The fabrication of barium titanate (BaTiO₃) lead-free piezoelectric ceramics using additive manufacturing technology, especially digital light processing (DLP), has been gaining a growing interest for electrical applications. The particle size of the ceramic powders plays a key factor on the performance of sintered ceramic components. In this paper, BaTiO₃ ceramic components were fabricated by adopting different suspensions filled with the submicron powder particle size of 200 nm, 500 nm and 600 nm, respectively. Subsequently, the effects of particle size on the rheological properties and photopolymerization behaviors of the suspensions, as well as the density, grain size, piezoelectric and dielectric properties of the ceramic components, were investigated. The result indicated that the suspensions with the coarsest powder showed the lowest viscosity and the highest cure depth; when the grain size distributed in submicron range, the piezoelectric constant (d₃₃) and relative permittivity (ε_r) of sintered BaTiO₃ ceramic are direct positively correlated to the grain size. The value of ε_r and d₃₃ were related with domain structure affected by grain size. This work can provide a potential valuable guidance for researchers in selecting suitable BaTiO₃ powders to obtain high-performance piezoelectric ceramic components when using the DLP process.

使用增材制造技术，尤其是数字光处理 (DLP)制造钛酸钡 (BaTiO ₃ ) 无铅压电陶瓷，在电气应用中越来越受到关注。陶瓷粉末的粒径是影响烧结陶瓷部件性能的关键因素。在本文中，BaTiO ₃采用分别填充200 nm、500 nm和600 nm亚微米粉体的不同悬浮液制备陶瓷元件。随后，研究了粒径对悬浮液流变性能和光聚合行为的影响，以及陶瓷组分的密度、粒度、压电和介电性能。结果表明，具有最粗粉末的悬浮液表现出最低的粘度和最高的固化深度；当晶粒尺寸分布在亚微米范围内时，烧结BaTiO ₃陶瓷的压电常数( d ₃₃ )和相对介电常数( ε _r )与晶粒尺寸呈正相关。的价值ε _r和d ₃₃与受晶粒尺寸影响的畴结构有关。这项工作可以为研究人员在使用DLP工艺时选择合适的BaTiO ₃粉末以获得高性能压电陶瓷元件提供潜在的有价值的指导。