, China.
Polymers (Basel). 2025 May 15;17(10):1354. doi: 10.3390/polym17101354.
Digital light processing (DLP) is widely recognized as one of the most promising additive manufacturing technologies for ceramic fabrication. Nevertheless, during the additive manufacturing of zirconia ceramics, debinding and sintering often lead to structural defects, which severely deteriorate the material properties and hinder their broader application. In this study, we added an oligomer into the photosensitive resin and systematically investigated the effects of oligomer content on the viscosity and curing properties of ceramic suspensions. The results demonstrated that the introduction of oligomers is conducive to enhancing the crosslinking density and reducing defects. Finally, a 45 vol% solid content zirconia ceramic slurry was prepared by adding 20 wt% oligomers to the resin system. After printing, debinding, and sintering, the final zirconia ceramics exhibited a uniform microstructure without delamination or cracks, its bending strength reached 682.4 MPa. This study demonstrates that zirconia ceramics fabricated by photopolymerization with oligomer photosensitive resin exhibit excellent mechanical properties, significantly expanding the potential applications for high-performance zirconia ceramic components with additive manufacturing.
数字光处理（DLP）被广泛认为是用于陶瓷制造最有前途的增材制造技术之一。然而，在氧化锆陶瓷的增材制造过程中，脱脂和烧结常常会导致结构缺陷，这严重恶化了材料性能并阻碍了它们的更广泛应用。在本研究中，我们将一种低聚物添加到光敏树脂中，并系统地研究了低聚物含量对陶瓷悬浮液的粘度和固化性能的影响。结果表明，低聚物的引入有利于提高交联密度并减少缺陷。最后，通过向树脂体系中添加20 wt%的低聚物制备了固含量为45 vol%的氧化锆陶瓷浆料。经过打印、脱脂和烧结后，最终的氧化锆陶瓷呈现出均匀的微观结构，没有分层或裂纹，其弯曲强度达到682.4 MPa。本研究表明，采用低聚物光敏树脂通过光聚合制造的氧化锆陶瓷具有优异的机械性能，显著扩展了增材制造高性能氧化锆陶瓷部件的潜在应用。
