Li₄SiO₄ ceramic pebble is deemed as the most attractive tritium breeder for fusion reactor blanket. In this work, we fabricated a novel Li₄SiO₄ pebble with micrometer-scale pore structure by digital light processing to verify the feasibility of complex pore structure manufacturing for future breeders. The effects of processing parameters on printing accuracy, microstructure and mechanical properties of Li₄SiO₄ pebbles were investigated. For synthesizing the pure Li₄SiO₄ phase, the optimal stoichiometric ratio of Li₂SiO₃ to Li₂CO₃ was 1:1.09 in the premixed powder. The photosensitivity of dual-phase ceramic suspension was investigated according to an attenuation model, and the overgrowth was reduced to ∼50 μm by using the dimension formula. After optimizing the post-processing, the radial pore structure Li₄SiO₄ pebbles with excellent crush load (50.3 N, standard deviation = 4.4 N) and suitable open porosity (18.3 %) can be yielded. This work provides a fresh solution to control the pore structure of tritium breeding pebbles in an unprecedented micrometer scale.

Li ₄ SiO ₄陶瓷卵石被认为是聚变反应堆包层中最有吸引力的氚增殖剂。在这项工作中，我们通过数字光处理制造了一种具有微米级孔隙结构的新型Li ₄ SiO _{4卵石，以验证未来育种者制造复杂孔隙结构的可行性。}研究了加工参数对Li ₄ SiO ₄卵石打印精度、显微组织和力学性能的影响。为了合成纯Li ₄ SiO ₄相，预混粉末中Li ₂ SiO ₃与Li ₂ CO ₃的最佳化学计量比为1:1.09。根据衰减模型研究了双相陶瓷悬浮液的光敏性，并使用维数公式将过度生长减少至~50 μm。经过优化后处理，可以得到具有优异压碎载荷（50.3 N，标准差=4.4 N）和合适开孔率（18.3 %）的径向孔结构Li ₄ SiO _4卵石。这项工作提供了一种新的解决方案，可以在前所未有的微米尺度上控制氚增殖卵石的孔隙结构。